Butterfield Bank dropped one cent (.80 percent) on the Bermuda Stock Exchange yesterday, trading 17,066 shares to close at $1.23.Argus traded 900 shares, BF&M traded 200 and Bermuda Press (Holdings) traded 38 shares, all with no change in share price.Overall, the BSX closed at 1,065.71, down 4.74 points (.44 percent), trading 18,204 shares worth BD$27,593.18 and 10 US shares worth US$12,353.33