KeyTech jumped 25 cents (4.76 percent) on the Bermuda Stock Exchange yesterday, trading 5,000 shares to close at $5.50.Butterfield Bank slid six cents (5.17 percent) to close at $1.10, trading 37,400 shares.Bermuda Commercial Bank traded 211 shares to close at $11 with no change in share price.Overall, the BSX closed at 1,018.56, sliding 25.34 (2.43 percent) with 42,611 shares trading worth $71,450.