AIG Chairman and CEO Maurice Greenberg seems unfazed by the threat of a possible downgrade from its untarnished AAA rating.

Mr Greenberg assured investors last week that if ratings agency Moody’s was going to do something, it would have done so by now.

Concerns were raised after Munich Re, the world’s top reinsurer, saw its ratings cut by Standard and Poor’s last week. Mr Greenberg blamed speculative talk among investors for the stock’s recent setback, despite AIG’s AAA credit rating.

Although Moody’s is reportedly reviewing AIG, Mr Greenberg said he had met with the agency and is confident that the group’s rating will remain firm.