(Refiles to fix typo in headline) (Updates to midday, changes byline)
*Financial stocks tumble on credit jitters
*Tech, retail sectors gain on economic data
*Oil, gold prices seen swaying market direction
By Walker Simon
NEW YORK, May 28 (Reuters) - U.S. stocks fell in choppy trading on Wednesday as renewed fears about the health of the financial sector overshadowed stronger-than-expected data on business investment that suggested an improving economy.
American International Group <AIG.N>, the world's largest insurer, fell 4.6 percent and dragged the major indexes lower after Citigroup said the insurer may need even more capital after raising $20 billion just last week.
Deepening concerns about the banking sector, KeyCorp <KEY.N> said mounting loan losses could cause write-offs to double from its prior forecast, sending its shares more than 11 percent lower.
But government data showing a surprise jump in business investment last month, combined with a steadying oil price and retailers' profits, bolstered the view the economy might be in better shape than had been feared.
The retail sector gained after Polo Ralph Lauren Corp <RL.N> reported sharply higher quarterly profit on Wednesday that soared past Wall Street estimates, sending the clothing maker's shares up 11 percent to $68.46.
"You have a tug of war going on between the good news and the bad news," said Jim Awad, chairman of W.D. Stewart and Co. Ltd. in New York. "The good news (is) business spending and Ralph Lauren profits, and the bad news is the financials downgrades and Key Corp."
The Dow Jones industrial average <
> was down 45.43 points, or 0.36 percent, at 12,502.92. The Standard & Poor's 500 Index <.SPX> was down 6.50 points, or 0.47 percent, at 1,378.85. The Nasdaq Composite Index < > was down 14.85 points, or 0.60 percent, at 2,466.39."The swing factor that will referee this and push (the market) one way or another will be oil and gold," he added.
Underscoring concerns about the outlook for financial stocks, J.P. Morgan Securities cut its profit view on three large U.S. investment banks and suggested investors avoid the brokerage sector as earnings estimates continue to appear too bullish.
Stocks started the session in positive territory, helped by pullback in oil prices. Crude oil futures <CLc1> which had fallen more than $2 a barrel, reversed course to rise $1.45 to $130.29 a barrel.
Gold bounced off a two-week low as oil reversed its losses, highlighting the metal's appeal as a hedge against inflation. Spot gold <XAU=> was trading at $900.50 an ounce, up from an earlier low of $889.35 but down from Tuesday's $907.10.
The news on KeyCorp, a large Midwest bank, rattled other regional banks.
Ohio-based Fifth Third, <FITB.O> fell 3.41 percent to $18.87 and Texas-based Comerica <CMA.N> fell 4.8 percent to $35.31.
"The KeyCorp news last night showed we are not out of the woods yet in financials," said Kurt Brunner, portfolio manager at Swarthmore Group in Philadelphia, Pennsylvania.
Shares of AIG fell 4.7 percent to $34.89.