Shares of Argus Group Holdings Ltd gained 2.7 per cent in Bermuda Stock Exchange trading.The insurer gained six cents to close on $2.25 as 23,000 shares changed hands.The most heavily traded stock was One Communications Ltd, which remained unchanged on $4, as 69,100 shares were traded.The Royal Gazette/BSX Index edged 1.2 points, or 0.08 per cent higher, to close on 1,501.75. Trading volume totalled 92,100 shares and turnover was $327,670.Butterfield Bank US-listed shares surged $1.31 or 8.2 per cent, to close on $17.27 on the New York Stock Exchange. The bank last traded on the BSX at $18.The BSX Insurance Index gained 83.99 points, or 7.25 per cent, to close on 1,242.43.