MS-P Morgan Stanley

January 2025

Preliminary Pricing Supplement No. 5,661

Registration Statement Nos. 333-275587; 333-275587-01

Dated December 24, 2024

Filed pursuant to Rule 424(b)(2)

Morgan Stanley Finance LLC

Structured Investments

Opportunities in U.S. Equities

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Fully and Unconditionally Guaranteed by Morgan Stanley

Principal at Risk Securities

The Buffered Jump Securities, which we refer to as the securities, are unsecured obligations of Morgan Stanley Finance LLC (“MSFL”) and are fully and unconditionally guaranteed by Morgan Stanley. The securities have the terms described in the accompanying product supplement for Jump Securities, index supplement and prospectus, as supplemented and modified by this document. The securities pay no interest and will instead pay an amount in cash at maturity that may be greater than or less than the stated principal amount, depending on the closing values of the underlying indices on the valuation date. If the final index value of each underlying index is greater than or equal to its initial index value, you will receive the stated principal amount for each security that you hold at maturity plus the upside payment of at least $245 per security (to be determined on the pricing date). If the final index value of each underlying index declines by an amount less than or equal to the buffer amount of 20% over the term of the securities from its respective initial index value, the payment due at maturity will equal the stated principal amount. However, if the final index value of any underlying index is less than 80% of its respective initial index value, which we refer to as its respective downside threshold value, you will be exposed to the decline in the level of the worst performing underlying index beyond the buffer amount of 20%, and you will lose some or a significant portion of your initial investment. The payment at maturity may be significantly less than the stated principal amount, and you could lose up to 80% of your investment. Because the payment at maturity on the securities is based on the worst performing of the underlying indices, a decline in any final index value below 80% of its respective initial index value will result in a loss on your investment, even if the other underlying indices have appreciated or have not declined as much. The securities are for investors who seek an equity index-based return and who are willing to risk their principal, risk exposure to the worst performing of three underlying indices and forgo current income and returns above the fixed upside payment in exchange for the upside payment and buffer features that in each case apply to a limited range of performance of the worst performing underlying index. The securities are notes issued as part of MSFL’s Series A Global Medium-Term Notes Program.

All payments are subject to our credit risk. If we default on our obligations, you could lose some or all of your investment. These securities are not secured obligations and you will not have any security interest in, or otherwise have any access to, any underlying reference asset or assets.

(1)The securities will be sold only to investors purchasing the securities in fee-based advisory accounts.

(2)MS & Co. expects to sell all of the securities that it purchases from us to an unaffiliated dealer at a price of $ per security, for further sale to certain fee-based advisory accounts at the price to public of $1,000 per security. MS & Co. will not receive a sales commission with respect to the securities. See “Supplemental information regarding plan of distribution; conflicts of interest.” For additional information, see “Plan of Distribution (Conflicts of Interest)” in the accompanying product supplement for Jump Securities.

(3)See “Use of proceeds and hedging” on page 20.

The securities involve risks not associated with an investment in ordinary debt securities. See “Risk Factors” beginning on page 8.

The Securities and Exchange Commission and state securities regulators have not approved or disapproved these securities, or determined if this document or the accompanying product supplement, index supplement and prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The securities are not deposits or savings accounts and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency or instrumentality, nor are they obligations of, or guaranteed by, a bank.

You should read this document together with the related product supplement, index supplement and prospectus, each of which can be accessed via the hyperlinks below. When you read the accompanying product supplement and index supplement, please note that all references in such supplements to the prospectus dated November 16, 2023, or to any sections therein, should refer instead to the accompanying prospectus dated April 12, 2024 or to the corresponding sections of such prospectus, as applicable. Please also see “Additional Terms of the Securities” and “Additional Information About the Securities” at the end of this document.

References to “we,” “us” and “our” refer to Morgan Stanley or MSFL, or Morgan Stanley and MSFL collectively, as the context requires.

