The Royal Gazette/Bermuda Stock Exchange Index gained 25 points yesterday to close at 4,386.50. On a quiet day on the Exchange, Butterfield Bank rose 50 cents to close at $56.60 as investors traded in 1,858 shares and Bermuda Commercial Bank gained 25 cents to close at $8 as 5,250 shares changed hands. The total value of the shares bought and sold on the BSX yesterday was 145,575.00 and the overall volume of shares was 7,108.