Southern California Edison reported that the California Public Utilities Commission may decrease the firm's rate of return in 1987 to 13.9%. An incorrect number appeared in Friday's edition's of the Business section . . . Reliance Capital said it has filed a revised application with the Federal Communications Commission for short-term approval of voting trust arrangements for shares of John Blair & Co. . . . Triangle Industries said that, as part of its refinancing program, it has repurchased $225 million of high-cost debt incurred in connection with its purchase of National Can . . . Kaiser Steel said it agreed in principle to provide some additional collateral to GATX Leasing Corp. under an existing lease agreement as required in a previously announced extension of Kaiser's bank loans . . . The Federal Deposit Insurance Corp. has approved the acquisition of Lloyds Bank California, a unit of London-based Lloyds Bank, by Golden State Sanwa Bank, a subsidiary of Sanwa Bank Ltd. of Japan . . . The Investment Company Institute reported that the assets of the nation's 362 money-market mutual funds soared $4.08 billion in the week ended July 16.