Product Supplement for Jump Securities dated November 16, 2023 ​Index Supplement dated November 16, 2023 Prospectus dated April 12, 2024 

Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

Investment Summary

Principal at Risk Securities

The Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027 (the “securities”) can be used:

￭As an alternative to direct exposure to the underlying indices that provides a fixed return of at least 24.50% (to be determined on the pricing date) if the final index value of each underlying index is greater than or equal to its respective initial index value;

￭To potentially outperform the worst performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index in a moderately bullish scenario; and

￭To obtain a buffer against a specified level of negative performance in the worst performing underlying index.

The securities are exposed on a 1-to-1 basis to the percentage decline of the final index value of the worst performing underlying index from its respective initial index value beyond the buffer amount of 20%. Accordingly, 80% of your principal is at risk.

The original issue price of each security is $1,000. This price includes costs associated with issuing, selling, structuring and hedging the securities, which are borne by you, and, consequently, the estimated value of the securities on the pricing date will be less than $1,000. We estimate that the value of each security on the pricing date will be approximately $983.70, or within $35.00 of that estimate. Our estimate of the value of the securities as determined on the pricing date will be set forth in the final pricing supplement.

What goes into the estimated value on the pricing date?

In valuing the securities on the pricing date, we take into account that the securities comprise both a debt component and a performance-based component linked to the underlying indices. The estimated value of the securities is determined using our own pricing and valuation models, market inputs and assumptions relating to the underlying indices, instruments based on the underlying indices, volatility and other factors including current and expected interest rates, as well as an interest rate related to our secondary market credit spread, which is the implied interest rate at which our conventional fixed rate debt trades in the secondary market.

What determines the economic terms of the securities?

In determining the economic terms of the securities, including the upside payment, the buffer amount and the downside threshold values, we use an internal funding rate, which is likely to be lower than our secondary market credit spreads and therefore advantageous to us. If the issuing, selling, structuring and hedging costs borne by you were lower or if the internal funding rate were higher, one or more of the economic terms of the securities would be more favorable to you.

What is the relationship between the estimated value on the pricing date and the secondary market price of the securities?

The price at which MS & Co. purchases the securities in the secondary market, absent changes in market conditions, including those related to the underlying indices, may vary from, and be lower than, the estimated value on the pricing date, because the secondary market price takes into account our secondary market credit spread as well as the bid-offer spread that MS & Co. would charge in a secondary market transaction of this type and other factors. However, because the costs associated with issuing, selling, structuring and hedging the securities are not fully deducted upon issuance, for a period of up to 6 months following the issue date, to the extent that MS & Co. may buy or sell the securities in the secondary market, absent changes in market conditions, including those related to

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

the underlying indices, and to our secondary market credit spreads, it would do so based on values higher than the estimated value. We expect that those higher values will also be reflected in your brokerage account statements.

MS & Co. may, but is not obligated to, make a market in the securities, and, if it once chooses to make a market, may cease doing so at any time.

January 2025 Page 3

Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

Key Investment Rationale

The securities provide a return based on the performance of the worst performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index. If the final index value of each underlying index, as determined on the valuation date, is greater than or equal to its respective initial index value, you will receive the stated principal amount for each security that you hold at maturity plus the upside payment of at least $245 per security (to be determined on the pricing date). If the final index value of each underlying index declines by an amount less than or equal to the buffer amount of 20% over the term of the securities from its respective initial index value, the payment due at maturity will equal the stated principal amount. However, if the final index value of any underlying index is less than its respective downside threshold value, the payment due at maturity will be less, and possibly significantly less, than the stated principal amount of the securities. You could lose up to 80% of the stated principal amount of the securities.

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

Hypothetical Examples

The following hypothetical examples illustrate how to calculate the payment at maturity on the securities. The following examples are for illustrative purposes only. The payment at maturity on the securities is subject to our credit risk. The below examples are based on the following terms. The actual initial index values and downside threshold values will be determined on the pricing date.

