(Adds opening of U.S. markets, byline; dateline previous LONDON)
By Herbert Lash
NEW YORK, March 20 (Reuters) - Gold and oil fell sharply on Thursday as investors dumped commodities and lifted U.S. stocks on the view that inflation could moderate if the trend in futures markets continues.
The dollar rose to a week-high against the euro as investors fleeing commodities repatriated their cash into the beleaguered U.S. currency. The sharp drop of the dollar this year has given a major lift to commodities denominated in the U.S. currency.
Treasury debt prices mostly slipped but the shortest-dated government instruments rallied again amid a powerful safe-haven bid on the exodus out of commodities.
European stocks pared losses, bolstered by gains on Wall Street following a better-than-expected survey on factory activity in the U.S. mid-Atlantic region, but commodity-related stocks and banking shares kept indexes in negative territory.
Oil fell below $100 a barrel for the first time in two weeks, extending a hefty sell-off the previous day on growing concerns that a slowdown in top consumer the United States would undermine global demand for energy.
"We continue to see profit-taking among commodities. There are also macro-economic concerns about the economy and the dollar has been doing better," said Mike Wittner, global head of oil market research in London for Societe Generale.
Gold <XAU=> dropped more than 4 percent to a one-month low, while platinum slid more than 5 percent to the lowest since early February as funds cashed in.
Oil, gold and other commodities had been hitting a series of record highs this year as investors took refuge in dollar-denominated assets amid the carnage in stock markets.
Crude oil <CLc1> hit a record $111.80 a barrel on Tuesday and gold hit a record $1,030.80 an ounce on Monday.
Investors nervous about weakening demand in a sagging economy are cashing in on the recent record prices. Oil and gold both are down more than 10 percent since hitting records earlier in the week.
"People have done very well in commodities and they may be doing badly elsewhere," said Ian Morley, chief executive at fund manager Dawnay Day Brokers.
"Prices in the long term may be going higher, but the recent rise has been speculative and we've run out of fundamentals to explain it," Morley said.
As investors slashed their "long" exposure to commodities, they covered "short" positions in the dollar, which lifted the currency from historic lows charted earlier this week.
"Commodity markets and currencies are very interconnected and as we see the system deleverage positions in oil and gold, the dollar is bouncing back," said Camilla Sutton, a currency strategist at Scotia Capital in Toronto.
The Dow Jones industrial average <
> was up 107.79 points, or 0.89 percent, at 12,207.45. The Standard & Poor's 500 Index <.SPX> was up 10.74 points, or 0.83 percent, at 1,309.16. The Nasdaq Composite Index < > was up 13.69 points, or 0.62 percent, at 2,223.65.Crude's fall helped relieve worries about the effect of higher prices on consumers and businesses. Shares of retailer Wal-Mart Stores Inc <WMT.N> rose 3.64 percent to $52.63.
European shares pared losses on the Philly Fed survey, but closed lower. The FTSEurofirst 300 <
> index of top European shares closed 0.3 percent lower at 1,227.03 points.Credit Suisse <CSGN.VX>, which issued a profit warning, was down 7 percent, Total <TOTF.PA> down 2.2 percent and Rio Tinto <RIO.L> down 4.6 percent.
Credit Suisse said big debt write-downs and tough markets made it unlikely that the bank would be profitable in the first quarter. But it did say the surprise trading hit it announced in February was not as bad as previously thought.
The Philly Fed report helped the dollar to extend gains versus the yen and the euro.
The euro was down 1.4 percent at $1.5419, well off Monday's record $1.5904, and chalking up its steepest one-day fall since early February.
The dollar erased earlier gains versus the yen and last traded little changed at 98.78 yen <JPY=>,
Benchmark U.S. government securities yields, which move inversely to their prices, traded not far above two month lows amid deep concerns about the troubled credit markets.
Yields of ultra short-dated Treasury bills, deemed the safest U.S. government securities, were at their lowest levels in more than five decades as investors continued this week's exodus from falling commodities into the safety of cash.
"Clearly the bill market is just on fire, from the tone of flows moving into that sector," said Marty Mitchell, head of government bond trading at Stifel Nicolaus & Co. in Baltimore.
He cited a continuing "unwind of the premium we saw in commodities."
The 3-month U.S. Treasury bill yield traded just above 0.5 percent <US3MT=RR>. The benchmark 10-year U.S. Treasury note was down 6/32, with the yield at 3.3503 percent.
In Asia, resource and mining stocks fell, while renewed credit crisis fears also dragged down indexes across the region a day after investors had cheered hefty U.S. interest rate cuts and resilient results from leading U.S. investment banks.
MSCI's measure of Asian stocks outside Japan <.MIAPJ0000PUS> fell 2.19 percent.
Key stock market indexes in Australia <
> and Hong Kong < > dropped more than 3 percent as resource firms such as BHP Billiton <BHP.AX>, the biggest miner, and Petrochina <0857.HK>, the most valuable energy producer, slumped.Markets in Japan and other Asian countries were closed for holidays, and most will remain closed on Friday. (Additional reporting by Caroline Valetkevitch, John Parry and Vivianne Rodrigues in New York, and Pratima Desai, Maryelle Demongeot and Anna Ringstrom in London. Editing by Richard Satran)