XRTX XORTX Therapeutics Inc

INVESTMENT POLICIES, TECHNIQUES AND RELATED RISKS

General

A Fund may consider changing its index at any time, including if, for example: the current index becomes unavailable; the Board believes that the current index no longer serves the investment needs of a majority of shareholders or that another index may better serve their needs; or the financial or economic environment makes it difficult for the Fund’s investment results to correspond sufficiently to its current index. If believed appropriate, a Fund may specify an index for itself that is “leveraged” or proprietary. There can be no assurance that a Fund will achieve its objective.

Fundamental securities analysis is not used by ProShare Advisors in seeking to correlate a Fund’s investment returns with its index. Rather, ProShare Advisors primarily uses a mathematical approach to determine the investments a Fund makes and techniques it employs. While ProShare Advisors attempts to minimize any “tracking error,” certain factors tend to cause a Fund’s investment results to vary from a perfect correlation to its index. See “Special Considerations” below for additional details.

2

Table of Contents

For purposes of this SAI, the word “invest” refers to a Fund directly and indirectly investing in securities or other instruments. Similarly, when used in this SAI, the word “investment” refers to a Fund’s direct and indirect investments in securities and other instruments. For example, the Funds typically invest indirectly in securities or instruments by using financial instruments with economic exposure similar to those securities or instruments.

Additional information concerning the Funds, their investment policies and techniques, and the securities and financial instruments in which they may invest is set forth below.

Name Policies

The Matching and Ultra ProShares Funds subject to the SEC “names rule” (Rule 35d-1 under the 1940 Act) have adopted non-fundamental investment policies obligating them to commit, under normal market conditions, at least 80% of their assets to securities contained in their index and/or investments with similar economic characteristics. The Short ProShares Funds subject to the “names rule” have adopted non-fundamental investment policies obligating them to commit, under normal market conditions, at least 80% of their assets to investments that, in combination, have economic characteristics that correlate to the inverse of its index. For purposes of each such investment policy, “assets” includes a Fund’s net assets, as well as amounts borrowed for investment purposes, if any. In addition, for purposes of such an investment policy, “assets” includes not only the amount of a Fund’s net assets attributable to investments directly providing investment exposure to the type of investments suggested by its name (e.g., the value of stocks, or the value of derivative instruments such as futures, options or options on futures), but also the amount of the Fund’s net assets that are segregated on the Fund’s books and records or being used as collateral, as required by applicable regulatory guidance, or otherwise used to cover such investment exposure. The Board has adopted a policy to provide investors with at least 60 days’ notice prior to changes in a Fund’s name policy.

Equity Securities (not applicable to the Global Fixed Income, Short Fixed Income, Ultra Fixed Income and Inflation and Volatility ProShares Funds)

The Funds may invest in equity securities. The market price of securities owned by a Fund may go up or down, sometimes rapidly or unpredictably. Securities may decline in value due to factors affecting securities markets generally or particular industries represented in the securities markets. The value of a security may decline due to general market conditions not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates, or adverse investor sentiment generally. A security’s value may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. The value of a security may also decline for a number of reasons that directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services. Equity securities generally have greater price volatility than fixed income securities, and the Funds are particularly sensitive to these market risks.

Foreign Securities (not applicable to the Inflation and Volatility ProShares Funds)

The Funds may invest in foreign issuers, securities traded principally in securities markets outside the United States, U.S.-traded securities of foreign issuers and/or securities denominated in foreign currencies (together “foreign securities”). Also, each Fund may seek exposure to foreign securities by investing in Depositary Receipts (discussed below). Foreign securities may involve special risks due to foreign economic, political and legal developments, including unfavorable changes in currency exchange rates, exchange control regulation (including currency blockage), expropriation or nationalization of assets, confiscatory taxation, taxation of income earned in foreign nations, withholding of portions of interest and dividends in certain countries and the possible difficulty of obtaining and enforcing judgments against foreign entities. Default in foreign government securities, political or social instability or diplomatic developments could affect investments in securities of issuers in foreign nations. In addition, in many countries there is less publicly available information about issuers than is available in reports about issuers in the United States. Foreign companies are not generally subject to uniform accounting, auditing and financial reporting standards, and auditing practices and requirements may differ from those applicable to U.S. companies. The growing interconnectivity of global economies and financial markets has increased the possibilities that conditions in any one country or region could have an adverse impact on issuers of securities in a different country or region.

In addition, the securities of some foreign governments, companies and markets are less liquid, and may be more volatile, than comparable securities of domestic governments, companies and markets. Some foreign investments may be subject to brokerage commissions and fees that are higher than those applicable to U.S. investments. A Fund also may be affected by different settlement practices or delayed settlements in some foreign markets. Furthermore, some foreign jurisdictions regulate and limit U.S. investments in the securities of certain issuers.

3

Table of Contents

A Fund’s foreign investments that are related to developing (or “emerging market”) countries may be particularly volatile due to the aforementioned factors.

A Fund may value its financial instruments based upon foreign securities by using market prices of domestically-traded financial instruments with comparable foreign securities market exposure.

Exposure to Securities or Issuers in Specific Foreign Countries or Regions

Some Funds focus their investments in particular foreign geographical regions or countries. In addition to the risks of investing in foreign securities discussed above, the investments of such Funds may be exposed to special risks that are specific to the country or region in which the investments are focused. Furthermore, Funds with such a focus may be subject to additional risks associated with events in nearby countries or regions or those of a country’s principal trading partners. Additionally, some Funds have an investment focus in a foreign country or region that is an emerging market and, therefore, are subject to heightened risks relative to Funds that focus their investments in more developed countries or regions.

Exposure to Foreign Currencies

Each Fund may invest directly in foreign currencies or hold financial instruments that provide exposure to foreign currencies, in particular “hard currencies,” or may invest in securities that trade in, or receive revenues in, foreign currencies. “Hard currencies” are currencies in which investors have confidence and are typically currencies of economically and politically stable industrialized nations. To the extent that a Fund invests in such currencies, that Fund will be subject to the risk that those currencies will decline in value relative to the U.S. dollar. Currency rates in foreign countries may fluctuate significantly over short periods of time. Fund assets that are denominated in foreign currencies may be devalued against the U.S. dollar, resulting in a loss. Additionally, recent issues associated with the euro may have adverse effects on non-U.S. investments generally and on currency markets. A U.S. dollar investment in Depositary Receipts or ordinary shares of foreign issuers traded on U.S. exchanges may be affected differently by currency fluctuations than would an investment made in a foreign currency on a foreign exchange in shares of the same issuer. Foreign currencies are also subject to risks caused by inflation, interest rates, budget deficits, low savings rates, political factors and government control.

Depositary Receipts

The Funds may invest in depositary receipts. Depositary receipts are receipts, typically issued by a financial institution, which evidence ownership of underlying securities issued by a non-U.S. issuer. Types of depositary receipts include American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and New York Shares (“NYSs”).

ADRs represent the right to receive securities of foreign issuers deposited in a domestic bank or a correspondent bank. ADRs are an alternative to purchasing the underlying securities in their national markets and currencies. For many foreign securities, U.S. dollar-denominated ADRs, which are traded in the United States on exchanges or over-the-counter (“OTC”), are issued by domestic banks. In general, there is a large, liquid market in the United States for many ADRs. Investments in ADRs have certain advantages over direct investment in the underlying foreign securities because: (i) ADRs are U.S. dollar-denominated investments that are easily transferable and for which market quotations are readily available, and (ii) issuers whose securities are represented by ADRs are generally subject to auditing, accounting and financial reporting standards similar to those applied to domestic issuers. ADRs do not eliminate all risk inherent in investing in the securities of foreign issuers. By investing in ADRs rather than directly in the stock of foreign issuers outside the U.S., however, the Funds can avoid certain risks related to investing in foreign securities on non-U.S. markets.

GDRs are receipts for shares in a foreign-based corporation traded in capital markets around the world. While ADRs permit foreign corporations to offer shares to American citizens, GDRs allow companies in Europe, Asia, the United States and Latin America to offer shares in many markets around the world. NYSs (or “direct shares”) are foreign stocks denominated in U.S. dollars and traded on American exchanges without being converted into ADRs. These stocks come from countries that do not restrict the trading of their stocks on other nations’ exchanges. Each Fund may also invest in ordinary shares of foreign issuers traded directly on U.S. exchanges

The Funds may invest in both sponsored and unsponsored depositary receipts. Certain depositary receipts, typically those designated as “unsponsored,” require the holders thereof to bear most of the costs of such facilities, while issuers of “sponsored” facilities normally pay more of the costs thereof. The depository of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited securities or to pass through the voting rights to facility holders with respect to the deposited securities, whereas the depository of a sponsored facility typically distributes shareholder communications and passes through the voting rights.

