Watlington Waterworks and Butterfield Bank were the biggest movers on The Bermuda Stock Exchange (BSX) last week.The former rose 2.56 percent (30 cents) to $12 with 875 shares traded, while the latter was up .25 percent (three cents) at $1.18 as 26,576 shares changed hands.Keytech Ltd also advanced 1.81 percent (10 cents) to $5.60 with 2,000 shares transacted.Other traders included Argus Group Holdings Ltd (12,900 shares) and BF&M Ltd (47), but both of their share prices held firm.Overall the Index increased 15.64 points (1.47 percent) to 1,060.29 with 52,750 shares worth BD$244,563.70 and 198 shares worth US$1,504.80 traded.The BSX Insurance Index was up two points (0.2 percent) to 1,000.