Butterfield Bank dropped 2.3 percent (three cents) on The Bermuda Stock Exchange (BSX) yesterday.The bank traded 900 shares to close at $1.27.The bank also saw 34 shares change hands as it rose 0.06 percent ($1) to $1,231.Overall the Index fell 14.22 points (1.27 percent) to 1,107.57 with 900 shares worth BD$1,143 and 34 shares worth US$42,262 transacted.The BSX Insurance Index, however, rose four points (0.39 percent) to 1,020.