* US auto woes, financial-sector fears dull risk appetite
* Dollar, yen up broadly, technically shaky euro slides
* Heavy event risk this week as ECB meeting looms
* Trichet says no decision yet on buying corporate debt (Updates prices, adds quotes, adds ECB's Trichet comment)
By Steven C. Johnson
NEW YORK, March 30 (Reuters) - The dollar and yen rallied on Monday as fears of bankruptcy for U.S. automakers General Motors and Chrysler prompted anxious investors to cut exposure to risk and seek safety in the U.S. and Japanese currencies.
The euro continued to retreat from last week's two-month high above $1.37, falling below $1.32 after Spain was forced to take over a regional savings bank, its first rescue since the financial crisis began, and Hungary's credit rating was cut.
That added to selling by those anticipating a cut in euro- zone interest rates this week and increased the appeal of the dollar and yen, which tend to rise in times of trouble as investors repatriate funds from higher-yielding currencies and relatively riskier assets such as stocks.
"The GM news was unsettling for the market and caused stocks to suffer globally," said Steven Butler, head of FX trading at Scotia Capital in Toronto. "Rising risk aversion makes the dollar look good in the short term."
U.S. stocks swooned after the Obama administration rejected funding pleas from GM <GM.N> and Chrysler and forced out GM's CEO, pushing the carmakers closer to possible bankruptcy.
The White House said it would fund GM only for the next 60 days while it develops a more convincing restructuring plan.
The euro was last down 1.2 percent at $1.3148 <EUR=>. near a session low of $1.3116, its lowest level since March 18. It lost 1.5 percent to 128.04 yen <EURJPY=>.
Analysts say $1.31 is the euro's next technical target on the downside because it marks the 50 percent retracement level of its March rally from $1.2455 to $1.3737.
Sterling fell 1.1 percent to $1.4165 <GBP=> while the dollar shed 0.5 percent to 97.40 yen <JPY=>, with risk aversion and Japan's financial year-end increasing demand for the yen.
ANXIETY RISES, ECB IN FOCUS
The GM news added to worries stoked over the weekend when U.S. Treasury Secretary Timothy Geithner said some banks will need large amounts of assistance -- remarks that BMO Capital Markets currency analyst Andrew Busch said "put the bull's eye back on the financial sector."
GFT Forex's Boris Schlossberg said Standard & Poor's move to cut Hungary's foreign currency rating "rubbed salt in the wound" for the euro by refocusing attention on recession in eastern Europe, a region to which euro-zone banks are exposed.
The European Central Bank is widely expected to cut interest rates to 1 percent on Thursday. Markets are keen to see if it will follow U.S., British and Japanese central banks in buying government or corporate debt to boost the availability of credit.
ECB President Jean-Claude Trichet said on Monday that no such decision has yet been made. He also said euro-zone growth is likely to remain sluggish this year before starting to rebound in 2010.[
]Dan Cook, a senior market analyst at IG Markets in Chicago, said the ECB may not be able to resist adopting unorthodox monetary policy for long, though.
"We still look to dollar strength as Trichet is eventually forced to move into this type of bond buying," he said.
Commenting on a Chinese proposal to create a global reserve currency, Trichet pointed to President Barack Obama's recent remark that there is no need for such a currency and Geithner's assertion that a strong dollar is in the U.S. interest.
"These are very, very important statements and I would not envisage anything else in the present circumstances, which are extraordinarily touchy," he said. [
] (Additional reporting by Nick Olivari; Editing by Jan Paschal)