U.S. regulators seized California savings and loan company IndyMac Bank and its $32 billion in assets.

Investors are scanning the banking industry for signs of more trouble after the biggest U.S. bank failure in more than two decades. Last week, U.S. regulators seized California savings and loan company IndyMac Bank and its $32 billion in assets. Troubles are mounting so quickly at some of the country's 7,500 banks that as many as 150 could fail over the next year or so, analysts said. Healthier banks are expected to shut branches or merge.