By MARK LANDLER ,
 HEATHER TIMMONS


FRANKFURT — Fears that the United States is in a recession reverberated around the world on Monday, sending stock markets from Frankfurt to Bombay into a tailspin and puncturing the hopes of many investors that Europe and Asia will be able to sidestep an American downturn.

On a day when United States markets were closed in observance of Martin Luther King’s Birthday, the world’s eyes were trained nervously on the United States. Investors reacted with what many analysts described as panic to the multiplying signs of weakness in the American economy.

Shares of banks led the decline in many countries, underscoring that the subprime crisis continues to hobble the global financial system. On Monday, a big German state bank, WestLB, said it would report a loss of $1.4 billion in 2007 because of its exposure to deteriorating mortgage assets.

“There is indeed some panic,” said Thomas Mayer, the chief European economist at Deutsche Bank in London. “What we’re seeing, in Europe and Asia, is that the markets are pricing in a recession.”

The sell-off was evenly distributed from West to East, with indexes plunging in London, Paris, Frankfurt, Tokyo, Hong Kong, Seoul and Bombay. The Frankfurt Stock Exchange’s Dax index plummeted 7.2 percent, its steepest one-day decline since Sept. 11, 2001. The 7.4 percent drop in Bombay’s Sensex index was the second-worst single-day tumble in its history.

Stocks followed suit when markets opened in the Western Hemisphere. Canadian stocks were down 4 percent in early afternoon, and a key market index in Brazil was off almost 6 percent.

And trading Monday in stock index futures, while light and not always a reliable indicator, pointed to a substantial decline when markets reopen on Wall Street. Futures in the Dow Jones industrial average were down 520 points, or more than 4 percent.



Investors were scarcely comforted by President Bush’s announcement on Friday of an economic stimulus package of as much as $145 billion. Mr. Bush’s “shot in the arm,” economists said, did not persuade the rest of the world that the United States will escape a recession, or that it will either.

The turmoil will put even more pressure on the