* Lehman files for bankruptcy protection
* Merrill Lynch agrees to buyout by Bank of America
* Investors are nervous about stability of other firms
* Dow off 2 pct, S&P 500 down 1.8 pct, Nasdaq off 1.3 pct (Updates to late morning)
By Ellis Mnyandu
NEW YORK, Sept 15 (Reuters) - U.S. stocks fell on Monday as a bankruptcy filing by U.S. investment bank Lehman Brothers Holdings Inc <LEH.N> and cascading fears about the stability of other major financial institutions spooked global markets.
Even so, a sharp drop in oil prices helped indexes pare some losses by late morning as shares of airlines and other transportation companies headed higher. A transportation index <.DJT> was up 0.05 percent.
FedEx Corp <FDX.N> was up 1.3 percent, while Delta Air Lines <DAL.N> climbed 3.8 percent.
Lower oil prices help ease spending strains on businesses and consumers, and so shares of retailers and technology companies headed higher. Internet retailer Amazon.com <AMZN.O> rose 0.9 percent.
Even so, financial sector shares remained under water as investors fretted about the health of other major financial services companies.
Insurer American International Group <AIG.N> and savings and loan company Washington Mutual <WM.N> are among other major companies which investors fear are threatened by the year-long credit maelstrom and that may have to step up efforts to raise capital to shore up their balance sheets.
"It's now a matter of what's next," said Edward Craig, managing director and head of U.S. cash equities trading at Jefferies & Co in New York.
"I think as you could see the market was down sharply, rightfully so earlier. As long as the liquidation occurs in an orderly manner that's an efficient market. There's always winners and losers. Unfortunately Lehman was the loser."
The Dow Jones industrial average <
> fell 229.04 points, or 2.01 percent, to 11,192.95. The Standard & Poor's 500 Index <.SPX> shed 22.63 points, or 1.81 percent, to 1,229.07. The Nasdaq Composite Index < > lost 28.53 points, or 1.26 percent, to 2,232.74.AIG shares tumbled 46.5 percent to $6.49 on the New York Stock Exchange, while those of Lehman plummeted 95 percent to 19 cents in composite trading. Washington Mutual dropped 19.4 percent to $2.20.
Heightened concern about the stability of other Wall Street firms followed the U.S. government's decision not to provide guarantees for any deal to help Lehman avert bankruptcy.
The S&P financial index <.GSPF> was down 3.2 percent.
Lehman, weighed down by losses spawned by the U.S. mortgage crisis, sought bankruptcy protection on Monday following a failed scramble over the weekend to find a buyer. For more see [
].But while Lehman ended up with no option but to file for bankruptcy protection, Merrill Lynch <MER.N>, whose outlook has also come under scrutiny, agreed to be bought by Bank of America <BAC.N>, the No. 2 U.S. bank.
Merrill shares climbed 26.6 percent to $21.58, but bank of America shares dropped 13.9 percent to $29.05.
U.S. crude <CLc1> fell $4.62 to $96.56 a barrel on the New York Mercantile Exchange. The S&P energy index <.GSPE> fell 2.6 percent. (Additional reporting by Steven C. Johnson; Editing by James Dalgleish)