Bond Rating Services and the Mortgage Meltdown

There's an important article in this week's New York Times Magazine explaining the role of bond ratings services like Moody's in the current mortgage mess. As "Triple-A Failure" by Roger Lowenstein, 04/27/08 New York Times Magazine, explains:

By providing the mortgage industry with an entree to Wall Street, the agencies also transformed what had been among the sleepiest corners of finance. No longer did mortgage banks have to wait 10 or 20 or 30 years to get their money back from homeowners. Now they sold their loans into securitized pools and — their capital thus replenished — wrote new loans at a much quicker pace.

The article concludes:

This leaves an awkward question, with respect to insanely complex structured securities: What can they rely on? The agencies seem utterly too involved to serve as a neutral arbiter, and the banks are sure to invent new and equally hard-to-assess vehicles in the future. Vickie Tillman, the executive vice president of S.&P., told Congress last fall that in addition to the housing slump, “ahistorical behavorial modes” by homeowners were to blame for the wave of downgrades. She cited S.&P.’s data going back to the 1970s, as if consumers were at fault for not living up to the past. The real problem is that the agencies’ mathematical formulas look backward while life is lived forward. That is unlikely to change.