First Boston, 2 Traders Fined: The New York Stock Exchange imposed the fines over stock trades First Boston Corp. traders made on the company's behalf at better prices than the ones they executed for their clients. First Boston, a unit of CS Holding, which owns one of Switzerland's biggest banks, agreed to pay a $200,000 fine after the NYSE found it failed to adequately supervise two traders, C. William Cox and Francis J. Kelly. The NYSE fined Cox and Kelly $40,000 each. Cox executed an order for an institutional client in May 1991 while buying shares of the same stock for the firm's account at a preferable price. In April 1992, Kelly bought shares for First Boston at a better price than that offered to a client. Cox did not return a phone call; Kelly could not be reached.