Argus Group Holdings Ltd. dropped 9.78 percent (45 cents) to $4.15 on The Bermuda Stock Exchange (BSX) yesterday.The insurer traded 500 shares to close at $4.15.But fellow insurance company BF&M Ltd. rose 0.47 percent (seven cents) to $14.80 as 3,200 shares changed hands.The Index, as a whole, slipped 7.71 points (0.67 percent) to 1,134.52 with 3,700 shares worth $49,435 transacted.