4

Table of Contents

Unsponsored ADR programs are organized independently and without the cooperation of the issuer of the underlying securities. As a result, available information concerning the issuers may not be as current for unsponsored ADRs, and the price of unsponsored depositary receipts may be more volatile than if such instruments were sponsored by the issuer and/or there may be no correlation between available information and the market value.

Futures Contracts and Related Options (not applicable to the Global Fixed Income ProShares Funds)

Each Fund may purchase or sell futures contracts and options thereon as a substitute for a comparable market position in the underlying securities or to satisfy regulatory requirements. A physical-settlement futures contract generally obligates the seller to deliver (and the purchaser to take delivery of) the specified asset on the expiration date of the contract. A cash-settled futures contract obligates the seller to deliver (and the purchaser to accept) an amount of cash equal to a specific dollar amount (the contract multiplier) multiplied by the difference between the final settlement price of a specific futures contract and the price at which the agreement is made. No physical delivery of the underlying asset is made.

Each Fund generally engages in closing or offsetting transactions before final settlement of a futures contract wherein a second identical futures contract is sold to offset a long position (or bought to offset a short position). In such cases, the obligation is to deliver (or take delivery of) cash equal to a specific dollar amount (the contract multiplier) multiplied by the difference between the price of the offsetting transaction and the price at which the original contract was entered into. If the original position entered into is a long position (futures contract purchased), there will be a gain (loss) if the offsetting sell transaction is carried out at a higher (lower) price, inclusive of commissions. If the original position entered into is a short position (futures contract sold) there will be a gain (loss) if the offsetting buy transaction is carried out at a lower (higher) price, inclusive of commissions.

When a Fund purchases a put or call option on a futures contract, the Fund pays a premium for the right to sell or purchase the underlying futures contract for a specified price upon exercise at any time during the option period. By writing (selling) a put or call option on a futures contract, a Fund receives a premium in return for granting to the purchaser of the option the right to sell to or buy from the Fund the underlying futures contract for a specified price upon exercise at any time during the option period.

Whether a Fund realizes a gain or loss from futures activities depends generally upon movements in the underlying currency, commodity, security or index. The extent of a Fund’s loss from an unhedged short position in futures contracts or from writing options on futures contracts is potentially unlimited. The Funds may engage in related closing transactions with respect to options on futures contracts. The Funds will engage in transactions in futures contracts and related options that are traded on a U.S. exchange or board of trade or that have been approved for sale in the U.S. by the U.S. Commodity Futures Trading Commission (“CFTC”).

Upon entering into a futures contract, each Fund will be required to deposit with the broker an amount of cash or cash equivalents in the range of approximately 5% to 10% of the contract amount for equity index futures and in the range of approximately 1% to 3% of the contract amount for treasury futures (this amount is subject to change by the exchange on which the contract is traded). This amount, known as “initial margin,” is in the nature of a performance bond or good faith deposit on the contract and is returned to the Fund upon termination of the futures contract, assuming all contractual obligations have been satisfied. Subsequent payments, known as “variation margin,” to and from the broker will be made daily as the price of the index underlying the futures contract fluctuates, making the long and short positions in the futures contract more or less valuable, a process known as “marking-to-market.” At any time prior to expiration of a futures contract, a Fund may elect to close its position by taking an opposite position, which will operate to terminate the Fund’s existing position in the contract.

When a Fund purchases or sells a futures contract, or buys or sells an option thereon, the Fund “covers” its position. To cover its position, a Fund may enter into an offsetting position, earmark or segregate with its custodian bank or on the official books and records of the Fund cash or liquid instruments (marked-to-market on a daily basis) that, when added to any amounts deposited with a futures commission merchant as margin, are equal to the market value of the futures contract or otherwise “cover” its position. When required by law, a Fund will segregate liquid assets in an amount equal to the value of the Fund’s total assets committed to the consummation of such futures contracts. Obligations under futures contracts so covered will not be considered senior securities for purposes of a Fund’s investment restriction concerning senior securities.

For example, a Fund may cover its long position in a futures contract by purchasing a put option on the same futures contract with a strike price (i.e., an exercise price) as high or higher than the price of the futures contract, or, if the strike

5

Table of Contents

price of the put is less than the price of the futures contract, the Fund will earmark/segregate cash or liquid instruments equal in value to the difference between the strike price of the put and the price of the future. A Fund may also “cover” its long position in a futures contract by taking a short position in the instruments underlying the futures contract, or by taking positions in instruments whose prices are expected to move relatively consistently, inversely to the futures contract. A Fund may “cover” its short position in a futures contract by purchasing a call option on the same futures contract with a strike price (i.e., an exercise price) as low or lower than the price of the futures contract, or, if the strike price of the call is greater than the price of the futures contract, the Fund will earmark or segregate cash or liquid instruments equal in value to the difference between the strike price of the call and the price of the future. A Fund may also “cover” its short position in a futures contract by taking a long position in the instruments underlying the futures contract, or by taking positions in instruments whose prices are expected to move relatively consistently to the futures contract. A Fund may cover its long or short positions in futures by earmarking or segregating with its custodian bank or on the official books and records of the Funds cash or liquid instruments (marked-to-market on a daily basis) that, when added to any amounts deposited with a futures commission merchant as margin, are equal to the market value of the futures contract or otherwise “cover” its position.

A Fund may cover its sale of a call option on a futures contract by taking a long position in the underlying futures contract at a price less than or equal to the strike price of the call option, or, if the long position in the underlying futures contract is established at a price greater than the strike price of the written (sold) call, the Fund will segregate liquid instruments equal in value to the difference between the strike price of the call and the price of the future. A Fund may also cover its sale of a call option by taking positions in instruments whose prices are expected to move relatively consistently to the call option. A Fund may cover its sale of a put option on a futures contract by taking a short position in the underlying futures contract at a price greater than or equal to the strike price of the put option, or, if the short position in the underlying futures contract is established at a price less than the strike price of the written put, the Fund will segregate cash or liquid instruments equal in value to the difference between the strike price of the put and the price of the future. A Fund may also cover its sale of a put option by taking positions in instruments the prices of which are expected to move relatively consistently to the put option. Obligations under futures contracts so covered will not be considered senior securities for purposes of a Fund’s investment restriction concerning senior securities.

The primary risks associated with the use of futures contracts are imperfect correlation between movements in the price of the futures and the market value of the underlying securities, and the possibility of an illiquid market for a futures contract. Although each Fund intends to sell futures contracts only if there is an active market for such contracts, no assurance can be given that a liquid market will exist for any particular contract at any particular time. Many futures exchanges and boards of trade limit the amount of fluctuation permitted in futures contract prices during a single trading day. Once the daily limit has been reached in a particular contract, no trades may be made that day at a price beyond that limit or trading may be suspended for specified periods during the day. Futures contract prices could move to the limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of futures positions and potentially subjecting a Fund to substantial losses. If trading is not possible, or if a Fund determines not to close a futures position in anticipation of adverse price movements, the Fund will be required to make daily cash payments of variation margin. The risk that the Fund will be unable to close out a futures position will be minimized by entering into such transactions on a national securities exchange with an active and liquid secondary market. In addition, although the counterparty to a futures contract is often a clearing organization, backed by a group of financial institutions, there may be instances in which the counterparty could fail to perform its obligations, causing significant losses to a Fund.

Currently, registered investment companies may engage in unlimited futures transactions and options thereon provided that the investment advisor to the company claims an exclusion from regulation as a commodity pool operator. In connection with its management of the Trust, the Advisor has claimed such an exclusion from registration as a commodity pool operator and commodity trading adviser under the Commodity Exchange Act (the “CEA”). Therefore, neither the Trust nor the Advisor is subject to the registration and regulatory requirements of the CEA. Thus, currently, there are no limitations on the extent to which each Fund may engage in transactions involving futures and options thereon, except as set forth in the Prospectuses and this SAI. On February 9, 2012, the CFTC adopted amendments to its rules that will likely affect the Advisor and certain Funds’ abilities to continue to claim this exclusion after December 31, 2012. If a Fund were no longer able to claim the exclusion, the Advisor would be required to register as a “commodity pool operator” and “commodity trading advisor”, and certain Funds and the Advisor would be subject to regulation under the CEA. These amendments may affect the ability of the Funds to use futures contracts, options on futures contracts or commodities (as well as swap agreements) and may substantially increase regulatory compliance costs for the Advisor and the Funds. As of the date of this SAI, the ultimate impact of the CFTC amendments on the Funds is uncertain. It is possible, however, that the amendments may adversely affect the Advisor’s ability to manage the Funds, may impair the Funds’ ability to achieve their investment objective and/or may result in reduced returns to Fund investors.

