The Bermuda Stock Exchange finished the week up 3.87, or 0.33 percent, at 1,144.85.Butterfield closed at $1.37 as 78,190 shares changed hands.Bermuda National closed at $12 as 6,000 shares traded.Argus Group was also unchanged at $3.60 for the week as 1,803 shares traded.BF&M rose 4.5 percent to close at $17.05 as 4,615 shares traded.Bermuda Aviation Services fell 15 percent to close at $3.40 as 4,800 shares traded.KeyTech rose 1.9 percent, or 11 cents, to $6.01, as 17,956 shares traded.