The CEOs spoke amid an unprecedented period of market turmoil that has included the Fed 's backing for the takeover of investment bank Bear Stearns Cos by JPMorgan Chase ( JPM.N : Quote , Profile , Research , Stock Buzz ) in March , the rescue of mortgage giants Fannie Mae ( FNM.N : Quote , Profile , Research , Stock Buzz ) and Freddie Mac ( FRE.N : Quote , Profile , Research , Stock Buzz ) earlier this month , the bankruptcy filing of investment bank Lehman Brothers Holdings ( LEH.N : Quote , Profile , Research , Stock Buzz ) on Monday , and the government bailout of insurer American International Group Inc ( AIG.N : Quote , Profile , Research , Stock Buzz ) on Tuesday .