EXAMPLE 1: Each underlying index appreciates substantially, and investors therefore receive the stated principal amount plus the upside payment.

In example 1, the final index value for the SPX Index has increased from its initial index value by 85%, the final index value for the NDX Index has increased from its initial index value by 80% and the final index value for the RTY Index has increased from its initial index value by 90%. Because the final index value of each underlying index is above its respective initial index value value investors receive at maturity the stated principal amount plus the upside payment of $245 per security. Investors receive $1,245 per security at maturity and do not participate in the appreciation of any underlying index. Although each underlying index has appreciated substantially, the return on the securities is limited to the upside payment of $245 per security.

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

EXAMPLE 2: The final index value of each underlying index is at or above the respective downside threshold value but less than the respective initial index value, and investors therefore receive the stated principal amount.

In example 2, the final index value for the SPX Index has decreased from its initial index value by 4%, the final index value for the NDX Index has decreased from its initial index value by 3% and the final index value for the RTY Index has decreased from its initial index value by 2%. Because the final index value of each underlying index is above its respective downside threshold value but less than its respective initial index value, investors receive at maturity the stated principal amount.

EXAMPLE 3: The final index value of one of the underlying indices is less than its respective downside threshold value. Investors are therefore exposed to the negative performance of the worst performing underlying index, and lose 1% for every 1% decline beyond the buffer amount of 20%.

In example 3, the final index value for the SPX Index has increased from its initial index value by 40%, the final index value for the NDX Index has increased from its initial index value by 20% and the final index value for the RTY Index has decreased from its initial index value by 50%. Because one of the underlying indices has declined below its respective downside threshold value, investors do not receive the upside payment and are exposed to the negative performance of the RTY Index, which is the worst performing underlying index in this example. Under these circumstances, investors lose 1% for every 1% decline in the value of the worst performing underlying index beyond the buffer amount of 20%. In this example, investors receive a payment at maturity equal to $700 per security, resulting in a loss of 30%.

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

EXAMPLE 4: The final index value of each underlying index is less than the respective downside threshold value. Investors are therefore exposed to the negative performance of the worst performing underlying index, and will lose 1% for every 1% decline beyond the buffer amount of 20%.

In example 4, the final index value for the SPX Index has decreased from its initial index value by 70%, the final index value for the NDX Index has decreased from its initial index value by 85% and the final index value for the RTY Index has decreased from its initial index value by 60%. Because one or more underlying indices have declined below their respective downside threshold values, investors do not receive the upside payment and are exposed to the negative performance of the NDX Index, which is the worst performing underlying index in this example. Under these circumstances, investors lose 1% for every 1% decline in the value of the worst performing underlying index beyond the buffer amount of 20%. In this example, investors receive a payment at maturity equal to $350 per security, resulting in a loss of 65%.

Because the payment at maturity of the securities is based on the worst performing of the underlying indices, a decline in the final index value of any underlying index to below its respective downside threshold value will result in a loss of some or a significant portion of your investment, even if the other underlying indices have appreciated or have not declined as much. You could lose up to 80% of your investment in the securities.

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

Risk Factors

This section describes the material risks relating to the securities. For further discussion of these and other risks, you should read the section entitled “Risk Factors” in the accompanying product supplement, index supplement and prospectus. You should also consult with your investment, legal, tax, accounting and other advisers in connection with your investment in the securities.

Risks Relating to an Investment in the Securities

￭The securities do not pay interest and provide for the minimum payment at maturity of only 20% of your principal. The terms of the securities differ from those of ordinary debt securities in that the securities do not pay interest and provide for the minimum return of only 20% of the principal amount at maturity. At maturity, you will receive for each $1,000 stated principal amount of securities that you hold an amount in cash based upon the final index value of each underlying index. If the final index value of any underlying index is less than 80% of its respective initial index value, you will lose 1% of your principal for every 1% decline in the final index value of the worst performing underlying index beyond the buffer amount of 20%. You could lose up to 80% of the stated principal amount of the securities.

