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Pinto How Did Paul Krugman Get It So Wrong
...Let’s start with the assertion that GSEs only buy mortgages made to borrowers with substantial downpayments. While it is generally accepted that a substantial down payment would be 20% or more of a home’s value, let’s be charitable and call a down payment of 10% or more substantial. Over the period 1992-2007 Fannie and Freddie acquired $1.3 trillion in home purchase loans with a 5% or less, amounting to 62% of all such conventional loans originated nationwide over the same period.

These loans are now defaulting at 7-8 times the level of the GSEs’ traditionally underwritten loans with <=90% LTV. Fannie started buying loans with only 3% down as early as 1994 and by 2000 Fannie was buying loans with no downpayment. How about Krugman’s claim that the GSEs didn’t do any subprime lending? Over the period 1997-2007 they acquired a total of $2.2 trillion in subprime loans and private securities backed by subprime loans. Conventional subprime loans came in two “flavors”. The first group consisted of loans with a FICO score of less than 660 (a regulatory definition of subprime), loans which Fannie now says are similar to subprime loans in risk but have not been classified by it as subprime. The GSEs acquired $1.5 trillion of this type of subprime loan. These loans are now defaulting at 8-9 times the level of their traditionally underwritten loans with a FICO >=660. A second group consisted of private mortgage backed securities backed by subprime loans denominated as such by the originator. The GSEs acquired $700 billion of these securities, amounting to 33% of all such privately issued subprime securities. The loans backing these securities are now defaulting at 18-19 times the level of the GSEs’ traditionally underwritten loans with a FICO >=660.