Equity benchmarks extended gains in morning trade as the 30-share BSE Sensex was up 127.20 points at 31,857.69.
The 50-share NSE Nifty reclaimed 9,950, up 37.40 points at 9,955.30.
About 1,325 shares advanced against 426 advancing shares on the BSE.
Aditya Birla Capital listed at Rs 237.50 on the National Stock Exchange, which was 5 percent lower compared with pre-opening price of Rs 250.
In fact, the stock is locked at 5 percent lower circuit amid heavy volumes.
Grasim Industries gained 1.6 percent while Aditya Birla Money fell nearly 4 percent.