Butterfield Bank dropped four cents (3.14 percent) on the Bermuda Stock Exchange yesterday, trading 10,700 shares to close at $1.23.Ascendant Group jumped 28 cents (2.20 percent), rebounding after Monday’s drop, trading 1,900 shares to close at $13.KeyTech also traded 900 shares to close at $6 with no change in share price.Overall, the BSX closed at 1,080.08, down 16.52 points (1.51 percent), trading 13,500 shares worth $43,669.75