The BSX fell 1.73 points to 1,103.20 on a day of light trading.Five hundred shares of domestic companies changed hands, with 400 Bank of Butterfield shares trading with no change to the closing price of $1.30.Shares of BF&M dropped 25 cents after 100 were traded, closing at $16.00.The only other activity on the exchange was the trading of HSBC Holdings stock in the international companies listings. A total of 873 shares changed hands, with the stock closing at $11.30.