6

Table of Contents

Forward Contracts (not applicable to the Global Fixed Income ProShares Funds)

The Funds may enter into forward contracts to attempt to gain exposure to an index or asset without actually purchasing such asset, or to hedge a position. Forward contracts are two-party contracts pursuant to which one party agrees to pay the counterparty a fixed price for an agreed-upon amount of an underlying asset or the cash value of the underlying asset at an agreed-upon date. When required by law, a Fund will segregate liquid assets in an amount equal to the value of the Fund’s total assets committed to the consummation of such forward contracts. Obligations under forward contracts so covered will not be considered senior securities for purposes of a Fund’s investment restriction concerning senior securities. Forward contracts with terms greater than seven days may be considered to be illiquid for purposes of the Fund’s illiquid investment limitations. A Fund will not enter into a forward contract unless the Advisor believes that the other party to the transaction is creditworthy. A Fund bears the risk of loss of the amount expected to be received under a forward contract in the event of the default or bankruptcy of a counterparty. If such a default occurs, a Fund will have contractual remedies pursuant to the forward contract, but such remedies may be subject to bankruptcy and insolvency laws, which could affect the Fund’s rights as a creditor.

Forward Currency Contracts (not applicable to the Global Fixed Income ProShares Funds)

The Funds may invest in forward currency contracts for investment or risk management purposes. A forward currency contract is an obligation to buy or sell a specific currency at a future date, which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. These contracts are entered into on the interbank market conducted directly between currency traders (usually large commercial banks) and their customers.

The Funds may invest in a combination of forward currency contracts and U.S. dollar-denominated market instruments in an attempt to obtain an investment result that is substantially the same as a direct investment in a foreign currency-denominated instrument. This investment technique creates a “synthetic” position in the particular foreign currency instrument whose performance the manager is trying to duplicate. For example, investing in a combination of U.S. dollar-denominated instruments with “long” forward currency exchange contracts creates a position economically equivalent to investing in a money market instrument denominated in the foreign currency itself. Such combined positions are sometimes necessary when the money market in a particular foreign currency is small or relatively illiquid.

For hedging purposes, the Funds may invest in forward currency contracts to hedge either specific transactions (transaction hedging) or portfolio positions (position hedging). Transaction hedging is the purchase or sale of forward currency contracts with respect to specific receivables or payables of the Funds in connection with the purchase and sale of portfolio securities. Position hedging is the sale of a forward currency contract on a particular currency with respect to portfolio positions denominated or quoted in that currency.

The Funds are not required to enter into forward currency contracts for hedging purposes. It is possible, under certain circumstances, that the Fund may have to limit its currency transactions to qualify as a “regulated investment company” under the Internal Revenue Code. The Funds do not intend to enter into a forward currency contract with a term of more than one year, or to engage in position hedging with respect to the currency of a particular country to more than the aggregate market value (at the time the hedging transaction is entered into) of their portfolio securities denominated in (or quoted in or currently convertible into or directly related through the use of forward currency contracts in conjunction with money market instruments to) that particular currency.

At or before the maturity of a forward currency contract, the Funds may either sell a portfolio security and make delivery of the currency, or retain the security and terminate its contractual obligation to deliver the currency by buying an “offsetting” contract obligating them to buy, on the same maturity date, the same amount of the currency. If the Fund engages in an offsetting transaction, it may later enter into a new forward currency contract to sell the currency.

If the Funds engage in offsetting transactions, the Funds will incur a gain or loss, to the extent that there has been movement in forward currency contract prices. If forward prices go down during the period between the date a Fund enters into a forward currency contract for the sale of a currency and the date it enters into an offsetting contract for the purchase of the currency, the Fund will realize a gain to the extent that the price of the currency it has agreed to sell exceeds the price of the currency it has agreed to buy. If forward prices go up, the Fund will suffer a loss to the extent the price of the currency it has agreed to buy exceeds the price of the currency it has agreed to sell.

Because the Fund invests in cash instruments denominated in foreign currencies, it may hold foreign currencies pending investment or conversion into U.S. dollars. Although the Fund values its assets daily in U.S. dollars, it does not convert its holdings of foreign currencies into U.S. dollars on a daily basis. The Fund will convert its holdings from time to time, however, and incur the costs of currency conversion. Foreign exchange dealers do not charge a fee for conversion,

7

Table of Contents

but they do realize a profit based on the difference between the prices at which they buy and sell various currencies. Thus, a dealer may offer to sell a foreign currency to the Fund at one rate, and offer to buy the currency at a lower rate if the Fund tries to resell the currency to the dealer.

Although forward currency contracts may be used by the Funds to try to manage currency exchange risks, unanticipated changes in currency exchange rates could result in poorer performance than if a Fund had not entered into these transactions. Even if the Advisor correctly predicts currency exchange rate movements, a hedge could be unsuccessful if changes in the value of a Fund’s futures position do not correspond to changes in the value of the currency in which its investments are denominated. This lack of correlation between a Fund’s forwards and currency positions may be caused by differences between the futures and currency markets.

These transactions also involve the risk that a Fund may lose its margin deposits or collateral and may be unable to realize the positive value, if any, of its position if a bank or broker with whom the Fund has an open forward position defaults or becomes bankrupt.

Options (not applicable to the Global Fixed Income ProShares)

Each Fund may buy and write (sell) options for the purpose of realizing its investment objective. By buying a call option, a Fund has the right, in return for a premium paid during the term of the option, to buy the asset underlying the option at the exercise price. By writing a call option a Fund becomes obligated during the term of the option to sell the asset underlying the option at the exercise price if the option is exercised. By buying a put option, a Fund has the right, in return for a premium paid during the term of the option, to sell the asset underlying the option at the exercise price. By writing a put option, a Fund becomes obligated during the term of the option to purchase the asset underlying the option at the exercise price if the option is exercised. During the term of the option, the writer may be assigned an exercise notice by the broker-dealer through whom the option was sold. The exercise notice would require the writer to deliver, in the case of a call, or take delivery of, in the case of a put, the underlying asset against payment of the exercise price. This obligation terminates upon expiration of the option, or at such earlier time that the writer effects a closing purchase transaction by purchasing an option covering the same underlying asset and having the same exercise price and expiration date as the one previously sold. Once an option has been exercised, the writer may not execute a closing purchase transaction. To secure the obligation to deliver the underlying asset in the case of a call option, the writer of a call option is required to deposit in escrow the underlying asset or other assets in accordance with the rules of the Options Clearing Corporation (the “OCC”), an institution created to interpose itself between buyers and sellers of options. The OCC assumes the other side of every purchase and sale transaction on an exchange and, by doing so, gives its guarantee to the transaction. When writing call options on an asset, a Fund may cover its position by owning the underlying asset on which the option is written. Alternatively, the Fund may cover its position by owning a call option on the underlying asset, on a share-for-share basis, which is deliverable under the option contract at a price no higher than the exercise price of the call option written by the Fund or, if higher, by owning such call option and depositing and segregating cash or liquid instruments equal in value to the difference between the two exercise prices. In addition, a Fund may cover its position by segregating cash or liquid instruments equal in value to the exercise price of the call option written by the Fund. When a Fund writes a put option, the Fund will segregate with its custodian bank cash or liquid instruments having a value equal to the exercise value of the option. The principal reason for a Fund to write call options on assets held by the Fund is to attempt to realize, through the receipt of premiums, a greater return than would be realized on the underlying assets alone.

