Keytech Ltd. dropped 9.14 percent (64 cents) on The Bermuda Stock Exchange (BSX) last week.The utilities company traded 2,400 shares to close at $6.36.Butterfield Bank also fell 3.84 percent (five cents) to $1.25, with 1,600 shares changing hands.But the Ascendant Group Ltd. climbed 1.35 percent (20 cents) to $14.95, as 2,100 shares were transacted.Other traders included Argus Group Holdings Ltd. (2,000 shares), Stevedoring Services Ltd. (2,000) and BF&M Ltd. (400), but all of their share price held firm.Overall the Index was down 30.17 points (2.64 percent) at 142.49, with 10,700 shares worth BD$74,729 and 2,950 shares worth US$28,467.50 changing hands.The BSX Insurance Index was up three points (0.29 percent) at 1,027.