Heavy trading in Butterfield Bank common and preference shares and a four percent slide in Ascendant Group Ltd’s stock price were the highlights of a week which ended with the Bermuda Stock Exchange (BSX) almost flat.The Royal Gazette/ BSX Index ended Friday on 1,066.95, down 0.97 of a point, or 0.09 percent over the five days of trading.More than 872,000 Butterfield Banks shares changed hands as the stock rose one cent, or 0.8 percent, to close the week on $1.25. Meanwhile, 2,703 of the bank’s preference shares were traded as the price rose $1 to $1,216.The biggest mover of the week was Belco’s parent company Ascendant, which shed 48 cents, or four percent, on the trading of 200 shares to close on $11.51, just a cent above its 52-week trading low.Insurer BF&M Ltd also slid by 24 cents, or 1.5 percent, to close on $15.76 as 1,400 shares changed hands.KeyTech Ltd edged higher, gaining one cent, 0.17 percent, as 1,300 shares were traded.Share volume for the week topped 890,000 and turnover exceeded $4.45 million.