If a Fund that writes an option wishes to terminate the Fund’s obligation, the Fund may effect a “closing purchase transaction.” The Fund accomplishes this by buying an option of the same series as the option previously written by the Fund. The effect of the purchase is that the writer’s position will be canceled by the OCC. However, a writer may not effect a closing purchase transaction after the writer has been notified of the exercise of an option. Likewise, a Fund which is the holder of an option may liquidate its position by effecting a “closing sale transaction.” The Fund accomplishes this by selling an option of the same series as the option previously purchased by the Fund. There is no guarantee that either a closing purchase or a closing sale transaction can be effected. If any call or put option is not exercised or sold, the option will become worthless on its expiration date. A Fund will realize a gain (or a loss) on a closing purchase transaction with respect to a call or a put option previously written by the Fund if the premium, plus commission costs, paid by the Fund to purchase the call or put option to close the transaction is less (or greater) than the premium, less commission costs, received by the Fund on the sale of the call or the put option. The Fund also will realize a gain if a call or put option which the Fund has written lapses unexercised, because the Fund would retain the premium.

Although certain securities exchanges attempt to provide continuously liquid markets in which holders and writers of options can close out their positions at any time prior to the expiration of the option, no assurance can be given that a market will exist at all times for all outstanding options purchased or sold by a Fund. If an options market were to become unavailable, the Fund would be unable to realize its profits or limit its losses until the Fund could exercise options it holds, and the Fund would remain obligated until options it wrote were exercised or expired. Reasons for the absence of liquid secondary market on an exchange include the following: (i) there may be insufficient trading interest in certain options;

8

Table of Contents

(ii) restrictions may be imposed by an exchange on opening or closing transactions or both; (iii) trading halts, suspensions or other restrictions may be imposed with respect to particular classes or series of options; (iv) unusual or unforeseen circumstances may interrupt normal operations on an exchange; (v) the facilities of an exchange or the OCC may not at all times be adequate to handle current trading volume; or (vi) one or more exchanges could, for economic or other reasons, decide or be compelled at some future date to discontinue the trading of options (or a particular class or series of options) and those options would cease to exist, although outstanding options on that exchange that had been issued by the OCC as a result of trades on that exchange would continue to be exercisable in accordance with their terms.

Index Options (not applicable to the Global Fixed Income ProShares)

The Funds may purchase and write options on indexes to create investment exposure consistent with their investment objectives, to hedge or limit the exposure of their positions, or to create synthetic money market positions.

An index fluctuates with changes in the values of the assets included in the index. Options on indexes give the holder the right to receive an amount of cash upon exercise of the option. Receipt of this cash amount will depend upon the closing level of the index upon which the option is based being greater than (in the case of a call) or less than (in the case of a put) the level at which the exercise price of the option is set. The amount of cash received, if any, will be the difference between the closing level of the index and the exercise price of the option, multiplied by a specified dollar multiple. The writer (seller) of the option is obligated, in return for the premiums received from the purchaser of the option, to make delivery of this amount to the purchaser. All settlements of index options transactions are in cash.

Index options are subject to substantial risks, including the risk of imperfect correlation between the option price and the value of the underlying assets composing the index selected and the risk that there might not be a liquid secondary market for the option. Because the value of an index option depends upon movements in the level of the index rather than the price of a particular asset, whether a Fund will realize a gain or loss from the purchase or writing (sale) of options on an index depends upon movements in the level of prices for specific underlying assets generally or, in the case of certain indexes, in an industry or market segment. A Fund will not enter into an option position that exposes the Fund to an obligation to another party, unless the Fund either (i) owns an offsetting position in the underlying securities or other options and/or (ii) earmarks or segregates with the Fund’s custodian bank cash or liquid instruments that, when added to the premiums deposited with respect to the option, are equal to the market value of the underlying assets not otherwise covered.

Each Fund may engage in transactions in index options listed on national securities exchanges or traded in the OTC market as an investment vehicle for the purpose of realizing the Fund’s investment objective. The exercising holder of an index option receives, instead of the asset, cash equal to the difference between the closing level of the index and the exercise price of the option. Some index options are based on a broad market index such as the S&P 500 ^® , the New York Stock Exchange, Inc. (“NYSE”) Composite Index or on a narrower index such as the Philadelphia Stock Exchange Over-the-Counter Index. Options currently are traded on the Chicago Board Options Exchange and other exchanges (“Options Exchanges”). Purchased OTC options and the cover for written OTC options will be subject to the relevant Fund’s 15% limitation on investment in illiquid securities. See “Illiquid Securities” below. When required by law, a Fund will segregate liquid assets in an amount equal to the value of the Fund’s total assets committed to the consummation of such options. Obligations under options so covered will not be considered senior securities for purposes of a Fund’s investment restriction concerning senior securities.

Each of the Options Exchanges has established limitations governing the maximum number of call or put options on the same index which may be bought or written (sold) by a single investor, whether acting alone or in concert with others (regardless of whether such options are written on the same or different Options Exchanges or are held or written on one or more accounts or through one or more brokers). Under these limitations, option positions of all investment companies advised by the same investment advisor are combined for purposes of these limits. Pursuant to these limitations, an Options Exchange may order the liquidation of positions and may impose other sanctions or restrictions. These position limits may restrict the number of listed options which a Fund may buy or sell. The Advisor intends to comply with all limitations.

Swap Agreements (not applicable to the Global Fixed Income ProShares)

The Funds may enter into swap agreements for purposes of attempting to gain exposure to an underlying asset without actually purchasing such asset, or to hedge a position. Swap agreements are two-party contracts entered into primarily by institutional investors for periods ranging from a day to more than one year. In a standard “swap” transaction, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on particular predetermined investments or instruments. The gross return to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount,” for example, the return on or increase in value of a particular dollar amount invested in a “basket” of securities or an ETF representing a particular index or group of securities. Other forms of swap agreements

9

Table of Contents

include: interest rate caps, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates exceed a specified rate, or “cap”; interest rate floors, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates fall below a specified level, or “floor”; and interest rate collars, under which a party sells a cap and purchases a floor or vice versa in an attempt to protect itself against interest rate movements exceeding given minimum or maximum levels.

Most swap agreements entered into by a Fund calculate and settle the obligations of the parties to the agreement on a “net basis” with a single payment. Consequently, a Fund’s current obligations (or rights) under a swap agreement will generally be equal only to the net amount to be paid or received under the agreement based on the relative values of the positions held by each party to the agreement (the “net amount”).

A Fund’s current obligations under a swap agreement will be accrued daily (offset against any amounts owed to the Fund) and any accrued but unpaid net amounts owed to a swap counterparty will be covered by segregating or earmarking cash or other assets determined to be liquid, but typically no payments will be made until the settlement date. Swap agreements with terms greater than seven days may be considered to be illiquid for purposes of the Fund’s illiquid investment limitations. A Fund will not enter into any swap agreement unless the Advisor believes that the other party to the transaction is creditworthy. The counterparty to any swap agreement will typically be a major global financial institution. A Fund bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. If such a default occurs, a Fund will have contractual remedies pursuant to the swap agreements, but such remedies may be subject to bankruptcy and insolvency laws that could affect the Fund’s right as a creditor.

Each Fund may enter into swap agreements to invest in a market without owning or taking physical custody of securities in circumstances in which direct investment is restricted for legal reasons or is otherwise impracticable. On a long swap, the counterparty will generally agree to pay the Fund the amount, if any, by which the notional amount of the swap agreement would have increased in value had it been invested in the particular underlying assets (e.g., securities comprising the relevant index), plus an amount equal to any dividends or interest that would have been received on those assets. The Fund will agree to pay to the counterparty an amount equal to a floating rate of interest on the notional amount of the swap agreement plus the amount, if any, by which the notional amount would have decreased in value had it been invested in such assets plus, in certain instances, commissions or trading spreads on the notional amount. Therefore, the return to the Fund on such swap agreements should be the gain or loss on the notional amount plus dividends or interest on the assets less the interest paid by the Fund on the notional amount. As a trading technique, the Advisor may substitute physical securities with a swap agreement having risk characteristics substantially similar to the underlying securities.

As noted above, swap agreements typically are settled on a net basis, which means that the two payment streams are netted out, with the Fund receiving or paying, as the case may be, only the net amount of the two payments. Payments may be made at the conclusion of a swap agreement or periodically during its term. The timing and character of any income, gain or loss recognized by a Fund on the payment or payments made or received on a swap will vary depending upon the terms of the particular swap. Swap agreements do not involve the delivery of securities or other underlying assets. Accordingly, the risk of loss with respect to swap agreements is limited to the net amount of payments that a Fund is contractually obligated to make. If the other party to a swap agreement defaults, a Fund’s risk of loss consists of the net amount of payments that such Fund is contractually entitled to receive, if any. The net amount of the excess, if any, of a Fund’s obligations over its entitlements with respect to each equity swap will be accrued on a daily basis and an amount of cash or liquid assets, having an aggregate NAV at least equal to such accrued excess will be earmarked or segregated by a Fund’s custodian. Inasmuch as these transactions are entered into for hedging purposes or are offset by earmarked or segregated cash or liquid assets, as permitted by applicable law, the Funds and their Advisor believe that these transactions do not constitute senior securities within the meaning of the 1940 Act, and, accordingly, will not treat them as being subject to a Fund’s borrowing restrictions.

