Butterfield Bank shares traded yesterday on the Bermuda Stock Exchange (BSX).They closed down 4 cents, or 2.7 percent, at $1.45.Ten-thousand of the Bank’s shares changed hands.Overall the BSX closed down 1.5 percent, or 19.14 to finish the day at 1,215.73.The Bermuda Insurance Index closed up 0.67 percent, or 6, at 906.