American Express is added to the blue-chip stock index
American Express last week joined the most exclusive club in U.S. business: the often quoted Dow Jones index of 30 leading industrial companies. No one was more surprised than Amex officials when they learned that they were replacing the ailing Manville Corp. on the blue-chip list that includes Exxon, General Motors, A. T. & T. and other giant firms. Said Amex Chairman James Robinson III: "We are simply delighted." Added Sanford Weill, chairman of the firm's executive committee and Shearson/American Express, the second largest...