(Recasts; adds oil prices details, prices throughout)
By Herbert Lash
NEW YORK, March 4 (Reuters) - Fears surrounding global banks depressed stocks worldwide on Tuesday and recession worries triggered profit-taking among economically sensitive commodities which have rallied to all-time highs in recent days.
Oil prices tumbled more than 3 percent to below $100 a barrel as OPEC prepared to meet on Wednesday. The drop in crude futures dragged gold along with it just as the precious metal approached a record near $1,000 an ounce. Its 2 percent fall reversed hefty gains initially.
The financial markets recovered from their worst levels late in the New York session on talk that bond insurer Ambac Financial Group Inc <ABK.N> may be nearer a restructuring that could help the troubled company continue as a going concern.
The dollar also turned higher against the yen late in the day as U.S. stocks trimmed losses on talk of the Ambac plan, one of the few potential beacons of light in a bleak banking scenario. Ambac plays a key role in facilitating bond trading liquidity.
Bonds also shifted course, turning swiftly lower from initial gains as stocks pared losses, curbing safe-haven bids for Treasuries.
The benchmark 10-year note's <US10YT=RR> price -- which moves inversely to its yield -- fell 19/32 for a yield of 3.62 percent, compared with 3.55 percent late on Monday.
Earlier, the dollar had fallen versus the yen and Swiss franc after Federal Reserve Chairman Ben Bernanke warned that U.S. mortgage delinquencies and foreclosures are likely to continue hitting banks as home prices decline further.
"Investors are concerned about the width and depth of the problems in subprime and real estate. It has not gone away, and every couple of days, it rears its ugly head," said Paul Nolte, director of investments at financial adviser Hinsdale Associates in Hinsdale, Illinois.
Banking and credit woes were highlighted by concerns that Citigroup Inc, the largest U.S. banking company, could need $15 billion more capital after already raising double that amount of from investors including Abu Dhabi, Kuwait and Saudi Prince Alwaleed bin Talal. A Merrill Lynch analyst made the projection based on further mortgage write-downs.
"It's going to take more than that (amount already raised) to rescue Citi," said Sameer al-Ansari, head of investment agency Dubai International Capital, at a private equity conference in Dubai.
The Dow Jones industrial average .DJI> ended down 45.10 points, or 0.37 percent, at 12,213.80 in volatile trading.
The broad-based Standard & Poor's 500 Index .SPX> toyed with falling to a 17-month low during the session, but closed slightly above a low set Jan. 22, up 4.60 points at 1,326.74.
The S&P is still off about 15 percent from a peak set in October, and about 10 percent so far this year.
Citigroup, the largest U.S. bank, closed down 4.3 percent at $22.10.
European shares fell for a fifth consecutive day as concern over banks' future earnings also weighed on financials and a weaker outlook from U.S. chipmaker Intel sent technology stocks lower.
The pan-European FTSEurofirst 300 index .FTEU3> closed 1.4 percent lower, a six-week closing low.
Banking stocks were the weakest sector and the heaviest weight on the European benchmark index with HSBC falling 2.7 percent, UBS down 3.4 percent and UniCredit down 2.4 percent.
Technology stocks fell after Intel said weaker prices for some of its memory chips could hurt profits, adding to worries about technology sector spending and growth. But optimistic words on the economy from Cisco's chief John Chambers late in the day sharply cut the losses.
In speaking to a group of community bankers. Bernanke urged a vigorous response to stabilize housing markets and said banks may have to write down the principal of some troubled home loans to ward off greater losses that could result from outright defaults.
His outlook for more painful writedowns, together with expectations of more Fed rate cuts, triggered buying in treasuries initially.
Verbal intervention by euro finance ministers ahead of the European Central Bank meeting on Thursday halted the euro's five-day run of record highs versus the dollar.
In late afternoon in New York, the dollar was 0.2 percent higher at 103.44 yen <JPY=>, after it touched a session low of 102.66, near a three-year trough reached on Monday.
The euro was flat at $1.5205 <EUR=>, off the $1.5275 all-time high set on Monday, according to Reuters data. The dollar index <.DXY>, which tracks the value of the greenback against a basket of currencies, slid 0.1 percent to 73.689.
The euro was also little changed at 157.03 yen <EURJPY=> but dropped 0.4 percent to 1.5783 Swiss francs <EURCHF=>. Against the Swiss currency, the dollar declined 0.4 percent to 1.0381 Swiss francs <CHF=>.
U.S. light crude for April delivery <CLc1> settled $2.93 lower, or 2.9 percent, at $99.52 a barrel, off an all-time high of $103.95 set Monday on expectations the Organization of Petroleum Exporting Countries would hold output steady at its meeting in Vienna.
London Brent crude <LCOc1> settled $2.96 lower at $97.52. (Writing by Herbert Lash; editing by Richard Satran, Gary Crosse)