The Bermuda Stock Exchange finished the week up 4.6 percent, or 49.24, at 1,076.06 as Butterfield Bank, Bermuda Press and KeyTech made big gains.Butterfield shares rose 7.1 percent, or 8 cents, to finish last week at $1.21, on a total volume of 80,807 shares.Bermuda Press shares rose 8.1 percent, or 75 cents, to close at $10 on a volume of 6,400.KeyTech shares rose 13.8 percent, or 75 cents, to close at $6.20 on a volume of 11,600.Argus Group also rose, gaining 2.6 percent, or 10 cents, to finish at $4 on a volume of 82,700 shares.Bermuda Aviation Services was the week’s only decliner, falling 5 percent to end at $2.85 on a volume of 500.