Butterfield Bank traded 8,739 shares on The Bermuda Stock Exchange (BSX) yesterday.But the bank's share price remained unchanged at $1.30.The Index, as a whole, held firm at 1,172.94, with 8,739 shares worth BD$10,520.20 and 1,000 shares worth US$10,150 changing hands.The BSX Insurance Index was up 0.39 percent at 1,017.