AM Best Co. has commented that the financial strength rating of A and issuer credit ratings of ``a'' of the operating companies of Zenith National Insurance Corp. (NYSE:ZNT) and the ICR of ``bbb'' of Zenith remain unchanged following the announcement of a transaction under which Fairfax Financial Holdings Limited will acquire the 92% of Zenith shares that it does not currently own.
A.M. Best comments on the ratings of Zenith National Insurance Corp.