FED BUYS 500 MLN DLRS OF BILLS FOR CUSTOMER

  The Federal Reserve purchased about
  500 mln dlrs of U.S. Treasury bills for a customer, a
  spokeswoman said.
      She said that the Fed bought bills maturing in June and
  July, and on August 27 and September 10 for regular delivery
  tomorrow.
      Dealers said that Federal funds were trading at 6-1/8 pct
  when the Fed announced the operation.
  

