* U.S. slide 2 pct as credit worries slam financial shares
* Bonds rise; financial sector fears boost safe-haven bid
* Report of trimmed IMF growth forecasts weigh on markets
* Oil rebounds as concerns mount on Gulf of Mexico storm (Adds close of U.S. markets)
By Herbert Lash
NEW YORK, Aug 25 (Reuters) - U.S. stocks fell sharply on Monday as persistent credit and global growth concerns pulled equities down and led investors into safe-haven investments like bonds.
The declining price of U.S. equities reduced demand for the dollars to buy them and pushed investors into investments perceived as less risky, such as the yen and government debt.
Pressuring the financial sector was a steep drop in shares of American International Group Inc <AIG.N>, which skidded to a 13-year low after Credit Suisse cut its price target and forecast a huge loss, mainly due to higher derivatives losses. AIG fell more than 5 percent to $18.78.
Lehman Brothers <LEH.N> also contributed to the negative tone, falling nearly 7 percent after a top South Korean regulator expressed concern about state-run Korea Development Bank's interest in buying a global bank. Talk of a white knight buyout of the mortgage-hit bank boosted shares last week.
The Dow Jones industrial average <
> fell 241.81 points, or 2.08 percent, at 11,386.25. The Standard & Poor's 500 Index <.SPX> slipped 25.36 points, or 1.96 percent, at 1,266.84. The Nasdaq Composite Index < > shed 49.12 points, or 2.03 percent, at 2,365.59.Crude prices edged higher in thin, seesaw trade as Tropical Storm Gustav formed in the Caribbean, stirring concerns that it could disrupt the high concentration of U.S. oil and natural gas production that comes from the Gulf of Mexico.
Investors flocking to government debt pushed benchmark yields on U.S. Treasuries to 3-month lows while bund futures in Europe posted their biggest one-day rise in a month. Bond prices and yields move inversely to each other.
The dollar dropped against the yen, pressured by sharp losses in the U.S. stocks the nagging credit worries prompted investors to pare risky trades. But it gained versus the euro.
The dollar gained against major currencies, with the U.S. Dollar Index <.DXY> up 0.05 percent at 76.82. Against the yen, the dollar <JPY=> fell 0.63 percent at 109.32.
The euro <EUR=> fell 0.26 percent at $1.4752.
The British pound hit two-year lows against the dollar at one point, with stalled UK growth seen as another example of growing economic malaise outside the United States.
"Ongoing credit angst is giving us some flight-to-quality trade, but trading is pretty thin," said Kim Rupert, managing director of global fixed income analysis at Action Economics LLC in San Francisco.
Credit concerns hounded financial stocks on both sides of the Atlantic and worries about global growth hit technology stocks and industrials.
The Dow and Nasdaq fell slightly more than 2 percent, while the broad S&P 500 fell almost as much. The declines erased Friday's gains, although traders said a U.K. bank holiday and thin, end-of-summer trading may have exaggerated the downturn.
Among industrial conglomerates with big overseas exposure, Caterpillar <CAT.N> shed 2.35 percent. The International Monetary Fund trimmed its forecasts for 2008 and 2009 world economic growth in a note prepared for the meeting of the Group of 20 nations, a G20 finance official told Reuters.
European shares also fell on persistent financial sector worries, with Spanish bank Santander <SAN.MC> and Dutch-Belgian financial group Fortis <FOR.AS> both dropping 2.4 percent.
The FTSEurofirst 300 <
> index of top European shares ended 0.56 percent lower at 1,169.17 points.Lower crude oil prices <CLc1><LCOc1> extended the previous session's steep slide in energy majors. Royal Dutch Shell <RDSa.AS> fell 1.8 percent and Total <TOTF.PA> 1.4 percent.
The IMF's lowered economic growth projections signaled weaker demand and hit shares in steel maker ArcelorMittal <MTP.PA>, down 2.2 percent, and engineering conglomerate Siemens <SIEGn.DE>, off 1.6 percent, among European big caps.
Analysts said European stocks might struggle in the near term as the global economic outlook remains uncertain.
"The markets will remain lacklustre," said Franz Wenzel, strategist at AXA Investment Managers in Paris. "People are nervous and hardly any risky money is at work," he said.
Even as the dollar rallied this month, concerns about U.S. mortgage finance companies Fannie Mae <FNM.N> and Freddie Mac <FRE.N> have kept the U.S. currency's gains in check.
Gustav was expected to strengthen and bring hurricane conditions to parts of the Dominican Republic and Haiti within 24 hours. Four tracking forecasts show it heading toward Guatemala, Belize or the Yucatan Peninsula; two show it heading toward the Gulf of Mexico.
U.S. crude <CLc1> settled up 52 cents at $115.11 a barrel after falling more than 5.4 percent on Friday in the largest one-day slide since Dec. 27, 2004. Brent crude <LCOc1> gained 11 cents to settle at $114.03 a barrel.
"The session was lackluster and was looking for direction when news of the upgrade of Gustav came in and all of a sudden prices rose," said Gene McGillian, analyst for Tradition Energy in Stamford, Connecticut.
Gold fell in quiet trading as a dollar rise against the euro prompted profit-taking.
December gold futures <GCZ8> settled down $7.80 at $825.70 an ounce in New York.
The benchmark 10-year U.S. Treasury note <US10YT=RR> rose 22/32 to yield 3.79 percent. The 30-year U.S. Treasury bond<US30YT=RR> added 35/32 to yield 4.40 percent.
The dollar's earlier rally sparked Asian stocks to rebound from a two-year low as the drop in oil prices back below $120 a barrel lifted shares of companies sensitive to energy prices.
Japan's Nikkei share average <
> ended up 1.7 percent, and MSCI's Asia-Pacific ex-Japan index <.MIAJP00000PUS> rose 1.2 percent. (Reporting by Steven C. Johnson, Kristina Cooke, Matthew Robinson, Chris Reese, Nick Olivari and Frank Tang in New York and Ian Chua in London and Peter Starck in Frankfurt) (Reporting by Herbert Lash. Editing by Richard Satran)