The Bermuda Stock Exchange Index traded 1,666 shares worth $14,135.80 yesterday.The Index remained unchanged at 1,170.29.Among the big traders were Butterfield Bank, which saw 266 shares worth $1.30 each change hands, while Bermuda Commercial Bank Ltd. transacted 1,400 shares worth $9.85 each.The BSX Insurance Index also endured a quiet day, opening and closing at 1,026.