Butterfield Bank shares finished the week unchanged at $1.15 as some 28,500 changed hands on the Bermuda Stock Exchange (BSX) yesterday.BF&M Ltd shares ended the week up 25 cents, or 1.6 percent at $15.50 on a total volume of 15,300.Utilities also traded with Ascendant Group ending the week at $13.20, down 3.5 percent, or 48 cents on a volume of 600 shares.KeyTech Ltd finished at $5.25, down 1 percent on a volume of 1,600 shares.And Watlington Waterworks fell $1 or 8.3 percent at $11.Overall, the BSX closed down 2.76 percent, 28.14, at1,016.37 for the week.