The Securities and Exchange Commission approved telemarketing...

The Securities and Exchange Commission approved telemarketing rules aimed at curbing “cold call” abuses in the sale of municipal bonds, which are a companion to similar standards adopted by the SEC earlier this month that govern cold calls in the sale of stocks and bonds. . . . San Mateo-based Vivra Inc. said it received a federal grand jury subpoena that focuses on its former joint venture with Corning Inc.’s Damon Clinical Laboratories unit, as well as its Medicare and Medicaid billing practices. . . . The National Assn. of Securities Dealers again postponed--this time until January--its announcement of a replacement for retiring Chief Executive Joseph Hardiman. . . . Johnson & Johnson said it won approval from the Food and Drug Administration to sell its new epilepsy drug Topamax, also known as topiramate, which can help prevent the most common type of epileptic seizure. . . . Coca-Cola Co. said it has begun selling a line of tea and fruit drinks made for the Taiwanese market called Fei Yang, or “Flying High.” . . . Unocal Corp. said it will begin buying back as much as $400 million of its common stock. . . . Pharmacia & Upjohn Inc. said it will cut the price of Rogaine, its baldness treatment, for six weeks starting Dec. 30. . . . Norfolk Southern Corp. pressed its hostile bid for Conrail Inc. by asking a federal board to invalidate a provision that blocks Conrail from accepting takeover offers from any company except CSX Inc.