* Global stocks fall on prospect of automakers' bankruptcy
* U.S. dollar, yen rise on renewed risk aversion jitters
* Bond prices, gold rise on flight to safety
* Oil falls on stronger dollar, sliding equity markets (Recasts with U.S. markets, changes dateline, previous LONDON)
By Herbert Lash
NEW YORK, March 30 (Reuters) - Global stocks skidded on Monday as President Barack Obama's harsh medicine for ailing U.S. automakers threatened bankruptcy for General Motors and Chrysler, and oil fell below $50 a barrel on the slumping equity markets and a stronger dollar.
The dollar and yen rallied on fears the two automakers may be forced into bankruptcy after Obama rejected their turnaround plans, prompting anxious investors to cut exposure to risk and seek safety in the two currencies.
Gold also firmed as investors sought safety, but gold futures later turned lower on the stronger dollar.
Bank rescues in Europe weighed on financial shares on both sides of the Atlantic, while the renewed concerns about banks and automakers lifted U.S. and European government debt prices.
The flare-up of woes in the banking and auto industries unnerved investors who bid up stocks and the dollar in recent weeks on hopeful signs the economic downturn might be bottoming.
The European efforts "really just hammer home the fact that this crisis is worldwide and we know Europe's in worse shape than we are," said Ryan Detrick, senior technical strategist at Schaeffer's Investment Research in Cincinnati.
"The fear that they're nationalizing just leads to more selling of our banks here, it's all really intertwined."
European markets fell after Spain was forced into its first bank rescue since the financial crisis began and Germany and Britain also acted to shore up lenders as the sector awaited the brunt of the impact of rising bad loans. [
]"Sentiment starts to change a bit and people realize that maybe the government can't keep on bailing people out and they indicate that with the auto today," said Philip Gillett, sales trader at IG Index. "It puts a bit of fear into the market."
Adding to the bank worries were comments from U.S. Treasury Secretary Timothy Geithner on Sunday that some banks still need substantial aid. He said the government will have about $135 billion left after other banks give back some of the bailout money, but declined to say if he would ask Congress for more. [
]The U.S. government's rejection of turnaround plans for GM <GM.N> and Chrysler added to already dampened investor sentiment and exacerbated the sell-off in stocks.
The MSCI all-country world index <.MIWD00000PUS> fell 4.2 percent, almost wiping out last week's 4.5 percent gain.
After 1 p.m., the Dow Jones industrial average <
> was down 276.46 points, or 3.56 percent, at 7,499.72. The Standard & Poor's 500 Index <.SPX> was down 29.24 points, or 3.58 percent, at 786.70. The Nasdaq Composite Index < > was down 49.99 points, or 3.24 percent, at 1,495.21.Among bank shares, Citigroup <C.N> tumbled about 9 percent and Bank of America <BAC.N> dropped 15 percent. The KBW Bank index <.BKX> shed 7.2 percent.
Banks and commodity stocks led European markets lower, with the FTSEurofirst 300 <
> index of top regional companies closing down 3.85 percent at 709.10 points.Banks took the most points off the index on news that Spain would bail out regional savings bank Caja Castilla la Mancha, the first Spanish banking rescue since the crisis began. Spain said it will provide 9 billion euros ($12.1 billion) in government guarantees to back the bank [
].Oil fell more than 6 percent and copper tumbled 4 percent as a persistently weak demand outlook put a brake on an impressive rally this month in commodity prices.
"Stock markets have taken a bit of a pounding, the dollar has improved and the U.S. car industry news -- these have all put a lot of pressure on oil markets this morning," said Rob Montefusco, a trader at Sucden Financial in London.
U.S. light sweet crude oil <CLc1> fell $3.46 to $48.92 a barrel.
Spot gold prices <XAU=> fell $4.65 to $916.40.
The euro continued to retreat from last week's two-month high above $1.37, falling below $1.32.
The euro <EUR=> fell 1.02 percent at $1.3163.
The dollar rose against a basket of major currencies, with the U.S. Dollar Index <.DXY> up 0.84 percent at 85.857. Against the yen, the dollar <JPY=> fell 0.46 percent at 97.40.
The benchmark 10-year U.S. Treasury note <US10YT=RR> rose 10/32 in price to yield 2.73 percent. The 2-year U.S. Treasury note <US2YT=RR> rose 3/32 in price to yield 0.875 percent.
The MSCI index of Asia-Pacific stocks outside Japan <.MIAPJ0000PUS> extended losses, falling 4.7 percent. Japan's Nikkei average <
> fell 4.5 percent. (Reporting by Chuck Mikolajczak, Steven C. Johnson and Ellen Freilich in New York and Kirsten Donovan, Paul Lauener, Joe Brock, Dominic Lau and Joanne Frearson in London; writing by Herbert Lash; Editing by Leslie Adler)