Shares of Argus Group Holdings Ltd rocketed 23 per cent in heavy Bermuda Stock Exchange trading.The insurer gained 59 cents to close on $3.15 as 163,678 shares changed hands.The only other stock to trade was One Communications Ltd, which remained unchanged on $3.75 as 12,000 shares traded.The US-listed shares of Butterfield Bank bounced back strongly, gaining $2.64, or 13.89 per cent, to close on $21.65 on the New York Stock Exchange. The bank’s shares last traded at $24 on the BSX.The Royal Gazette/BSX Index gained 11.79 points, or 0.66 per cent, to close on 1,799.35.Trading volume totalled 175,678 shares and turnover was $556,559.The BSX Insurance Index gained 37.68 points, or 2.85 per cent, to close on 1,357.69, amid a rally on Wall Street after its worst day since 1987 on Thursday.