By Kate Gibson, MarketWatch

NEW YORK (MarketWatch) -- U.S. stocks fell hard on Wednesday as an Apple Inc. supplier gave a weak forecast, Bank of America Corp. posted disappointing results and speculation swirled that Germany could lose its triple-A rating.

"In this environment you don't want to miss, you want to beat and guide higher," said Phil Orlando, equity strategist at Federated Investors, citing Intel Corp. and Bank of America's quarterly earnings reports.

In addition, unsubstantiated talk involving Germany, the euro zone's largest economy, hammered German stocks, with the U.S. market following suit.

"Our desk identified some tweet or something that hit at four this morning that suggested that Germany's government finances were under review for a possible downgrade," said Orlando.

"We don't know if this is legitimate, but the bottom line is in the middle of the night our time European markets went into a tailspin," he said.

After a 195-point slide, the Dow Jones Industrial Average (DJI) was lately off 161.50 points at 14,595.28, with B. of A. (BAC) pacing the index's declines that had all but three of its 30 components in the red.

B. of A. shares slid 5.8% after the lender reported first-quarter earnings below Wall Street's estimates as its mortgage business weighed.

Caterpillar Inc. (CAT) was down 2.1% after Macquarie downgraded the construction-equipment maker to neutral from outperform.

The S&P 500 index (SPX) shed 25.49 points to 1,549.08, with the energy and technology sectors weighing most heavily.

The technology-heavy Nasdaq Composite (RIXF) declined 67.3 points to 3,197.31. Apple fell 5.6% and Cirrus Logic Inc. (CRUS) plummeted 14% after the chip maker and Apple supplier offered a weak first-quarter revenue outlook and DigiTimes reported that iPad mini shipments would fall as much as 30% in the second quarter.

Bank of New York Mellon Corp. (BK) declined 3.2% after reporting a first-quarter loss and adjusted earnings that missed estimates.

Fairway Group Holdings Corp. (FWM) rallied 25% in its market debut, after the New York grocer's initial public offering reportedly got off to a strong start late Tuesday. Shares of rival Whole Foods Market Inc. (WFM) fell 2%.

Textron Inc. (TXT) lost almost 13% after the firm forecast a drop in business-jet deliveries and reported a first-quarter profit beneath estimates.

Yahoo Inc. (YHOO) edged lower after Bank of America Merrill Lynch upgraded the Internet company to buy from neutral, a day after Yahoo forecast second-quarter sales below expectations.

For every stock that rose, nearly five fell on the New York Stock Exchange, where 312 million shares traded as of 12:05 p.m. Eastern.

Composite volume exceeded 1.8 billion.

On the New York Mercantile Exchange, oil prices (CLK3) fell under $87 a barrel after government data had production rising and demand for gasoline down for a second week.

Gold edged lower (GCM3) to $1,386 an ounce.

On Monday, weak growth numbers from China set off a selloff in commodities, with benchmark crude for May delivery falling 3% and gold tallying its largest one-day drop in three decades.

The Financial Times on Wednesday reported a senior auditor in China had cautioned that escalating local government debt could bring on a larger financial crisis than the U.S. housing market crash.

The dollar (DXY) gained against other currencies and Treasury yields fell, with the benchmark 10-year note (10_YEAR) just below 1.7%.

At 2 p.m. Eastern, the Federal Reserve will release its Beige Book, which offers an economic analysis of its 12 districts.

The Fed survey will reflect where the central bank thinks the U.S. economy is right now, that it's "on the cusp of one of these spring swoons, and is showing signs of what we hope are transitory signs of softness. They may say they hope growth will firm in the latter stages of 2013," said Orlando.

"If they say everything is great, I'd be surprised," he added.

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