Butterfield Bank was the only issuer to trade on the Bermuda Stock Exchange (BSX) yesterday.The bank’s common shares remained unchanged on $1.23 as 8,749 shares changed hands.Two of Butterfield’s eight-percent-yielding preference shares were also traded and the price remained at $1,230.The Royal Gazette / BSX Index closed unchanged at 1,075.38. Volume topped 10,700 shares, while turnover exceeded $32,000.