Mumbai, Aug 31 (IANS): After volatile trading on the day of derivatives expiry on Thursday, the key Indian equity indices provisionally closed in the green supported by late session buying in consumer durables, automobile and oil and gas stocks.

The wider 51-scrip Nifty of the National Stock Exchange (NSE) closed above the psychologically important 9,900-mark at 9,917.90 points -- up 33.50 points or 0.34 per cent from its previous session's close.

The 30-scrip Sensitive Index (Sensex) of the BSE, which opened at 31,685.44 points, provisionally closed at 31,730.49 points -- up 84.03 points or 0.27 per cent from its previous close at 31,646.46 points.

The Sensex touched a high of 31,757.18 points and a low of 31,551.85 points during the intra-day trade.

The BSE market breadth was bullish with 1,510 advances and 1,062 declines.

On Wednesday, the benchmark indices surged on the back of positive global cues and healthy buying in metal, oil and gas, and banking stocks.

The Nifty50 closed at 9,884.40 points -- up 88.35 points or 0.90 per cent -- while the Sensex closed at 31,646.46 points -- up 258.07 points or 0.82 per cent.