Bermuda Aviation slid 10 cents (3.22 percent) on the Bermuda Stock Exchange yesterday with 4,400 shares trading to close at $3. Butterfield Bank and Butterfield Preferred traded 2,750 and 49 shares, respectively, with no change in share price.Overall, the BSX closed at 1,108.13, down .43 points (. 04 percent) with 7,150 shares trading worth $16,225 and 49 US shares trading worth US$61,462.33.