(Updates to early afternoon, changes byline)
By Jennifer Coogan
NEW YORK, Feb 5 (Reuters) - U.S. stocks tumbled on Tuesday after data showed the vast services sector contracted in January, the latest sign pointing to a U.S. recession.
Major indexes tumbled 2 percent in a broad-based decline. But banks and other financial services stocks lost heavily on worry the service-sector slowdown portrayed in the Institute for Supply Management data would crimp demand for loans and capital investment.
In addition, telecommunications shares like Verizon Communications Inc <VZ.N>, whose products make up the backbone of the services industry, tumbled.
Insurer American International Group Inc <AIG.N> led the decline among the Dow industrials, falling 4 percent on fears about credit exposure. Investment bank Goldman Sachs & Co <GS.N> slid more than 3 percent after a broker downgrade.
"Much of the move today is based on the weak ISM numbers," said Matt Kaufler, portfolio manager at Clover Capital Management in Rochester, New York. "There is also a growing realization that the credit problems aren't going away."
The Dow Jones industrial average <
> was down 252.00 points, or 1.99 percent, at 12,383.16. The Standard & Poor's 500 Index <.SPX> was down 28.51 points, or 2.06 percent, at 1,352.31. The Nasdaq Composite Index < > was down 41.19 points, or 1.73 percent, at 2,341.66.A slide in the shares of energy companies such as Exxon Mobil Corp <XOM.N> was another headwind, with oil prices down on concerns an economic downturn will slow energy demand.
Exxon was down 2.2 percent at $83.59, making it the top-weighted drag on the S&P.
AIG shares fell 4.1 percent to $53.13, while Goldman Sachs declined 4.5 percent to $191.74. Citigroup Inc <C.N> shares fell 6 percent to $27.43.
Technology shares, seen as particularly vulnerable to a downturn in both business and consumer spending, contributed to the market's drop.
Shares of business software maker Oracle Corp <ORCL.O> falling nearly 3.9 percent to $19.41, while BlackBerry device maker Research In Motion Ltd's stock <RIM.TO><RIMM.O> fell 3..9 percent to $89.51.
Verizon shares fell 4.2 percent to $37.01 while rival AT&T Inc <T.N> stock dropped 2.8 percent to $37.11 on the NYSE.
The U.S. services sector data followed figures showing services growth in the euro zone decelerated sharply in January, raising fears of a spillover from the United States.
The ISM index posted the largest monthly drop since the index began in 1997 and hit the lowest level since October 2001 during the previous recession. (Additional reporting by Kristina Cooke; Editing by Kenneth Barry)