From The NY Times
By Paul Krugman

Last month, when the U.S. Treasury Department allowed Lehman Brothers to fail, I wrote that Henry Paulson, the Treasury secretary, was playing financial Russian roulette. Sure enough, there was a bullet in that chamber: Lehman’s failure caused the world financial crisis, already severe, to get much, much worse.

The consequences of Lehman’s fall were apparent within days, yet key policy players have largely wasted the past four weeks. Now they’ve reached a moment of truth: They’d better do something soon — in fact, they’d better announce a coordinated rescue plan this weekend — or the world economy may well experience its worst slump since the Great Depression.

Let’s talk about where we are right now.

The current crisis started with a burst housing bubble, which led to widespread mortgage defaults, and hence to large losses at many financial institutions. That initial shock was compounded by secondary effects, as lack of capital forced banks to pull back, leading to further declines in the prices of assets, leading to more losses, and so on — a vicious circle of “deleveraging.” Pervasive loss of trust in banks, including on the part of other banks, reinforced the vicious circle.

The downward spiral accelerated post-Lehman. Money markets, already troubled, effectively shut down — one line currently making the rounds is that the only things anyone wants to buy right now are Treasury bills and bottled water.

Read more Truth