Butterfield Bank shares ended the week unchanged at $1.40 as 103,547 shares changed hands on the Bermuda Stock Exchange.Also unchanged was Watlington Waterworks at $15 as 3,100 shares changed hands.Argus Group was unchanged at $3.60 as 600 shares changed hands.Ascendant Group was unchanged at $11.70 as 215 shares changed hands.Bermuda National Ltd was unchanged at $12 as 200 shares changed hands.Overall the BSX ended up 0.72, or 0.06 percent, at 1,156.54.