The Bombay Stock Exchange benchmark Sensex opened lower by 182 points on Friday on heavy selling by funds ahead of the Reserve Bank's monetary policy review amid weakening global trend.

The 30-share index dropped by 182.03 points to 16,124.84 points in the first five minutes of trading. The BSE barometer had closed up by 17 points yesterday. The National Stock Exchange index Nifty fell by 53.60 points to 4,813.65 points.