I should probably make up some tenuous connection to the stress tests so it seems that I have some reason for quoting this bit of Keynes' General Theory , but really I just think it a brilliant point: [T]here is one feature in particular which deserves our attention. It might have been supposed that competition between expert professionals, possessing judgment and knowledge beyond that of the average private investor, would correct the vagaries of the ignorant individual left to himself. It happens, however, that the energies and skill of the professional investor and speculator are mainly occupied otherwise. For most of these persons are, in fact, largely concerned, not with making superior long-term forecasts of the probable yield of an investment over its whole life, but with foreseeing changes in the conventional basis of valuation a short time ahead of the general public. They are concerned, not with what an investment is really worth to a man who buys it “for keeps”, but with...

Here's why: Unemployment -- in their negative scenario, the stress tests assumed a year-round average unemployment rate of 8.9 percent for the 2009 and 10.3 percent for 2010. The economy is on track to have a much higher unemployment rate, as it is likely to hit 9.0 percent in April. My best guess for a year-round average would be 9.4 percent for 2009 and probably around 10.5 percent for 2010. (These numbers assume no second stimulus, but of course Congress will not sit back and just let the unemployment rate go through the roof.) House prices -- the negative scenario assumes that house prices, as measured by the Case-Shiller 10-City index fall 22.0 percent in 2009. Prices in this index have been falling at a 24 percent annual rate in recent months. Given the massive inventory of unsold homes, It is reasonable to expect that this rate of price decline could continue at least through 2009. What difference would harsher assumptions make? The projected loss rate on first mortgages...