historic low. The index was down 2.82 points closing at 933.08, its lowest level since daily trading began. The low breaks the previous mark of 933.57 set October 3. In trading, one issue fell, one gained and one traded unchanged on the Bermuda Stock Exchange yesterday. Bank of Butterfield declined 12.5 cents closing at $9.25 on volume of 18,354. BF&M advanced 25 cents closing at $8.75 on volume of 250. Argus was unchanged at $11.75.