The BSE Sensex was down 859.32 points, or 7.59%, to 10473.34. The barometer index Sensex is down 9813.65 points or 48.37% in the calendar year 2008 so far from its close of 20,286.99 on 31 December 2007. It is 10733.43 points or 50.61% below its all-time high of 21,206.77 struck on 10 January 2008.