The Big Picture has the most scathing critique I've seen yet of the stupid right-wing idea that the liberals and the poor caused the current credit crisis:

Understand this simple fact: In an ultra-low rate environment, where prices are appreciating rapidily, and mortgaes are being securitized, ALL THAT MATTERS IS THAT THE BORROWER NOT DEFAULT IN 90 days (or 6 Months). The goal was to make a loan that did not default in that period of time, it cannot be put back to the originator.

As a mortgage salesman, you only lose your a fee if a borrower defaults within 3 or 6 months. What do you do to maximize your returns? The best way to do that -- to put people in houses that would not default in 90 days -- was the 2/28 ARM mortgages. Cheap teaser rates for 24 months, then the big reset. By then, it was no longer your problem.

Can you grasp what a monumental change this was? Instead of making sure that borrowers could pay back ALL OF THE 30 YEAR FIXED MORTGAGE, you only had to find people who could afford the teaser rate for a a few months. THIS WAS AN ENORMOUS AND UNPRECEDENTED SHIFT IN LENDING.