Shares of Argus Group Holdings Ltd fell 1.7 per cent in Bermuda Stock Exchange trading.The insurer fell four cents to close on $2.31 as 10,000 shares changed hands.One Communications Ltd was the only other stock to trade. The telecommunications group remained unchanged on $3.80 as 25,000 shares were traded.The US-listed shares of Butterfield Bank gained 88 cents, or 3.75 per cent, to close on $24.32, as 148,662 shares were traded. Butterfield last traded at $25.25 on the BSX.The Royal Gazette/BSX Index fell 0.8 of a point, or 0.04 per cent, to close on 1,838.41.The BSX Insurance Index fell 47.91 points, or 3.41 per cent, to close on 1,358.03.