* Global stocks fall as deep recession fears grip markets
* U.S. crude futures drop to 20-month low under $57 barrel
* Government debt advances as stock losses spur safety bid
* Yen soars across the board, dollar to yen falls below 95 (Recasts with U.S. markets, adds byline; changes dateline; previous LONDON)
By Herbert Lash
NEW YORK, Nov 12 (Reuters) - Crude oil prices slid to a 20-month low and stock markets around the world slumped on Wednesday as fears that consumer spending will plunge and spur a deep global slowdown drove investors to less risky assets.
A shift in how the U.S. government plans to spend what's left in its $700 billion bailout fund also roiled markets after U.S. Treasury Secretary Henry Paulson said he was backing away from buying troubled mortgage assets.
Paulson's comments underscored the head winds the U.S. economy faces, adding to the slide in stocks and feeding a bid for such safe-haven assets as U.S. and euro-zone government debt, and the yen.
"This is bringing uncertainty into the market, creating a sense that the Treasury doesn't know what it's doing," said Philippe Gijsels, strategist at Fortis in Brussels. "Now people are talking of re-testing the year lows."
The threat of deflation, which would hurt corporate profits, also slammed stocks and made risk-averse investors steady buyers of U.S. Treasuries.
Sterling tumbled to a six-year low against the dollar and a record trough against the euro after the Bank of England warned the British economy will shrink sharply next year. Its governor bolstered expectations of aggressive interest rate cuts.
The pound traded as low as $1.4898 <GBP=>, the weakest since June 2002, and the U.S. dollar fell sharply against the yen as investors shunned riskier assets.
News from Europe "just reinforced market expectations that global recession is still in the cards," said Ronald Simpson, managing director of global currency analysis for Action Economics in Tampa, Florida. "We're probably going to continue to see downward pressure on the euro and the pound in particular."
Best Buy <BBY.N>, the largest U.S. electronics chain, lowered its outlook on signs that consumer spending is falling fast. Its shares fell 6.9 percent, and the S&P retail index <.RLX> fell 3.7 percent.
After 1 p.m., the Dow Jones industrial average <
> was down 213.78 points, or 2.46 percent, at 8,480.18. The Standard & Poor's 500 Index <.SPX> was down 24.16 points, or 2.69 percent, at 874.79. The Nasdaq Composite Index < > was down 40.38 points, or 2.55 percent, at 1,540.52.European shares slid, led by banks and oil companies on worries of more losses and a darkening economic picture, and as Wall Street fretted over changes to the U.S. government's financial sector bailout plan.
The FTSEurofirst 300 <
> index of top European shares ended 3.4 percent lower at 853.88 points.BP <BP.L>, StatoilHydro <STL.OL> and Banco Santander <SAN.MC> were the biggest drags on the benchmark index.
BP fell 4.6 percent, StatoilHydro shed 10.7 percent and Santander fell 7.6 percent.
Crude oil prices fell more than 4 percent on expectations of weaker energy demand and as global stock markets headed south.
The bearish tone was set by the International Energy Agency, which said a slowing world economy may force it to cut further its forecast for oil demand growth when it releases its latest monthly report on Thursday.
The fall in oil prices prompted officials from the Organization of Petroleum Exporting Countries to say they might cut oil production further.
U.S. light sweet crude oil <CLc1> fell $2.27 to $57.06 a barrel.
The dollar rose against a basket of major currencies, with the U.S. Dollar Index <.DXY> up 0.14 percent at 87.198. Against the yen, the dollar <JPY=> was down 1.92 percent at 95.81.
The euro <EUR=> rose 0.26 percent at $1.255.
The benchmark 10-year U.S. Treasury note <US10YT=RR> rose 14/32 to yield 3.71 percent, and the 2-year U.S. Treasury note <US2YT=RR> rose 3/32 to yield 1.22 percent.
Spot gold prices <XAU=> fell $7.30 to $723.70 an ounce.
Japan's Nikkei average <
> shed 1.3 percent on the lightest volume in about six weeks, while the MSCI benchmark index of Asian stocks outside of Japan <.MIAPJ0000PUS> lost 0.8 percent. (Reporting by Wanfeng Zhou, Ellen Freilich in New York and Christopher Johnson, George Matlock and Sitaraman Shankar in London; writing by Herbert Lash; Editing by Leslie Adler)