Butterfield Bank rebounded 7 cents (7.07 percent) on the Bermuda Stock Exchange yesterday, with 6,843 shares trading to close at $1.06. Butterfield Preferred dropped $5 (. 40 percent) with 20 shares trading to close at $1,225.Overall, the BSX closed at 999.06, up 33.17 points (3.43 percent) with 6,943 shares trading worth BD$8,508.29 and 20 US shares trading worth US$24,606.67.