NEW YORK, May 28 (UPI)ÛÓInvestors, uncertain over the status of high interest rates, marked time today and prices edged lower in light trading on the New York Stock Exchange.</br></br>Arthur Burns, chairman of the Federal Reserve Board, indicated during the Memorial Day weekend that the Fed would not ease its tight-money stance. This could prompt further increases in interest rates which are at record levels.</br></br>The stock market appeared encouraged Friday when major banks did not raise the prime rateÛÓthat charged their most creditworthy corporate customers. But BurnsÛª statement cooled the enthusiasm which had prompted a rally late Friday.</br></br>The Dow Jones industrial average reflected this concern. It lost 2.35 to 814.30,. after having been ahead around 3 points at the outset. The NYSE index of 1,-500 listed stocks lost 0.10 to 46.49.</br></br>Standard & PoorÛªs 500-stock index was down 0.21 at 88.37. Declines topped advances by 697 to 657 among the 1,753 issues crossing the tape.