￭Appreciation potential is fixed and limited. Where the final index value of each underlying index is greater than or equal to its respective initial index value, the appreciation potential of the securities is limited to the fixed upside payment of at least $245 per security (24.50% of the stated principal amount), even if all three underlying indices have appreciated substantially. The actual upside payment will be determined on the pricing date.

￭The amount payable on the securities is not linked to the values of the underlying indices at any time other than the valuation date. The final index value of each underlying index will be based on the index closing value of such underlying index on the valuation date, subject to postponement for non-index business days and certain market disruption events. Even if the values of all three underlying indices appreciate prior to the valuation date but the value of any underlying index drops by the valuation date, the payment at maturity may be less, and may be significantly less, than it would have been had the payment at maturity been linked to the values of the underlying indices prior to such drop. Although the actual values of the underlying indices on the stated maturity date or at other times during the term of the securities may be higher than their respective final index values, the payment at maturity will be based solely on the index closing values on the valuation date.

￭The securities will not be listed on any securities exchange and secondary trading may be limited. The securities will not be listed on any securities exchange. Therefore, there may be little or no secondary market for the securities. Morgan Stanley & Co. LLC, which we refer to as MS & Co., may, but is not obligated to, make a market in the securities and, if it once chooses to make a market, may cease doing so at any time. When it does make a market, it will generally do so for transactions of routine secondary market size at prices based on its estimate of the current value of the securities, taking into account its bid/offer spread, our credit spreads, market volatility, the notional size of the proposed sale, the cost of unwinding any related hedging positions, the time remaining to maturity and the likelihood that it will be able to resell the securities. Even if there is a secondary market, it may not provide enough liquidity to allow you to trade or sell the securities easily. Since other broker-dealers may not participate significantly in the secondary market for the securities, the price at which you may be able to trade your securities is likely to depend on the price, if any, at which MS & Co. is willing to transact. If, at any time, MS & Co. were to cease making a market in the securities, it is likely that there would be no secondary market for the securities. Accordingly, you should be willing to hold your securities to maturity.

￭The market price of the securities may be influenced by many unpredictable factors. Several factors, many of which are beyond our control, will influence the value of the securities in the secondary market and the price at which MS & Co. may be willing to purchase or sell the securities in the secondary market, including:

othe values of the underlying indices at any time (including in relation to their respective initial index values),

othe volatility (frequency and magnitude of changes in value) of the underlying indices,

odividend rates on the securities underlying the underlying indices,

ointerest and yield rates in the market,

ogeopolitical conditions and economic, financial, political, regulatory or judicial events that affect the component stocks of the underlying indices or securities markets generally and which may affect the value of the underlying indices,

othe time remaining until the maturity of the securities,

othe composition of the underlying indices and changes in the constituent stocks of the underlying indices, and

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

oany actual or anticipated changes in our credit ratings or credit spreads.

Generally, the longer the time remaining to maturity, the more the market price of the securities will be affected by the other factors described above. Some or all of these factors will influence the price you will receive if you sell your securities prior to maturity. In particular, you may have to sell your securities at a substantial discount from the stated principal amount if at the time of sale the value of any underlying index is near, at or below its respective downside threshold value.

You cannot predict the future performance of the underlying indices based on their historical performance. If the final index value of any underlying index is less than 80% of its respective initial index value, you will be exposed on a 1-to-1 basis to the decline in the final index value of the worst performing underlying index beyond the buffer amount. There can be no assurance that the final index value of each underlying index will be greater than or equal to its respective initial index value so that you will receive at maturity an amount that is greater than the $1,000 stated principal amount for each security you hold, or that you will not lose some or a significant portion of your investment.

