From Paul Krugman today
What’s going on in the markets isn’t an irrational panic. It’s a wholly rational panic, because there’s a lot of bad debt out there, and you don’t know how much of that bad debt is held by the guy who wants to borrow your money.
How will it all end? Markets won’t start functioning normally until investors are reasonably sure that they know where the bodies — I mean, the bad debts — are buried. And that probably won’t happen until house prices have finished falling and financial institutions have come clean about all their losses. All of this will probably take years.