Bermuda Aviation Services dropped 11.42 percent on the Bermuda Stock Exchange (BSX) yesterday.The company’s shares fell 40 cents, to close at $3.10 on a volume of 600.Ascendant Group shares also traded, closing unchanged at $13.26 on a volume of 430.Overall the Index closed down 3.65 percent, or 38.63 at 1,058.15.