The Bermuda Stock Exchange ended the week up 5.38, or 0.47 percent, at 1,212.79.Some 202,199 Butterfield Bank shares traded, ending the week unchanged at $1.35.Argus Group shares rose 25 cents, or nearly 8 percent, ending Friday at $3.40 on a volume of 2,000.Some 39,000 BF&M shares traded, closing unchanged at $16.Ascendant Group rose 10 cents to finish Friday at $11.65. KeyTech and Watlington Waterworks also traded, ending unchanged at $5.80, and $14.50 respectively.