Some 261,796 Butterfield shares traded.Bermuda National closed unchanged at $12 on a volume of 4,800.BF&M slipped 4.39 percent, or 75 cents, to end at $16.30, on a volume of 8,100.KeyTech rose 1.61 percent to $6.30 on a volume of 1,700.Overall the BSX closed down 13.37, or 1.14 percent, at 1,158.93