JoeyDVivre Wrote:
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> Nah. As soon as you trade CDS on a name, the
> rating is just a trailing (distant trailing)
> indicator of its spread.
Moody’s Market-Implied Ratings folks disagree. They’ve studied what happens when analyst rating and MIR differ by 3+ notches. In appx 1/3 of such cases, the analyst rating adjusts toward the MIR; 2/3 of the time the MIR adjusts toward the analyst rating. I believe this result holds for both bond- and cds-implied ratings.
When events occur of course published ratings, which by design exhibit considerable hysteresis, trail market prices – and this is frequently the source of several spectacular counterexamples to the general finding above. But over the universe of ~7k rated and traded companies, credit markets usually overreact.