Watlington Waterworks Ltd. slipped 13 percent ($1.5)) on The Bermuda Stock Exchange Index (BSX) yesterday.The utilities company traded 2,000 shares to close at $10 for the day.Elsewhere Butterfield Bank also fell 3.7 percent (five cents) to $1.30, as 600 shares changed hands.Argus Group Holdings Ltd. also transacted 23 shares, but its share price held firm at $5.55.Overall the Index dropped 25.27 (2.11 percent) to 1,172.94, with 2,623 shares worth $20,918 traded.The BSX Insurance Index aldo declined two points (0.2 percent) to 1,013.