Rushing to rescue Citigroup, the government agreed to shoulder hundreds of billions of dollars in possible losses at the stricken bank and to plow a fresh $20 billion into the company.

Regulators hope the dramatic action will bolster badly shaken confidence in the once-mighty banking giant as well as the nation's financial system, a goal that so far has been elusive despite a flurry of government interventions to battle the worst global crisis since the 1930s.

Wall Street appeared encouraged as stock futures moved higher ahead of the market opening in New York. Dow Jones industrial average futures rose almost 2 percent. Stock markets in Britain and Germany gained more than 4 percent in afternoon trading. Citigroup shares themselves climbed 44 percent to $5.64 in premarket trading.

"If they didn't help, the damage would be beyond imagination," said Teck-Kin Suan, economist at United Overseas Bank in Singapore.

The action, announced late Sunday by the Treasury Department, the Federal Reserve and the Federal Deposit Insurance Corp., is aimed at shoring up a huge financial institution whose collapse would wreak havoc on the already fragile financial system and the U.S. economy.   - continue reading