Butterfield Bank slid 10 cents (8.00 percent) on the Bermuda Stock Exchange yesterday to close at $1.15 with 17,562 shares trading. KeyTech also fell 50 cents (6.33 percent) to close at $5.50 with 8,000 shares trading and Argus dropped one cent (.24 percent) to close at $4.15 with 19,900 shares trading. BF&M closed at $15.25 with 4,000 shares trading, Ascendant Group closed at $13.08 with 3,200 shares trading and Butterfield Bank Preferred closed at $1230 with 90 shares trading, all three had no change in share price.Overall, the BSX closed at 1,044.51, down 52.26 points (5.00 percent) with 52,662 shares trading worth BD$249,848.15 and 3,520 US shares trading worth US$141,252.