KeyTech Ltd shares climbed 20 cents, or 3.6 percent, to $5.75 as 4,510 shares changed hands on the Bermuda Stock Exchange last week.Argus Group Holdings Ltd shed 74 cents, or 17.2 percent, to $3.56 as 9,300 shares changed hands.Ascendant Group Limited lost 20 cents, or 1.8 percent, to $11 as 2,000 shares changed hands.Bank of NT Butterfield was unchanged at $1.39 as 257,220 shares changed hands.Overall, the BSX Index lost 12.56, or 1.08 percent, to 1,157.53 on a share volume of 273,030.