The Bermuda Stock Exchange closed down slightly, 0.03 percent, or 0.40, to finish the week at 1,089.89Ascendant group fell 1.6 percent, or 20 cents, to end the week at $12.52.Some 8,634 of the company’s shares changed hands.Argus Group closed Friday at $3.80, down 1.3 percent, or 5 cents, as 535 shares changed hands.BF&M also traded, but finished the week the same at $15.85 as 22,789 shares traded.Some 8,100 Butterfield shares changed hands, ending unchanged at $1.25.