Argus Group rose the most last week on the Bermuda Stock Exchange, ending nearly 8 percent higher at $3.40 on a volume of 18,143.BF&M closed Friday at $16.00, up 24 cents, or 1.5 percent, as 305 shares changed hands.Butterfield Bank shares ended the week at $1.26, a cent higher, as 681,046 shares were traded.Overall the BSX closed up 1.10 percent at 1,078.91.