Butterfield Bank rose 1.6 percent, or 2 cents to $1.25 on the Bermuda Stock Exchange last week as 211,687 shares changed hands.Bermuda National fell $2 or 16 percent to $10 as 300 shares changed hands.Argus Group shares fell 7.4 percent, or 25 cents to close at $3.15 as 800 shares changed handsBF&M shares closed unchanged at $16.In utilities, Ascendant Group fell 5 cents $11.50 on a volume of 4,623 and KeyTech rose 25 cents to close at $6 as 7,300 shares traded hands.Over the BSX closed down 4.37 or 0.4 percent at 1,059.60.