Both the key indices plummeted by almost one per cent each. All the 19 sub-indices of the BSE were trading in the red. The wider 51-scrip Nifty of the National Stock Exchange (NSE) edged down 58.90 points, or 0.67 per cent, to 8,686.25 points.

The barometer 30-scrip sensitive index (Sensex) of the BSE, which opened at 28,423.14 points, traded at 27,995.61 points (at 12.30 p.m.) -- down 297.20 points or 1.05 per cent from the previous close at 28,292.81 points.

The Sensex has so far touched a high of 28,475.57 points and a low of 27,995.20 points during the intra-day trade.

The BSE market breadth fell prey to the bears -- with 1,524 declines and 915 advances.