In the normal course of business, a Fund enters into standardized contracts created by the International Swaps and Derivatives Association, Inc. (“ISDA agreements”) with certain counterparties for derivative transactions. These agreements contain, among other conditions, events of default and termination events, and various covenants and representations. Certain of the Fund’s ISDA agreements contain provisions that require the Fund to maintain a predetermined level of net assets, and/or provide limits regarding the decline of the Fund’s NAV over specific periods of time, which may or may not be exclusive of redemptions. If the Fund were to trigger such provisions and have open derivative positions, at that time counterparties to the ISDA agreements could elect to terminate such ISDA agreements and request immediate payment in an amount equal to the net liability positions, if any, under the relevant ISDA agreement. Pursuant to the terms of its ISDA agreements, the Fund will have already collateralized its liability under such agreements, in some cases only in excess of certain threshold amounts. The Funds seek to mitigate risks by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, in an amount approximately equal to what the counterparty owes the Fund subject to certain minimum thresholds, although

10

Table of Contents

the Funds may not always be successful. To the extent any such collateral is insufficient or there are delays in accessing the collateral, the Funds will be exposed to the risks described above, including possible delays in recovering amounts as a result of bankruptcy proceedings.

The use of swaps is a highly specialized activity which involves investment techniques and risks in addition to, and in some cases different from, those associated with ordinary portfolio securities transactions. The primary risks associated with the use of swap agreements are mispricing or improper valuation, imperfect correlation between movements in the notional amount and the price of the underlying investments, and the inability of counterparties to perform. The Advisor, under the supervision of the Board of Trustees, is responsible for determining and monitoring the liquidity of the Funds’ transactions in swap agreements.

Currently, the Advisor has claimed an exclusion from registration as a commodity pool operator and commodity trading adviser under the CEA. On February 9, 2012, the CFTC adopted amendments to its rules that will likely affect the Advisor and certain Funds’ abilities to continue to claim this exclusion after December 31, 2012. If a Fund were no longer able to claim the exclusion, the Advisor would be required to register as a “commodity pool operator” and “commodity trading advisor”, and certain Funds and the Advisor would be subject to regulation under the CEA. In addition, the CFTC, in conjuction with other federal regulators, also recently proposed stricter margin requirements for certain swap transactions. If adopted, the proposed requirements could increase the amount of margin necessary to conduct many swap transactions, limit the types of assets that can be used as collateral for such transactions, and impose other restrictions. The CFTC amendments and/or the rule proposals may affect the ability of the Funds to use swap agreements (as well as futures contracts and options on futures contracts or commodities) and may substantially increase regulatory compliance costs for the Advisor and the Funds. As of the date of this SAI, the ultimate impact of the CFTC amendments and/or the rule proposals on the Funds is uncertain. It is possible, however, that the amendments and/or the rule proposals may adversely affect the Advisor’s ability to manage the Funds, may impair the Funds’ ability to achieve their investment objective and/or may result in reduced returns to Fund investors.

When-Issued and Delayed-Delivery Securities

Each Fund, from time to time, in the ordinary course of business, may purchase securities on a when-issued or delayed-delivery basis (i.e., delivery and payment can take place between a month and 120 days after the date of the transaction). These securities are subject to market fluctuations and no interest accrues to the purchaser during this period. At the time a Fund makes the commitment to purchase securities on a when-issued or delayed-delivery basis, the Fund will record the transaction and thereafter reflect the value of the securities, each day, in determining the Fund’s NAV. Each Fund will not purchase securities on a when-issued or delayed-delivery basis if, as a result, it determines that more than 15% of the Fund’s net assets would be invested in illiquid securities. At the time of delivery of the securities, the value of the securities may be more or less than the purchase price.

The Trust will earmark or segregate with the Trust’s custodian bank cash or liquid instruments equal to or greater in value than the Fund’s purchase commitments for such when-issued or delayed-delivery securities, or when the Trust does not believe that a Fund’s NAV or income will be adversely affected by the Fund’s purchase of securities on a when-issued or delayed-delivery basis. Because a Fund will identify cash or liquid securities to satisfy its purchase commitments in the manner described, a Fund’s liquidity and the ability of the Advisor to manage a Fund might be affected in the event its commitments to purchase when-issued or delayed-delivery securities exceeds 40% of the value of its assets.

Investments in Other Investment Companies (not applicable to the Global Fixed Income and the Inflation and Volatility ProShares)

The Funds may invest in the securities of other investment companies, including ETFs, to the extent that such an investment would be consistent with the requirements of the 1940 Act or any exemptive order issued by the SEC. If a Fund invests in, and, thus, is a shareholder of, another investment company, the Fund’s shareholders will indirectly bear the Fund’s proportionate share of the fees and expenses paid by such other investment company, including advisory fees, in addition to both the management fees payable directly by the Fund to the Fund’s own investment advisor and the other expenses that the Fund bears directly in connection with the Fund’s own operations.

Because most ETFs are investment companies, absent exemptive relief, investments in such funds generally would be limited under applicable federal statutory provisions. Those provisions restrict a fund’s investment in the shares of another investment company to up to 5% of its assets (which may represent no more than 3% of the securities of such other investment company) and limit aggregate investments in all investment companies to 10% of assets. A Fund may invest in certain ETFs in excess of the statutory limit in reliance on an exemptive order issued by the SEC to those entities and pursuant to procedures approved by the Board provided that the Fund complies with the conditions of the exemptive relief, as they may be amended from time to time, and any other applicable investment limitations.

11

Table of Contents

Real Estate Investment Trusts (not applicable to the Global Fixed Income and the Inflation and Volatility ProShares)

Each Fund may invest in real estate investment trusts (“REITs”). Equity REITs invest primarily in real property while mortgage REITs invest in construction, development and long-term mortgage loans. Their value may be affected by changes in the value of the underlying property of the REIT, the creditworthiness of the issuer, property taxes, interest rates, and tax and regulatory requirements, such as those relating to the environment. REITs are dependent upon management skill, are not diversified and are subject to heavy cash flow dependency, default by borrowers, self-liquidation and the possibility of failing to qualify for tax-free pass-through of income under the Code and failing to maintain exempt status under the 1940 Act.

Illiquid Securities

Each Fund may purchase illiquid securities, including securities that are not readily marketable and securities that are not registered (“restricted securities”) under the 1933 Act, but which can be sold to qualified institutional buyers under Rule 144A under the Securities Act of 1933 (the “1933 Act”). A Fund will not invest more than 15% of the Fund’s net assets in illiquid securities. The term “illiquid securities” for this purpose means securities that cannot be disposed of within seven days in the ordinary course of business at approximately the amount at which the Fund has valued the securities. Under the current guidelines of the staff of the SEC, illiquid securities also are considered to include, among other securities, purchased OTC options, certain cover for OTC options, repurchase agreements with maturities in excess of seven days, and certain securities whose disposition is restricted under the federal securities laws. The Fund may not be able to sell illiquid securities when the Advisor considers it desirable to do so or may have to sell such securities at a price that is lower than the price that could be obtained if the securities were more liquid. In addition, the sale of illiquid securities also may require more time and may result in higher dealer discounts and other selling expenses than the sale of securities that are not illiquid. Illiquid securities may be more difficult to value due to the unavailability of reliable market quotations for such securities, and investments in illiquid securities may have an adverse impact on NAV.

Institutional markets for restricted securities have developed as a result of the promulgation of Rule 144A under the 1933 Act, which provides a safe harbor from 1933 Act registration requirements for qualifying sales to institutional investors. When Rule 144A securities present an attractive investment opportunity and otherwise meet selection criteria, a Fund may make such investments. Whether or not such securities are illiquid depends on the market that exists for the particular security. The staff of the SEC has taken the position that the liquidity of Rule 144A restricted securities is a question of fact for a board of trustees to determine, such determination to be based on a consideration of the readily-available trading markets and the review of any contractual restrictions. The SEC staff also has acknowledged that, while a board of trustees retains ultimate responsibility, trustees may delegate this function to an investment adviser. The Board of Trustees has delegated this responsibility for determining the liquidity of Rule 144A restricted securities which may be invested in by a Fund to the Advisor. It is not possible to predict with assurance exactly how the market for Rule 144A restricted securities or any other security will develop. A security that when purchased had a fair degree of marketability may subsequently become illiquid and, accordingly, a security that was deemed to be liquid at the time of acquisition may subsequently become illiquid. In such event, appropriate remedies will be considered to minimize the effect on the Fund’s liquidity.