￭The securities are subject to our credit risk, and any actual or anticipated changes to our credit ratings or credit spreads may adversely affect the market value of the securities. You are dependent on our ability to pay all amounts due on the securities at maturity and therefore you are subject to our credit risk. If we default on our obligations under the securities, your investment would be at risk and you could lose some or all of your investment. As a result, the market value of the securities prior to maturity will be affected by changes in the market’s view of our creditworthiness. Any actual or anticipated decline in our credit ratings or increase in the credit spreads charged by the market for taking our credit risk is likely to adversely affect the market value of the securities.

￭As a finance subsidiary, MSFL has no independent operations and will have no independent assets. As a finance subsidiary, MSFL has no independent operations beyond the issuance and administration of its securities and will have no independent assets available for distributions to holders of MSFL securities if they make claims in respect of such securities in a bankruptcy, resolution or similar proceeding. Accordingly, any recoveries by such holders will be limited to those available under the related guarantee by Morgan Stanley and that guarantee will rank pari passu with all other unsecured, unsubordinated obligations of Morgan Stanley. Holders will have recourse only to a single claim against Morgan Stanley and its assets under the guarantee. Holders of securities issued by MSFL should accordingly assume that in any such proceedings they would not have any priority over and should be treated pari passu with the claims of other unsecured, unsubordinated creditors of Morgan Stanley, including holders of Morgan Stanley-issued securities.

￭The rate we are willing to pay for securities of this type, maturity and issuance size is likely to be lower than the rate implied by our secondary market credit spreads and advantageous to us. Both the lower rate and the inclusion of costs associated with issuing, selling, structuring and hedging the securities in the original issue price reduce the economic terms of the securities, cause the estimated value of the securities to be less than the original issue price and will adversely affect secondary market prices. Assuming no change in market conditions or any other relevant factors, the prices, if any, at which dealers, including MS & Co., are willing to purchase the securities in secondary market transactions will likely be significantly lower than the original issue price, because secondary market prices will exclude the issuing, selling, structuring and hedging-related costs that are included in the original issue price and borne by you and because the secondary market prices will reflect our secondary market credit spreads and the bid-offer spread that any dealer would charge in a secondary market transaction of this type as well as other factors.

The inclusion of the costs of issuing, selling, structuring and hedging the securities in the original issue price and the lower rate we are willing to pay as issuer make the economic terms of the securities less favorable to you than they otherwise would be.

However, because the costs associated with issuing, selling, structuring and hedging the securities are not fully deducted upon issuance, for a period of up to 6 months following the issue date, to the extent that MS & Co. may buy or sell the securities in the secondary market, absent changes in market conditions, including those related to the underlying indices, and to our secondary market credit spreads, it would do so based on values higher than the estimated value, and we expect that those higher values will also be reflected in your brokerage account statements.

￭The estimated value of the securities is determined by reference to our pricing and valuation models, which may differ from those of other dealers and is not a maximum or minimum secondary market price. These pricing and valuation models are proprietary and rely in part on subjective views of certain market inputs and certain assumptions about future events, which may prove to be incorrect. As a result, because there is no market-standard way to value these types of securities, our models may yield a higher estimated value of the securities than those generated by others, including other dealers in the market, if they attempted to value the securities. In addition, the estimated value on the pricing date does not represent a minimum or maximum price at which dealers, including MS & Co., would be willing to purchase your notes in the secondary market (if any exists) at any time. The value of your securities at any time after the date of this document will vary based on many factors that cannot be

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

predicted with accuracy, including our creditworthiness and changes in market conditions. See also “The market price of the securities may be influenced by many unpredictable factors” above.

￭Investing in the securities is not equivalent to investing in the underlying indices. Investing in the securities is not equivalent to investing in any underlying index or the component stocks of any underlying index. Investors in the securities will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to stocks that constitute the underlying indices.

