Argus Group Holdings Ltd dropped 3.11 percent (14 cents) on The Bermuda Stock Exchange (BSX) yesterday.The insurer traded 2,900 shares to close at $4.36.KeyTech Ltd also fell 1.78 percent (10 cents) to $5.50 as 200 shares changed hands.The Ascendant Group Ltd (2,000 shares), BF&M Ltd (1,300) and Butterfield Bank (900) all transacted shares, but their share prices held firm.Overall the Index slipped 3.76 points (0.34 percent) to 1,098.58 with 7,300 shares worth BD$60,869 and 4,449 shares worth US$34,479.75 traded.The BSX Insurance Index, meanwhile, rose 10 points (1.01 percent) to 998.