When Did the Stock Market Start to React Less to Downgrades by Moody’s, S&P and Fitch?
Moody’s, S&P and Fitch represent an oligopoly in the credit rating business, accounting for 94 percent of the global market (Candelon et al., 2014) and for about 96.5 percent of all the outstanding ratings in U.S.[1] The three agencies …