KeyTech fell four percent for the week on the Bermuda Stock Exchange, finishing at $5.75, as 12,000 shares traded hands.Ascendant Group also declined, falling 10 cents to close at $12 on Friday as 8,110 shares changed hands.Butterfield Bank ended the week down 0.80 percent, or once cent to close at $1.23 as 134,840 shares traded.Overall the BSX ended the week down 8.71, or 0.8 percent, at 1,066.87.