After Corus, who's next to fail thanks to commercial real estate woes?

Friday the FDIC closed Corus Bank, which had $7 billion in assets and $3.9 billion in condominium construction loans.

What tanked Corus -- and what will hammer other banks -- is a rising inability of real estate companies to pay back their loans. How bad is it? Loans that borrowers have stopped repaying are up to 4.48 percent of total loans, from 2.09 percent in 2008. And banks are not setting aside reserves to match 100 percent of those non-performing assets (NPAs) the way analysts think they should.