￭The calculation agent, which is a subsidiary of Morgan Stanley and an affiliate of MSFL, will make determinations with respect to the securities. As calculation agent, MS & Co. will determine the initial index values, the downside threshold values, the final index values and the index percent changes, if applicable, and the payment that you will receive at maturity. Moreover, certain determinations made by MS & Co., in its capacity as calculation agent, may require it to exercise discretion and make subjective judgments, such as with respect to the occurrence or non-occurrence of market disruption events and the selection of a successor index or calculation of the index closing values in the event of a market disruption event or discontinuance of an underlying index.  These potentially subjective determinations may adversely affect the payout to you at maturity. For further information regarding these types of determinations, see “Description of Securities—Postponement of Valuation Date(s),” “—Discontinuance of Any Underlying Index or Basket Index; Alteration of Method of Calculation,” “—Alternate Exchange Calculation in case of an Event of Default” and “—Calculation Agent and Calculations” in the accompanying product supplement.  In addition, MS & Co. has determined the estimated value of the securities on the pricing date.

￭Hedging and trading activity by our affiliates could potentially adversely affect the value of the securities. One or more of our affiliates and/or third-party dealers expect to carry out hedging activities related to the securities (and to other instruments linked to the underlying indices or their component stocks), including trading in the stocks that constitute the underlying indices as well as in other instruments related to the underlying indices. As a result, these entities may be unwinding or adjusting hedge positions during the term of the securities, and the hedging strategy may involve greater and more frequent dynamic adjustments to the hedge as the valuation date approaches. Some of our affiliates also trade the stocks that constitute the underlying indices and other financial instruments related to the underlying indices on a regular basis as part of their general broker-dealer and other businesses. Any of these hedging or trading activities on or prior to the pricing date could potentially increase the initial index value of an underlying index, and, therefore, could increase the value at or above which such underlying index must close on the valuation date so that you do not suffer a loss on your initial investment in the securities (depending also on the performance of the other underlying indices). Additionally, such hedging or trading activities during the term of the securities, including on the valuation date, could adversely affect the value of any underlying index on the valuation date, and, accordingly, the amount of cash an investor will receive at maturity (depending also on the performance of the other underlying indices).

￭The U.S. federal income tax consequences of an investment in the securities are uncertain. Please read the discussion under “Additional Information—Tax considerations” in this document and the discussion under “United States Federal Taxation” in the accompanying product supplement for Jump Securities (together, the “Tax Disclosure Sections”) concerning the U.S. federal income tax consequences of an investment in the securities. There is no direct legal authority regarding the proper U.S. federal tax treatment of the securities, and we do not plan to request a ruling from the Internal Revenue Service (the “IRS”). Consequently, significant aspects of the tax treatment of the securities are uncertain, and the IRS or a court might not agree with the tax treatment of a security as a single financial contract that is an “open transaction” for U.S. federal income tax purposes. If the IRS were successful in asserting an alternative treatment of the securities, the tax consequences of the ownership and disposition of the securities, including the timing and character of income recognized by U.S. Holders and the withholding tax consequences to Non-U.S. Holders, might be materially and adversely affected. Moreover, future legislation, Treasury regulations or IRS guidance could adversely affect the U.S. federal tax treatment of the securities, possibly retroactively.

Both U.S. and Non-U.S. Holders should consult their tax advisers regarding the U.S. federal income tax consequences of an investment in the securities, including possible alternative treatments, as well as any tax consequences arising under the laws of any state, local or non-U.S. taxing jurisdiction.

Risks Relating to the Underlying Indices

￭You are exposed to the price risk of each underlying index. Your return on the securities is not linked to a basket consisting of each underlying index. Rather, it will be based upon the independent performance of each underlying index. Unlike an instrument with a return linked to a basket of underlying assets, in which risk is mitigated and diversified among all the components of the basket, you will be exposed to the risks related to each underlying index. Poor performance by any underlying index over the term of the securities will negatively affect your return and will not be offset or mitigated by any positive performance by the other underlying indices. If the final index value of any underlying index declines to below 80% of its respective initial index value, you

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Morgan Stanley Finance LLC

Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

will be exposed to the negative performance of the worst performing underlying index at maturity, even if the other underlying indices have appreciated or have not declined as much. Accordingly, your investment is subject to the price risk of each underlying index.