Debt Instruments

Below is a description of various types of money market instruments and other debt instruments that a Fund may utilize for investment purposes, as “cover” for other investment techniques such Fund employs, or for liquidity purposes. Other types of money market instruments and debt instruments may become available that are similar to those described below and in which the Funds also may invest consistent with their investment goals and policies.

Money Market Instruments

To seek its investment objective, as a cash reserve, for liquidity purposes, or as “cover” for positions it has taken, each Fund may invest all or part of its assets in cash or cash equivalents, which include, but are not limited to, short-term money market instruments, U.S. government securities, certificates of deposit, bankers acceptances or repurchase agreements secured by U.S. government securities. Each Fund may invest in money market instruments issued by foreign and domestic governments, financial institutions, corporations and other entities in the U.S. or in any foreign country.

U.S. Government Securities

The Funds may invest in U.S. government securities in pursuit of their investment objectives, as “cover” for the investment techniques these Funds employ, or for liquidity purposes.

12

Table of Contents

U.S. government securities include U.S. Treasury securities, which are backed by the full faith and credit of the U.S. Treasury and which differ only in their interest rates, maturities, and times of issuance. U.S. Treasury bills have initial maturities of one year or less; U.S. Treasury notes have initial maturities of one to ten years; and U.S. Treasury bonds generally have initial maturities of greater than ten years. In addition, U.S. government securities include Treasury Inflation-Protected Securities (“TIPS”). TIPS are inflation protected public obligations of the U.S. Treasury. These securities are designed to provide inflation protection to investors. TIPS are income generating instruments whose interest and principal payments are adjusted for inflation – a sustained increase in prices that erodes the purchasing power of money. The inflation adjustment, which is typically applied monthly to the principal of the bond, follows a designated inflation index such as the Consumer Price Index. A fixed-coupon rate is applied to the inflation-adjusted principal so that as inflation rises, both the principal value and the interest payments increase. This can provide investors with a hedge against inflation, as it helps preserve the purchasing power of an investment. Because of the inflation-adjustment feature, inflation-protected bonds typically have lower yields than conventional fixed-rate bonds. In addition, TIPS decline in value when real interest rates rise. However, in certain interest rate environments, such as when real interest rates are rising faster than nominal interest rates, TIPS may experience greater losses than other fixed income securities with similar duration.

Certain U.S. government securities are issued or guaranteed by agencies or instrumentalities of the U.S. government including, but not limited to, obligations of U.S. government agencies or instrumentalities, such as the Federal National Mortgage Association (“Fannie Mae” or “FNMA”), the Government National Mortgage Association (“Ginnie Mae” or “GNMA”), the Small Business Administration, the Federal Farm Credit Administration, the Federal Home Loan Banks, Banks for Cooperatives (including the Central Bank for Cooperatives), the Federal Land Banks, the Federal Intermediate Credit Banks, the Tennessee Valley Authority, the Export-Import Bank of the United States, the Commodity Credit Corporation, the Federal Financing Bank, the Student Loan Marketing Association, the National Credit Union Administration and the Federal Agricultural Mortgage Corporation. Some obligations issued or guaranteed by U.S. government agencies and instrumentalities, including, for example, GNMA pass-through certificates, are supported by the full faith and credit of the U.S. Treasury. On September 7, 2008, FNMA and the Federal Home Loan Mortgage Corporation (“Freddie Mac” or “FHLMC”), a similar U.S. government instrumentality, were placed into conservatorship by their new regulator, the Federal Housing Finance Agency. Simultaneously, the U.S. Treasury made a commitment of indefinite duration to maintain the positive net worth of both entities. No assurance can be given that the initiatives discussed above with respect to the debt and mortgage-backed securities issued by FNMA and FHLMC will be successful. Other obligations issued by or guaranteed by federal agencies, such as those securities issued by FNMA, are supported by the discretionary authority of the U.S. government to purchase certain obligations of the federal agency but are not backed by the full faith and credit of the U.S. government, while other obligations issued by or guaranteed by federal agencies, such as those of the Federal Home Loan Banks, are supported by the right of the issuer to borrow from the U.S. Treasury. While the U.S. government provides financial support to such U.S. government-sponsored federal agencies, no assurance can be given that the U.S. government will always do so, since the U.S. government is not so obligated by law. U.S. Treasury notes and bonds typically pay coupon interest semi-annually and repay the principal at maturity. All U.S. government securities are subject to credit risk.

Yields on U.S. government securities depend on a variety of factors, including the general conditions of the money and bond markets, the size of a particular offering, and the maturity of the obligation. Debt securities with longer maturities tend to produce higher yields and are generally subject to potentially greater capital appreciation and depreciation than obligations with shorter maturities and lower yields. The market value of U.S. government securities generally varies inversely with changes in market interest rates. An increase in interest rates, therefore, would generally reduce the market value of a Fund’s portfolio investments in U.S. government securities, while a decline in interest rates would generally increase the market value of a Fund’s portfolio investments in these securities.

Repurchase Agreements

Each of the Funds may enter into repurchase agreements with financial institutions in pursuit of its investment objectives, as “cover” for the investment techniques it employs, or for liquidity purposes. Under a repurchase agreement, a Fund purchases a debt security and simultaneously agrees to sell the security back to the seller at a mutually agreed-upon future price and date, normally one day or a few days later. The resale price is greater than the purchase price, reflecting an agreed-upon market interest rate during the purchaser’s holding period. While the maturities of the underlying securities in repurchase transactions may be more than one year, the term of each repurchase agreement will always be less than one year. The Funds follow certain procedures designed to minimize the risks inherent in such agreements. These procedures include effecting repurchase transactions only with major global financial institutions. The creditworthiness of each of the firms that is a party to a repurchase agreement with the Funds will be monitored by the Advisor. In addition, the value of the collateral underlying the repurchase agreement will always be at least equal to the repurchase price, including any accrued interest earned on the repurchase agreement. In the event of a default or bankruptcy by a selling financial institution, a Fund will seek to liquidate such collateral which could involve certain costs or delays and, to the extent that proceeds from any sale upon a default of the obligation to repurchase were less than the repurchase price, the Fund could

13

Table of Contents

suffer a loss. A Fund also may experience difficulties and incur certain costs in exercising its rights to the collateral and may lose the interest the Fund expected to receive under the repurchase agreement. Repurchase agreements usually are for short periods, such as one week or less, but may be longer. It is the current policy of the Funds not to invest in repurchase agreements that do not mature within seven days if any such investment, together with any other illiquid assets held by the Fund, amounts to more than 15% of the Fund’s total net assets. The investments of each of the Funds in repurchase agreements at times may be substantial when, in the view of ProShare Advisors, liquidity, investment, regulatory, or other considerations so warrant.

Other Fixed Income Securities

Each Fund may invest in a wide range of fixed income securities, which may include foreign sovereign, sub-sovereign and supranational bonds, as well as any other obligations of any rating or maturity such as foreign and domestic investment grade corporate debt securities and lower-rated corporate debt securities (commonly known as “junk bonds”). Lower-rated or high yield debt securities include corporate high yield debt securities, zero-coupon securities, payment-in-kind securities, and STRIPS. Investment grade corporate bonds are those rated BBB or better by Stand & Poor’s Rating Group (“S&P”) or Baa or better by Moody’s Investor Services (“Moody’s”). Securities rated BBB by S&P are considered investment grade, but Moody’s considers securities rated Baa to have speculative characteristics. The Funds may also invest in unrated securities.

