FED WILL BUY BILLS FOR CUSTOMER AFTER AUCTION The Federal Reserve said it will enter the U.S. Government securities market after the 1300 EST weekly bill auction to purchase around 900 mln dlrs of Treasury bills for customers, a spokesman said. He said the Fed will purchase bills with maturities from May through September 10. Dealers said Federal funds were trading at 6-3/8 pct when the Fed announced the operation.