Shares of Argus Group Holdings Ltd improved four cents, or 1.8 per cent, to $2.29 after 45,000 traded on The Royal Gazette/BSX Index.There was also trading in 100,000 shares of One Communications Ltd, but with no change to the closing price of $4.In New York, shares of Butterfield Bank were up six cents, or 0.35 per cent, at $17.33.The Royal Gazette/BSX Index was up 0.8 of a point at 1,502.55, while the BSX Insurance Index was up 23.11, or 1.86 per cent, at 1,265.54.Meanwhile, BF&M said in a BSX filing that it bought back 27,800 of its own common shares at an average price of $17.72 during the month of March. The repurchased shares were reserved for issuance, the company said.