FOREIGN SOVEREIGN, SUB-SOVEREIGN AND SUPRANATIONAL SECURITIES (not applicable to the USD Covered Bond). The Funds may invest in fixed-rate debt securities issued by non-U.S. governments (foreign sovereign bonds), local governments, entities or agencies of non-U.S. country (foreign sub-sovereign bonds) as well as by two or more central governments or institutions (supranational bonds). These types of debt securities are typically general obligations of the issuer and are typically guaranteed by such issuer. Despite this guarantee, such debt securities are subject to default, restructuring or changes to the terms of the debt to the detriment of security holders. Such an event impacting a security held by a Fund would likely have an adverse impact on the Fund’s returns. Also, due to demand from other investors, certain types of these debt securities may be less accessible to the capital markets and may be difficult for a Fund to source. This may cause a Fund, at times, to pay a premium to obtain such securities for its own portfolio. For more information related to foreign sovereign, sub-sovereign and supranational securities, see “Foreign Securities” and “Exposure to Securities or Issuers in Specific Foreign Countries or Regions” above.

CORPORATE DEBT SECURITIES (not applicable to the Global Fixed Income ProShares). Corporate debt securities are fixed income securities issued by businesses to finance their operations, although corporate debt instruments may also include bank loans to companies. Notes, bonds, debentures and commercial paper are the most common types of corporate debt securities, with the primary difference being their maturities and secured or unsecured status. Commercial paper has the shortest term and is usually unsecured. The broad category of corporate debt securities includes debt issued by domestic or foreign companies of all kinds, including those with small-, mid- and large-capitalizations. Corporate debt may be rated investment-grade or below investment-grade and may carry variable or floating rates of interest.

Because of the wide range of types and maturities of corporate debt securities, as well as the range of creditworthiness of its issuers, corporate debt securities have widely varying potentials for return and risk profiles. For example, commercial paper issued by a large established domestic corporation that is rated investment-grade may have a modest return on principal, but carries relatively limited risk. On the other hand, a long-term corporate note issued by a small foreign corporation from an emerging market country that has not been rated may have the potential for relatively large returns on principal, but carries a relatively high degree of risk.

Corporate debt securities carry both credit risk and interest rate risk. Credit risk is the risk that a Fund could lose money if the issuer of a corporate debt security is unable to pay interest or repay principal when it is due. Some corporate debt securities that are rated below investment-grade are generally considered speculative because they present a greater risk of loss, including default, than higher quality debt securities. The credit risk of a particular issuer’s debt security may vary based on its priority for repayment. For example, higher ranking (senior) debt securities have a higher priority than lower ranking (subordinated) securities. This means that the issuer might not make payments on subordinated securities while continuing to make payments on senior securities. In addition, in the event of bankruptcy, holders of higher-ranking senior securities may receive amounts otherwise payable to the holders of more junior securities. Interest rate risk is the risk that the value of certain corporate debt securities will tend to fall when interest rates rise. In general, corporate debt securities with longer terms tend to fall more in value when interest rates rise than corporate debt securities with shorter terms.

JUNK BONDS. “Junk Bonds” generally offer a higher current yield than that available for higher-grade issues. However, lower-rated securities involve higher risks, in that they are especially subject to adverse changes in general economic conditions and in the industries in which the issuers are engaged, to changes in the financial condition of the issuers and to price fluctuations in response to changes in interest rates. During periods of economic downturn or rising interest rates, highly leveraged issuers may experience financial stress that could adversely affect their ability to make payments of interest and principal and increase the possibility of default. In addition, the market for lower-rated debt securities has

14

Table of Contents

expanded rapidly in recent years, and its growth paralleled a long economic expansion. At times in recent years, the prices of many lower-rated debt securities declined substantially, reflecting an expectation that many issuers of such securities might experience financial difficulties. As a result, the yields on lower-rated debt securities rose dramatically, but such higher yields did not reflect the value of the income stream that holders of such securities expected, but rather, the risk that holders of such securities could lose a substantial portion of their value as a result of the issuers’ financial restructuring or default. There can be no assurance that such declines will not recur. The market for lower-rated debt issues generally is thinner and less active than that for higher quality securities, which may limit each Fund’s ability to sell such securities at fair value in response to changes in the economy or financial markets. Adverse publicity and investor perceptions, whether or not based on fundamental analysis, may also decrease the values and liquidity of lower-rated securities, especially in a thinly traded market. Changes by recognized rating services in their rating of a fixed income security may affect the value of these investments. Each Fund will not necessarily dispose of a security when its rating is reduced below its rating at the time of purchase. However, the Advisor will monitor the investment to determine whether continued investment in the security will assist in meeting each Fund’s investment objective.

UNRATED DEBT SECURITIES (not applicable to the Global Fixed Income ProShares). The Funds may also invest in unrated debt securities. Unrated debt, while not necessarily lower in quality than rated securities, may not have as broad a market. Because of the size and perceived demand for the issue, among other factors, certain issuers may decide not to pay the cost of getting a rating for their bonds. The creditworthiness of the issuer, as well as any financial institution or other party responsible for payments on the security, will be analyzed to determine whether to purchase unrated bonds.

COVERED BONDS  (not applicable to the German Sovereign / Sub-Sovereign ETF). The Funds may invest in covered bonds, which are debt securities issued by banks or other credit institutions that are backed by both the issuing institution and underlying pool of assets that compose the bond (a “cover pool”). The cover pool for a covered bond is typically composed of residential or commercial mortgage loans or loans to public sector institutions. A covered bond may lose value if the credit rating of the issuing bank or credit institution is downgraded or the quality of the assets in the cover pool deteriorates.

Reverse Repurchase Agreements

Each Fund may enter into reverse repurchase agreements as part of its investment strategy. Reverse repurchase agreements involve sales by a Fund of portfolio assets concurrently with an agreement by the Fund to repurchase the same assets at a later date at a fixed price. Generally, the effect of such a transaction is that a Fund can recover all or most of the cash invested in the portfolio securities involved during the term of the reverse repurchase agreement, while a Fund will be able to keep the interest income associated with those portfolio securities. Such transactions are advantageous only if the interest cost to a Fund of the reverse repurchase transaction is less than the cost of obtaining the cash otherwise. Opportunities to achieve this advantage may not always be available, and a Fund intends to use the reverse repurchase technique only when it will be to the Fund’s advantage to do so. A Fund will segregate with its custodian bank cash or liquid instruments equal in value to the Fund’s obligations in respect of reverse repurchase agreements.

Short Sales (not applicable to the Global Fixed Income ProShares)

The Funds may engage in short sales transactions. A short sale is a transaction in which a Fund sells a security it does not own in anticipation that the market price of that security will decline. To complete such a transaction, a Fund must borrow the security to make delivery to the buyer. The Fund is then obligated to replace the security borrowed by borrowing the same security from another lender, purchasing it at the market price at the time of replacement or paying the lender an amount equal to the cost of purchasing the security. The price at such time may be more or less than the price at which the security was sold by the Fund. Until the security is replaced, the Fund is required to repay the lender any dividends it receives, or interest which accrues, during the period of the loan. To borrow the security, the Fund also may be required to pay a premium, which would increase the cost of the security sold. The net proceeds of the short sale will be retained by the broker, to the extent necessary to meet the margin requirements, until the short position is closed out. A Fund also will incur transaction costs in effecting short sales.

The Funds may make short sales “against the box,” i.e., when a security identical to or convertible or exchangeable into one owned by a Fund is borrowed and sold short. Whenever a Fund engages in short sales, it earmarks or segregates liquid securities or cash in an amount that, when combined with the amount of collateral deposited with the broker in connection with the short sale, equals the current market value of the security sold short. The earmarked or segregated assets are marked-to-market daily.

A Fund will incur a loss as a result of a short sale if the price of the security increases between the date of the short sale and the date on which the Fund replaces the borrowed security. A Fund will realize a gain if the price of the security declines in price between those dates. The amount of any gain will be decreased, and the amount of any loss increased, by the amount of the premium, dividends or interest a Fund may be required to pay, if any, in connection with a short sale.

15

Table of Contents

The Short QQQ, UltraShort QQQ, UltraPro Short QQQ, Ultra QQQ and UltraPro QQQ Funds will not sell short the equity securities of issuers contained in the NASDAQ-100 Index. The Ultra and UltraShort Nasdaq Biotechnology Funds will not sell short the securities of issues contained in the Nasdaq Biotechnology Index.

Borrowing

Each Fund may borrow money for cash management purposes or investment purposes. Borrowing for investment is known as leveraging. Leveraging investments, by purchasing securities with borrowed money, is a speculative technique which increases investment risk, but also increases investment opportunity. Because substantially all of a Fund’s assets will fluctuate in value, whereas the interest obligations on borrowings may be fixed, the NAV per Share of the Fund will fluctuate more when the Fund is leveraging its investments than would otherwise be the case. Moreover, interest costs on borrowings may fluctuate with changing market rates of interest and may partially offset or exceed the returns on the borrowed funds. Under adverse conditions, a Fund might have to sell portfolio securities to meet interest or principal payments at a time when investment considerations would not favor such sales.

