Butterfield Bank gained again on the Bermuda Stock Exchange yesterday.The Bank’s shares rose 5 cents or 4 percent to close at $1.30 on a volume of 27,400.It was the only trade of the day on the BSX.Overall the BSX closed up 23.70, or 2.19 percent, to end at 1,105.17.The BSX Insurance Index closed down 6, or -0.55 percent, to end at 1081.00