￭Because the securities are linked to the performance of the worst performing underlying index, you are exposed to greater risk of sustaining a loss on your investment than if the securities were linked to just one underlying index. The risk that you will suffer a loss on your investment is greater if you invest in the securities as opposed to substantially similar securities that are linked to the performance of just one underlying index. With three underlying indices, it is more likely that the final index value of any underlying index will decline to below its respective downside threshold value than if the securities were linked to only one underlying index. Therefore, it is more likely that you will suffer a loss on your investment.

￭The securities are linked to the Russell 2000® Index and are subject to risks associated with small-capitalization companies. As the Russell 2000® Index is one of the underlying indices, and the Russell 2000® Index consists of stocks issued by companies with relatively small market capitalization, the securities are linked to the value of small-capitalization companies. These companies often have greater stock price volatility, lower trading volume and less liquidity than large-capitalization companies and therefore the Russell 2000® Index may be more volatile than indices that consist of stocks issued by large-capitalization companies. Stock prices of small-capitalization companies are also more vulnerable than those of large-capitalization companies to adverse business and economic developments, and the stocks of small-capitalization companies may be thinly traded. In addition, small capitalization companies are typically less well-established and less stable financially than large-capitalization companies and may depend on a small number of key personnel, making them more vulnerable to loss of personnel. Such companies tend to have smaller revenues, less diverse product lines, smaller shares of their product or service markets, fewer financial resources and less competitive strengths than large-capitalization companies and are more susceptible to adverse developments related to their products.

￭Adjustments to the underlying indices could adversely affect the value of the securities. The publisher of each underlying index may add, delete or substitute the stocks underlying such index or make other methodological changes that could change the value of such underlying index. Any of these actions could adversely affect the value of the securities. The publisher of each underlying index may also discontinue or suspend calculation or publication of such underlying index at any time. In these circumstances, MS & Co., as the calculation agent, will have the sole discretion to substitute a successor index that is comparable to the discontinued underlying index. MS & Co. could have an economic interest that is different than that of investors in the securities insofar as, for example, MS & Co. is permitted to consider indices that are calculated and published by MS & Co. or any of its affiliates. If MS & Co. determines that there is no appropriate successor index, the payout on the securities at maturity will be an amount based on the closing prices on the valuation date of the stocks underlying the relevant index at the time of such discontinuance, without rebalancing or substitution, computed by the calculation agent in accordance with the formula for calculating such underlying index last in effect prior to such discontinuance (depending also on the performance of the other underlying indices).

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Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

Principal at Risk Securities

S&P 500® Index Overview

The S&P 500® Index, which is calculated, maintained and published by S&P® Dow Jones Indices LLC (“S&P®”), is intended to provide a benchmark for performance measurement of the large capitalization segment of the U.S. equity markets by tracking the stock price movement of 500 companies with large market capitalizations. Component stocks of the S&P 500® Index are required to have a total company level market capitalization that reflects approximately the 85th percentile of the S&P® Total Market Index. The S&P 500® Index measures the relative performance of the common stocks of 500 companies as of a particular time as compared to the performance of the common stocks of 500 similar companies during the base period of the years 1941 through 1943. For additional information about the S&P 500® Index, see the information set forth under “S&P® U.S. Indices—S&P 500® Index” in the accompanying index supplement.

Information as of market close on December 20, 2024:

The following graph sets forth the daily closing values of the SPX Index for the period from January 1, 2019 through December 20, 2024. The related table sets forth the published high and low closing values, as well as end-of-quarter closing values, of the SPX Index for each quarter in the same period. The closing value of the SPX Index on December 20, 2024 was 5,930.85. We obtained the information in the table and graph below from Bloomberg Financial Markets, without independent verification. The SPX Index has at times experienced periods of high volatility, and you should not take the historical values of the SPX Index as an indication of its future performance.

