Wall Street's nervous about more bank rescues

Shares of Citigroup Inc. and other financial stocks soared Monday on a bet that a long line of government-funded financial bailouts could be nearing a close. But if the last few months have taught us anything, it's that new problems always seem to crop up.

New York-based Citigroup was widely known to have worse problems than many of its peers in the financial industry even as the government began doling out the first payments to it and seven other banks from the $700 billion relief program last month.

How much worse, though, is now a top question dogging investors. And until it's answered, it's not likely anyone will know if another major bank will need to …