The Bermuda Stock Exchange ended the week down 13.04, or 1.14 percent, at 1,140.98KeyTech ended the week up 1.7 percent to $5.90 as 1,600 shares changed hands.Some 3,320 BF&M shares changed hands, ending the week higher 0.1 percent to $16.31.Butterfield Bank ended the week lower 2.1 percent to $1.37 as 107,342 shares changed hands.Argus Group finished the week lower 0.3 percent at $3.60 as 2,000 shares changed hands.Bermuda National Ltd was unchanged at $12 as 2,705 shares changed hands.