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“Standard & Poor’s®,” “S&P®,” “S&P 500®,” “Standard & Poor’s 500” and “500” are trademarks of Standard and Poor’s Financial Services LLC. For more information, see “S&P® U.S. Indices” in the accompanying index supplement.

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Nasdaq-100 Index® Overview

The Nasdaq-100 Index®, which is calculated, maintained and published by Nasdaq, Inc., is a modified capitalization-weighted index of 100 of the largest and most actively traded equity securities of non-financial companies listed on The Nasdaq Stock Market LLC (the “Nasdaq”). The Nasdaq-100 Index® includes companies across a variety of major industry groups. At any moment in time, the value of the Nasdaq-100 Index® equals the aggregate value of the then-current Nasdaq-100 Index® share weights of each of the Nasdaq-100 Index® component securities, which are based on the total shares outstanding of each such Nasdaq-100 Index® component security, multiplied by each such security’s respective last sale price on the Nasdaq (which may be the official closing price published by the Nasdaq), and divided by a scaling factor, which becomes the basis for the reported Nasdaq-100 Index® value. For additional information about the Nasdaq-100 Index®, see the information set forth under “Nasdaq-100 Index®” in the accompanying index supplement.

Information as of market close on December 20, 2024:

The following graph sets forth the daily closing values of the NDX Index for the period from January 1, 2019 through December 20, 2024. The related table sets forth the published high and low closing values, as well as end-of-quarter closing values, of the NDX Index for each quarter in the same period. The closing value of the NDX Index on December 20, 2024 was 21,289.15. We obtained the information in the table and graph below from Bloomberg Financial Markets, without independent verification. The NDX Index has at times experienced periods of high volatility, and you should not take the historical values of the NDX Index as an indication of its future performance.

January 2025 Page 14

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Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

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“Nasdaq®,” “Nasdaq-100®” and “Nasdaq-100 Index®” are trademarks of Nasdaq, Inc. For more information, see “Nasdaq-100 Index®” in the accompanying index supplement.

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Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

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Russell 2000® Index Overview

The Russell 2000® Index is an index calculated, published and disseminated by FTSE International Limited (“FTSE Russell”), and measures the capitalization-weighted price performance of 2,000 U.S. small-capitalization stocks listed on eligible U.S. exchanges. The Russell 2000® Index is designed to track the performance of the small-capitalization segment of the U.S. equity market. The companies included in the Russell 2000® Index are the middle 2,000 (i.e., those ranked 1,001 through 3,000) of the companies that form the Russell 3000E™ Index. The Russell 2000® Index represents approximately 7% of the U.S. equity market. For additional information about the Russell 2000® Index, see the information set forth under “Russell Indices—Russell 2000® Index” in the accompanying index supplement.

Information as of market close on December 20, 2024:

The following graph sets forth the daily closing values of the RTY Index for the period from January 1, 2019 through December 20, 2024. The related table sets forth the published high and low closing values, as well as end-of-quarter closing values, of the RTY Index for each quarter in the same period. The closing value of the RTY Index on December 20, 2024 was 2,242.370. We obtained the information in the table below from Bloomberg Financial Markets, without independent verification. The RTY Index has at times experienced periods of high volatility, and you should not take the historical values of the RTY Index as an indication of its future performance.

January 2025 Page 16

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Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

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“Russell 2000® Index” and “Russell 3000ETM Index” are trademarks of FTSE Russell. For more information, see “Russell Indices” in the accompanying index supplement.

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Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

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Additional Terms of the Securities

Please read this information in conjunction with the terms on the front cover of this document.

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Buffered Jump Securities Based on the Value of the Worst Performing of the S&P 500® Index, the Nasdaq-100 Index® and the Russell 2000® Index due January 7, 2027

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Additional Information About the Securities

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January 2025 Page 21