Shares of Butterfield bank improved by $1.03, or 2.9 per cent, to $36 after 6,100 traded on The Royal Gazette/BSX Index.On the New York Stock Exchange, the bank’s shares were up 75 cents, or 2.09 per cent, at $36.58The Royal Gazette/BSX Index was up 46.32 points, or 2.02 per cent, at 2,340.73, while the BSX Insurance Index was up 20.87 points, or 1.23 per cent, to 1,716.68.