Butterfield Preference shares fell $6.01 to $1,234.00 as 160 traded last week on the Bermuda Stock Exchange.Butterfield regular shares ended unchanged at $1.40 as a total of 91,289 changed hands.Argus rose one cent to $3.56, while Ascendant Group finished the week up 20 cents at $11.70. KeyTech also rose, 20 cents, to $6 as 1,600 shares were traded.And Watlington Waterworks rose 50 cents, to finish the week at $15.Overall the BSX ended up 4.83, or 0.41 percent, at 1,155.82.