The index closed at 911.24, its lowest level since daily trading started four years ago. Bermuda Commercial Bank set a 52 week low closing at $3.75 and Bank of Butterfield equaled a 52 week low at $9. Both fell 50 cents. Bank of Bermuda was up 12.5 cents at $17. In other trading, Bermuda Home, TeleBermuda, BAS and Telco were unchanged.