As required by the 1940 Act, each Fund must maintain continuous asset coverage (total assets, including assets acquired with borrowed funds, less liabilities exclusive of borrowings) of 300% of all amounts borrowed. If at any time the value of a Fund’s assets should fail to meet this 300% coverage test, the Fund, within three days (not including weekends and holidays), will reduce the amount of the Fund’s borrowings to the extent necessary to meet this 300% coverage requirement. Maintenance of this percentage limitation may result in the sale of portfolio securities at a time when investment considerations would not favor such sale. In addition to the foregoing, the Funds are authorized to borrow money as a temporary measure for extraordinary or emergency purposes in amounts not in excess of 5% of the value of each Fund’s total assets. This borrowing is not subject to the foregoing 300% asset coverage requirement. The Funds are authorized to pledge portfolio securities as ProShare Advisors deems appropriate in connection with any borrowings.

Each Fund may also enter into reverse repurchase agreements, which may be viewed as a form of borrowing, with financial institutions. However, under the current pronouncements, to the extent a Fund “covers” its repurchase obligations, such agreement will not be considered to be a “senior security” and, therefore, will not be subject to the 300% asset coverage requirement otherwise applicable to borrowings by that Fund.

Portfolio Turnover

A Fund’s portfolio turnover may vary from year to year, as well as within a year. The nature of the Funds may cause the Funds to experience substantial differences in brokerage commissions from year to year. High portfolio turnover and correspondingly greater brokerage commissions, to a great extent, depend on the purchase, redemption, and exchange activity of a Fund’s investors, as well as each Fund’s investment objective and strategies. The overall reasonableness of brokerage commissions is evaluated by ProShare Advisors based upon its knowledge of available information as to the general level of commissions paid by other institutional investors for comparable services. In addition, a Fund’s portfolio turnover level may adversely affect the ability of the Fund to achieve its investment objective. “Portfolio Turnover Rate” is defined under the rules of the SEC as the lesser of the value of the securities purchased or securities sold, excluding all securities whose maturities at time of acquisition were one year or less, divided by the average monthly value of such securities owned during the year. Based on this definition, instruments with remaining maturities of less than one year are excluded from the calculation of the Portfolio Turnover Rate. Instruments excluded from the calculation of portfolio turnover generally would include futures contracts, swap agreements and option contracts in which the Funds invest since such contracts generally have a remaining maturity of less than one year. ETFs, such as the Funds, may incur very low levels of portfolio turnover (or none at all in accordance with the SEC methodology described above) because of the way in which they operate and the way shares are created in Creation Units. However, a low or zero Portfolio Turnover Rate should not be assumed to be indicative of the amount of gains that a Fund may or may not distribute to shareholders, as the instruments excluded from the calculation described above may have generated taxable gains upon their sale or maturity. For those Funds that commenced operations prior to May 31, 2012, each such Fund’s turnover rate for the period from that Fund’s commencement of operations to May 31, 2012 is set forth in the Annual Report to shareholders. Annual Portfolio turnover rates are also shown in each Fund’s Prospectus.

SPECIAL CONSIDERATIONS

As discussed above and in the Prospectuses, the Funds present certain risks, some of which are further described below.

Tracking and Correlation

Several factors may affect a Fund’s ability to achieve a high degree of correlation within its Index. Among these factors are: (1) a Fund’s fees and expenses, including brokerage (which may be increased by high portfolio turnover) and

16

Table of Contents

the costs associated with the use of derivatives; (2) less than all of the securities in the index being held by a Fund and securities not included in the index being held by a Fund; (3) an imperfect correlation between the performance of instruments held by a Fund, such as futures contracts, and the performance of the underlying securities in the cash market; (4) bid-ask spreads (the effect of which may be increased by portfolio turnover); (5) holding instruments traded in a market that has become illiquid or disrupted; (6) a Fund’s Share prices being rounded to the nearest cent; (7) changes to the index that are not disseminated in advance; (8) the need to conform a Fund’s portfolio holdings to comply with investment restrictions or policies or regulatory or tax law requirements; (9) limit up or limit down trading halts on options or futures contracts which may prevent a Fund from purchasing or selling options or futures contracts; (10) early and unanticipated closings of the markets on which the holdings of a Fund trade, resulting in the inability of the Fund to execute intended portfolio transactions; and (11) fluctuations in currency exchange rates.

Furthermore, each Fund, except the Matching ProShares Funds, has an investment objective to match a multiple (2x or 3x), the inverse (-1x) or a multiple of the inverse (-2x or -3x) of the performance of an index on a single day. A “single day” is measured from the time the Fund calculates its NAV to the time of the Fund’s next NAV calculation. These Funds are subject to the correlation risks described above. In addition, while a close correlation of any Fund to its index may be achieved on any single trading day for certain Funds, over time, the cumulative percentage increase or decrease in the NAV of the Shares may diverge, in some cases significantly, from the cumulative percentage decrease or increase in the index due to a compounding effect as further described in the Prospectuses and below.

Leverage

Each Fund (except the Matching ProShares and the Short (-1x) ProShares Funds) intends to use, on a regular basis, leverage in pursuing its investment objectives. Leverage exists when a Fund achieves the right to a return on a capital base that exceeds the Fund’s assets. Utilization of leverage involves special risks and should be considered to be speculative. Specifically, leverage creates the potential for greater gains to Fund shareholders during favorable market conditions and the risk of magnified losses during adverse market conditions. Leverage is likely to cause higher volatility of the NAVs of these Funds’ Shares. Leverage may also involve the creation of a liability that does not entail any interest costs or the creation of a liability that requires the Fund to pay interest which would decrease the Fund’s total return to shareholders. If these Funds achieve their investment objectives, during adverse market conditions, shareholders should experience a loss greater than they would have incurred had these Funds not been leveraged.

• Special Note Regarding the Correlation Risks of Geared Funds (all Funds except the Matching ProShares Funds). As a result of compounding, for periods greater than one day, the use of leverage tends to cause the performance of a Fund to vary from its index’s performance times the stated multiple or inverse multiple in the Fund’s investment objective, before accounting for fees and fund expenses. Compounding affects all investments, but has a more significant impact on geared funds. Four factors significantly affect how close daily compounded returns are to longer-term index returns times the fund’s multiple: the length of the holding period, index volatility, whether the multiple is positive or inverse, and its leverage level. Longer holding periods, higher index volatility, inverse multiples and greater leverage each can lead to returns farther from the multiple times the index return. As the tables below show, particularly during periods of higher index volatility, compounding will cause longer term results to vary from the index performance times the stated multiple in the Fund’s investment objective. This effect becomes more pronounced as volatility increases.

A geared ProShares Fund’s return for periods longer than one day is primarily a function of the following:

The fund performance for a geared ProShares Fund can be estimated given any set of assumptions for the factors described above. The tables on the next five pages illustrate the impact of two factors, index volatility and index performance, on a geared fund. Index volatility is a statistical measure of the magnitude of fluctuations in the returns of an index and is calculated as the standard deviation of the natural logarithms of one plus the index return (calculated daily), multiplied by the square root of the number of trading days per year (assumed to be 252). The tables show estimated Fund returns for a number of combinations of index performance and index volatility over a one-year period. Assumptions used in the tables include: (a) no dividends paid with respect to securities included in the index; (b) no Fund expenses; and (c) borrowing/lending rates (to obtain leverage or inverse exposure) of zero percent. If Fund expenses and/or actual borrowing lending rates were reflected, the Fund’s performance would be different than shown.

17

Table of Contents

The first table below shows a performance example of an Ultra ProShares Fund (which have an investment objective to correspond to two times (2x) the daily performance of an index). The Ultra ProShares Fund could be expected to achieve a 20% return on a yearly basis if the index performance was 10%, absent any costs, the correlation risk or other factors described above and in the Prospectuses under “Correlation Risk” and “Compounding Risk.” However, as the table shows, with an index volatility of 20%, such a Fund would return 16.3%. In the charts below, areas shaded lighter represent those scenarios where a leveraged Fund with the investment objective described will return the same as or outperform (i.e., return more than) the index performance times the stated multiple in the Fund’s investment objective; conversely, areas shaded darker represent those scenarios where the Fund will underperform (i.e., return less than) the index performance times the stated multiple in the Fund’s investment objective.