US STOCKS-Wall St sinks on home builder fears, financials

* Home buyer tax credit fears hurt financials, builders

* Commodity shares retreat amid U.S. dollar's bounce

* Dow off 1.1 pct; S&P off 1.2 pct; Nasdaq off 0.6 pct

* For up-to-the-minute market news, click [STXNEWS/US] (Recasts lead, adds Harry Reid news)

By Ellis Mnyandu

NEW YORK, Oct 26 (Reuters) - U.S. stocks fell for a second straight session on Monday as investors ditched home builders and financials on fears lawmakers may let a federal home buyer tax credit expire, while commodity shares succumbed to pressure from the higher U.S. dollar.

Trading was choppy. Stocks initially started on firmer footing, with indexes up more than 1 percent shortly after the open, but the bounce quickly faded as the U.S. dollar rebounded and investors fretted about the financial sector's prospects.

The tax credit has become a hot button issue and Wall Street sold off after an incorrect media headline said research firm, ISI Group, had written the tax credit probably would not be extended when it expires Nov. 30. For details, see [ID:nN26135701]

The research report, however, was similar to news on Friday that Senator Majority Leader Harry Reid wanted to phase out the tax credit over time, and not let it expire. Reid said on Monday the Senate could vote as soon as Tuesday to extend the tax break.

JPMorgan (JPM.N), down 3.1 percent at $43.82, was among the top drags, along with Bank of America (BAC.N), down 5.1 percent at $15.40. The S&P financial index .GSPF slipped 2.5 percent, while the Dow Jones U.S. home construction index .DJUSHB declined 3.4 percent.

"It's a tough sell now to Congress to say we need another extension of the home buyer tax credit when supposedly we are out of the recession, according to economists, and housing is doing well again," said Joe Saluzzi, co-manager of trading at Themis Trading in Chatham, New Jersey. "If they are talking more of a phase-out than an extension, that certainly will hurt the market."

Without the home buyer credit, investors worry that the struggling housing market might lose a crucial incentive that has spurred hopes of stabilization in recent months.

The Dow Jones industrial average .DJI dropped 104.22 points, or 1.05 percent, to 9,867.96. The Standard & Poor's 500 Index .SPX shed 12.65 points, or 1.17 percent, to 1,066.95. The Nasdaq Composite Index .IXIC fell 12.62 points, or 0.59 percent, to 2,141.85.

The S&P 500 is now up 57.7 percent from the 12-year closing low of March 9, having slipped from its recovery peak when it was up 62.3 percent from that low.

Financials also came under pressure from the news that Dutch banking, insurance and asset management company ING (ING.AS)(ING.N) will split in two as part of a plan to pay back government bailout funds and return to its retail savings bank roots. For details, see [ID:nLQ54845]