How ratings agencies failed
Posted on April 24, 2008 by Richard Beddard
Filed Under Ramblings |
They relied on insufficiently sophisticated statistical models to evaluate over-sophisticated securities:
Moody’s used statistical models to assess C.D.O.’s; it relied on historical patterns of default. This assumed that the past would remain relevant in an era in which the mortgage industry was morphing into a wildly speculative business. The complexity of C.D.O.’s undermined the process as well. Jamie Dimon, the chief executive of JPMorgan Chase, which recently scooped up the mortally wounded Bear Stearns, says, “There was a large failure of common sense” by rating agencies and also by banks like his. “Very complex securities shouldn’t have been rated as if they were easy-to-value bonds.”
They probably gave their customers, the banks creating SPVs and CDOs [Collaterised Debt Obligations - effectively amalgamations of SPVs], the ratings they wanted:
The evidence on whether rating agencies bend to the bankers’ will is mixed. The agencies do not deny that a conflict exists, but they assert that they are keen to the dangers and minimize them. For instance, they do not reward analysts on the basis of whether they approve deals. No smoking gun, no conspiratorial e-mail message, has surfaced to suggest that they are lying. But in structured finance, the agencies face pressures that did not exist when John Moody was rating railroads. On the traditional side of the business, Moody’s has thousands of clients (virtually every corporation and municipality that sells bonds). No one of them has much clout. But in structured finance, a handful of banks return again and again, paying much bigger fees. A deal the size of XYZ can bring Moody’s $200,000 and more for complicated deals. And the banks pay only if Moody’s delivers the desired rating. Tom McGuire, the Jesuit theologian who ran Moody’s through the mid-’90s, says this arrangement is unhealthy. If Moody’s and a client bank don’t see eye to eye, the bank can either tweak the numbers or try its luck with a competitor like S.&P., a process known as “ratings shopping.”
[Via The Big Picture]
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