Problems for Basel?
Has the subprime crisis undermined Basel II? Willem Buiter (ex-MPC, now a professor at the LSE) thinks so, in fairly direct terms:
Two crucial inputs into Pillar 1... have been severely compromised by the recent financial markets turmoil...It is clear that, as regard rating complex structured products, the three internationally recognised rating agencies have done a terrible job... There appears to be a systematic bias in the ratings. If rating were merely difficult, you would expect as many over-ratings as under-ratings. What we see instead, is a persistent bias: ratings seem to systematically over-estimate the creditworthiness of the rated instrument or structure...I am not asserting that the rating process of complex financial instrument is unavoidably utterly corrupt and useless, although some of it probably is...
Nor, he points out, has the recent turmoil provided many reasons to trust banks' internal models - as B2 allows. The solution? Severe limits on the activities of rating agencies, to prevent conflicts of interest, and on the use of complex products.
I can see no way the crippling conflict of interest can ever be resolved for anything other than the simplest structured products - those for which even the CEO can understand the principles underlying the model and the numbers going in and coming out... In any case, if a financial product is too complex for its valuation to be understood by the average Joe, it probably contributes negative marginal social value.
The second part is unlikely to happen - but the question of how ratings agencies should carry on is still very much open.


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