NEW YORK (AP) -- Signs of a slowing economy dragged down the stock market Wednesday, and even a pledge of more stimulus from the Federal Reserve left investors cold.
The Dow Jones industrial average was down 121 points, or 0.8 percent, to 14,718 as of 3:20 p.m. Eastern time. The Standard & Poor's 500 index, a broader market measure, dropped 13 points to 1,585, a decline of 0.8 percent.
Stocks opened lower and kept sagging throughout the day, hurt by reports that showed a slowdown in hiring and manufacturing last month. There was no help on the earnings front: The big-name companies that reported results most disappointed.
"Investors are going to be rattled by these numbers," said Colleen Supran, a principal at San Francisco based-Bingham, Osborn & Scarborough. She expects stock market swings to increase following the early gains of the year.
The stock market remained in negative territory even after the Federal Reserve released at statement following a two-day policy meeting.
The central bank stood by its huge effort to stimulate the economy. The Fed is maintaining its $85-billion-a-month bond-buying program, which is intended to keep interest rates low to spur borrowing, spending and investing.
In a statement, the Fed said that tax increases and spending cuts that kicked in this year are slowing the economy. The Fed also made clear that it could increase or decrease its bond purchases depending on the performance of the job market and inflation.
"It's an acknowledgement that the soft patch can intensify," said Quincy Krosby, a market strategist for Prudential Financial, referring to the slowing growth in the economy.
The Fed's program has been one of the supporting factors behind the stock market's rally this year. The S&P 500 reached record highs in April and has risen every month in 2013, gaining 12 percent so far.
The yield on the 10-year Treasury note edged higher after the Fed announcement.
Company earnings were also in the spotlight Wednesday.
Drugmaker Merck & Co. fell $1.34, or 2.9 percent, to $45.66 after it cut its 2013 profit forecast. The company said competition from generic versions of its drugs and unfavorable exchange rates hurt its profit.
MasterCard eased $14.90, or 2.7 percent, to $537.80 after the payments processing company reported that revenue missed the expectations of financial analysts who cover the firm.
About two thirds of companies in the S&P 500 index have announced earnings for the first quarter.
The quarterly earnings are at record levels, and about seven of 10 companies have topped forecasts of Wall Street analysts, according to S&P Capital IQ data. Revenues have disappointed, though, with about six of 10 companies falling short of expectations. That suggests companies are raising profits through cutting costs rather than boosting revenues.
After companies finish reporting quarterly results, earnings are expected to grow by 4.1 percent in the first quarter. Then they'll accelerate throughout the year, reaching 12 percent growth in the final quarter, according to S&P Capital IQ.
But some market watchers were cautious.
"From here on out, this market expansion story from cost-cutting, it's hard to believe it's going to continue much longer," said Savita Subramanian, head of U.S. equity and quantitative strategy at Bank of America Merrill Lynch. "We need some kind of top-line or demand recovery. If we don't see that, then the equity market is toast."
Government spending cuts will likely slow economic growth in the current quarter, according to the investment bank arm of Bank of America. Growth will pick up toward the end of the year, helped by the housing market's recovery.
Among other stocks making big moves, home security company ADT fell $2.83, or 6.5 percent, to $40.81 after its profit didn't live up to analysts' hopes.
T-Mobile USA Inc., the combination of T-Mobile USA and MetroPCS, rose $1.20 cents, or 7.8 percent, to $16.79 on its first day of trading. Goldman Sachs analysts opened their coverage of the stock with a "buy" recommendation and a 12-month price target of $22, predicting that the company will benefit from further consolidation in the industry.
The Nasdaq composite index dropped 28 points, or 0.8 percent, to 3,300.
In government bond trading, demand for the 10-year Treasury note rose, pushing down its yield to 1.63 percent from 1.67 percent. The yield is at its lowest of the year.
Markets in Europe were closed for the May Day holiday.
The start of the new month will also remind investors of the investing adage "Sell in May and go away."
In at least the last two years, stock gains at the beginning of the year have been followed by late spring-early summer swoons. In 2012 stocks plunged in May on growing concern that Spain and Italy would be sucked deeper into Europe's debt crisis. The year before, wrangling about the U.S. debt ceiling rattled markets.
Since 1970, the S&P 500 has generated an annualized return of 4.1 percent from May through October, well below the 17.2 percent annualized return from November through April.