Bermuda Aviation Services was yesterday flying high on the Bermuda Stock Exchange, finishing the day up 11.76 per cent.BAS stood at $3.80 a share, with 12,796 shares traded.Insurance firm BF&M stood at $17 per share, a 4.29 per cent increase ($0.70) with 11,000 shares traded.Butterfield Bank closed the day with 20,800 shares traded and standing at $1.39 a share.The Ascendant Group, which includes electricity supplier BELCO, stayed at $11.50 a share, with 200 shares traded on the day.Communications group KeyTech finished the day 0.49 percent up on a volume of 5,000 shares, standing at $6.15 per share.