Shares of Butterfield Bank dropped 2.3 percent ($0.03) in trading on the Bermuda Stock Exchange yesterday. 60,086 shares traded to close the week at $1.27.BF&M shares also traded closing up 1.3 percent ($0.20) at $16.00. 1,100 shares changed hands.Overall, the BSX ended the day down 12.84 points (1.16 percent) to close at 1.096.20.