Shares of Watlington Waterworks jumped 3.9 percent ($0.55) on the Bermuda Stock Exchange yesterday. 5,000 shares traded to close the day at $14.50 a share.KeyTech shares also ended the day up — gaining 4.2 percent ($0.25) to close at $6.25.Bank of Butterfield and Ascendant Group shares also traded but ended the day unchanged.Overall, the BSX gained 3.59 points (0.34 percent) to close the day at 1,063.18.