Butterfield Bank fell below a $1 on the Bermuda Stock Exchange yesterday.The Bank’s shares hit 99 cents, falling 1 percent, or one cents, on a volume of 58,600.Overall the BSX closed down 0.49 percent, or 4.74, to finish the day at 965.89.The BSX Insurance Index ended the day down 7.000, or 0.66 percent, at 1052.00