Argus rose 12.4 percent last week to close at $4 on a volume of 22,000.Butterfield shares closed at $1.40, up a cent for the week as 42,778 shares traded.KeyTech fell 10 cents to end the week at $5.65 as 13,690 shares traded.Ascendant fell 50 cents to close at $10.50 on a volume of 6,270.Overall the BSX ended the week at 1,161.83, up 4.31 or 0.37 percent.