The greed engine can be erratic at times.

Dow Jones ends day below 10,000

Fear about prolonged credit crunch sparks global selloff

NEW YORK - Wall Street suffered through another extraordinary and traumatic session Monday, with the Dow Jones industrials plunging as much as 800 points — their largest one-day point drop — before recovering to close with a loss of 370. The catalyst for the selling, which also took the Dow below 10,000 for the first time in four years, was investors’ growing despair that the spreading credit crisis will take a heavy toll around the world.

Investors have come to the realization that the Bush administration’s $700 billion rescue plan and steps taken by other governments won’t work quickly to unfreeze the credit markets.

That sent stocks spiraling downward in the U.S., Europe and Asia, and drove investors to sink money into the relative safety of U.S. government debt. Fears about a global recession also caused oil to drop below $90 a barrel.