Argus Group Holdings soared 15.7 percent in Bermuda Stock Exchange trading yesterday.The insurer climbed 65 cents to $4.80 as 10,000 shares traded.Argus was the only domestic-board issue to trade yesterday.The Royal Gazette/BSX Index rose 11.83 points, or 1.05 percent, to close the day on 1,135.53.BSX volume was 10,000 shares and turnover was $48,000.The BSX Insurance Index of the Island’s leading international insurance companies had a very positive day, climbing 19 points, or 1.92 percent, to close on 1,008.