Bermuda Aviation Services Ltd dropped 5.55 percent (20 cents) on The Bermuda Stock Exchange (BSX) yesterday.The transport company traded 25,600 shares to close at $3.40.BF&M Ltd also declined 1.33 percent (20 cents) to $14.80 as 822 shares changed hands.Other traders included the Ascendant Group Ltd (1,276 shares), Bermuda Press (Holdings) Ltd (34) and KeyTech Ltd (15), but all of their share prices held firm.Overall the Index slipped 2.27 points (0.18 percent) to 1,285.08 with 27,747 shares worth $118,488.60 transacted.The BSX Insurance Index also fell eight points (0.87 percent) to 913.