Bermuda Aviation Services Ltd rose 22.22 percent (90 cents) on The Bermuda Stock Exchange (BSX) yesterday.The transportation company traded 100 shares to close at $4.95.The only other trader was Butterfield Bank, which fell 3.07 percent (four cents) to $1.26 with 6,527 shares changing hands.Overall the Index dropped 15.22 points (1.34 percent) to 1,121.42 as 6,627 shares worth $8,725.10 were transacted.The BSX Insurance Index, however, was up two points (0.21 percent) at 976.