sluggish day of trading where only 1,482 shares, valued at $22,140, changed hands. The Exchange Index was pulled down by a 25 cent drop in Bank of Butterfield shares to $13.75 on volume of 832. Bank of Bermuda, on volume of 500, was unchanged at $19 and Bermuda Press (Holdings) Ltd. was unchanged at $8 on volume of 150 shares. Stocks, chart -- Page 12