* U.S. stocks extends gains, Europe rebounds on oil slide
* Oil slips $6 a barrel on rise in U.S. crude inventories
* Dollar rises as Bernanke discusses currency intervention (Recasts throughout with U.S. market focus, adds byline; dateline previous LONDON)
By Herbert Lash
NEW YORK, July 16 (Reuters) - U.S. stocks jumped and European equities rebounded on Wednesday after oil prices slid on news of an unexpected leap in U.S. crude supplies last week and a big U.S. bank posted unexpectedly strong results, easing investor fears about the bank sector.
Spot gold prices tumbled about 2 percent as oil slid and the dollar extended gains after Federal Reserve Chairman Ben Bernanke said currency intervention may be warranted under certain conditions.
Prices of U.S. government debt fell, after data showed U.S. consumer price inflation accelerated in June.
U.S. crude oil futures fell more than 4 percent after a U.S. government agency reported a surprise uptick in import levels, causing crude prices to tumble for the second day.
Prices for a barrel of oil are down almost $15 over the past two days, touching a three-week low, and the fall was enough to help spur a rally on Wall Street, where equity markets had slipped entirely into a bear market earlier this week.
All major U.S. stock indexes were trading about 1 percent higher, and an index of top European shares closed higher, a day after hitting a three-year closing low.
Stronger-than-expected quarterly results by Wells Fargo <WFC.N>, the fifth-largest U.S. bank, helped turn a sour mood on Wall Street that has seen banking shares slide to decade lows as the sector looks for still more capital after record infusions.
Wells Fargo raised its dividend by 10 percent despite a 23 percent decline in profit caused by a surge in bad loans, and its shares surged more than 22 percent to $25.12. Despite the weak economy, the bank's chief executive, John Stumpf, said Wells Fargo was "one of the best positioned in financial services to growth through this adversity."
The results offered a beacon of hope for investors who have worried about the impact of the credit crisis on the financial sector.
Before midday, the Dow Jones industrial average <
> was up 102.50 points, or 0.94 percent, at 11,065.04. The Standard & Poor's 500 Index <.SPX> rose 9.34 points, or 0.77 percent, at 1,224.25. The Nasdaq Composite Index < > was up 32.44 points, or 1.46 percent, at 2,248.15.European shares turned positive after crude fell and in response to Bernanke's comments about currency intervention.
The FTSEurofirst 300 <
> index of top European shares closed up 0.44 percent to 1,114.97 points.BANK OPTIMISM LIFTS DOLLAR
The optimism over results at Wells Fargo helped lift the dollar against the euro as the bank offered a long-awaited sign of stability in the U.S. financial system.
"The dollar is likely to benefit only marginally at this point from economic data. On the other hand, if banks' earnings come on the positive side, we may see a stronger dollar," said Omer Esiner, market analyst at Ruesch International in Washington.
The dollar extended gains after Bernanke told lawmakers that currency intervention is "something that should be done only rarely, but there may be conditions in which markets are disorderly where some temporary action may be justified."
The dollar rose against major currencies, with the U.S. Dollar Index <.DXY> up 0.37 percent at 71.968. Against the yen, the dollar <JPY=> fell 1.30 percent at 104.76.
The euro <EUR=> fell 0.38 percent at $1.5843.
Investors had a mixed reaction to a larger-than-expected jump in U.S consumer prices for June, the largest rise since September 2005, given that it increased uncertainty about the outlook for higher interest rates even as the economy slows.
Bonds prices fell. The U.S. 30-year Treasury bond <US30YT=RR> fell 2 full points to yield 4.59 percent.
The benchmark 10-year U.S. Treasury note <US10YT=RR> fell 24/32 to yield 3.92 percent.
In commodities markets, oil futures fell after U.S. government data showed U.S. crude oil stocks rose 3 million barrels last week. Analysts had predicted a fall of 2.1 million barrels.
U.S. light sweet crude oil <CLc1> fell $4.57 to $134.17 per barrel.
Spot gold prices <XAU=> fell $8.85 to $962.85. (Reporting by Ellis Mnyandu, Richard Valdmanis, Nick Olivari, Vivianne Rodrigues, John Parry and Richard Leong in New York and Jane Merriman in London; Writing by Herbert Lash; Editing by Leslie Adler)