Fed and Rival Bail Out Bear Stearns

The rescue came from JPMorgan Chase & Co. and, in an extraordinary step, the Federal Reserve, both rushing to pump new money into the venerable Wall Street firm after its financial state deteriorated so much in a 24-hour period that it threatened to fail.

Bear Stearns stock lost nearly half its market value, about $5.7 billion, in a matter of minutes, and pulled the broader market down with it. The Dow Jones industrial average fell nearly 200 points.

If Bear Stearns were to go under, "it has the potential of bringing down the whole market," said Richard Bove, an analyst at Punk, Ziegel & Co. "This is the crescendo of the crisis."

JPMorgan and the central bank agreed to extend loans for 28 days to Bear Stearns, the nation's fifth-largest investment bank and the one hit hardest by the subprime mortgage mess.

Two hedge funds managed by Bear Stearns failed last summer, setting off a credit crisis that has swept up banks and brokerages around the globe.

In backing up JPMorgan, the Fed dusted off a rarely used, Depression-era provision to provide loans. It also said it was ready to step in to fight an erosion of confidence in the nation's largest financial institutions.

Officials from the Fed and the Securities and Exchange Commission held conference calls throughout the day Thursday to assess the potential impact on the broader economy, according to a Treasury official, who spoke on condition of anonymity because of the sensitive nature of the discussions.

For Bear, the crisis started when market speculation grew that it might have to seize collateral mostly mortgage-backed securities worth next to nothing from the private equity firm Carlyle Group.

Carlyle runs a bond fund and has come under intense pressure during the past week from creditors demanding collateral to back their investments.