KeyTech jumped 44 cents (7.91 percent) on the Bermuda Stock Exchange yesterday, trading 300 shares to close at $6.Bermuda Commercial Bank also jumped 50 cents (4.54 percent), trading 494 shares to close at $11.50.Butterfield Bank traded 70,856 shares to close at $1.23 with no change in share price.Overall, the BSX closed at 1,069.01, up 8.45 points (.80 percent), trading 71,650 shares worth $94,635.88.