Butterfield shares ended the week at $1.45 on the Bermuda Stock Exchange last week.Some 215,716 of the bank’s shares changed hands, finishing the week down five cents or 3.3 percent.Argus shares closed down 0.3 percent at $3.50 as a total of 300 shares changed hands.Ascendant also ended the week lower at $11.55, a drop of 15 cents, or 1.3 percent.Bermuda Aviation Services ended the week higher at $4, rising 14.3 percent, as 800 shares changed hands.Overall the BSX ended the week down at 1,173.85, losing 22.93, or 1.95 percent.