 His articles described widespread improper trading at the American Stock Exchange and broke the story of the bond trading scandal at Salomon Brothers in 1991.Weiss also wrote essays and articles critical of the Securities and Exchange Commission and other regulators, and in 1995 a cover story exploring the early manifestations of online investing.In testimony before a U.S. Senate committee in 1991, Warren Buffett, then temporarily running Salomon Brothers, said that he learned of a bond trading scandal by reading Weiss' article in Business Week.