The Bermuda Stock Exchange ended the week down 0.48 percent, or 5.54, at 1,151.00.Some 56,550 Butterfield shares traded, the bank’s shares ending Friday at $1.40.Ascendant Group shares declined 5.9 percent, closing the week at $11.01 as 6,600 changed hands.Watlington Waterworks shares rose 50 cents, or 3.3 percent to $15.50, as 5,500 traded.