Shares of One Communications Ltd gained 6.7 per cent in Bermuda Stock Exchange trading.The telecommunications group gained 25 cents to close at $4, a 52-week high, on the trading of 12,000 shares.One was the only stock to trade as The Royal Gazette/BSX Index gained 3.4 points, or 0.22 per cent to close on 1,559.01. For the week, the index fell 240.34 points, or 15.41 per cent, mainly due to a 20.8 per cent fall in shares of Butterfield Bank over the five trading days. The BSX Insurance Index climbed 4.13 points, or 0.37 per cent, to close on 1,129.1.Butterfield Bank’s US-listed shares plunged $2.06, or 12.05 per cent, to close at $15.03 on the New York Stock Exchange. The bank last traded at $19 on the BSX.