The Royal Gazette/BSX Index remained unchanged on 1,846.35 on a day when no shares were traded on the Bermuda Stock Exchange.Butterfield Bank’s US-listed shares fell 37 cents, or 1.38 per cent, to close on $26.42 on the New York Stock Exchange as 204,640 shares changed hands.Butterfield last traded at $25 on the BSX.The BSX Insurance Index fell 23.39 points, or 1.58 per cent, to close the day on 1,459.27.