Meanwhile, the S&P BSE Sensex was up 315.81 points or 1.11% at 28,754.72.

On BSE, so far 1,650 shares were traded in the counter as against average daily volume of 27,594 shares in the past one quarter.

The stock opened with a downward gap falling by the maximum permissible level of 5% and remained locked at 5% level at Rs 43.15 so far in the day. The stock had hit a 52-week low of Rs 20.95 on 28 January 2014. The stock had hit a 52-week high of Rs 53.15 on 14 October 2014.

Shares of Wanbury have slumped 9.63% in two trading sessions from Rs 47.75 on 47.75 on 26 November 2014, after the company after market hours on Wednesday, 26 November 2014 reported weak results for the quarter ended 30 September 2014. The stock had declined by the maximum permissible level of 5% to settle at Rs 45.40 on Thursday, 27 November 2014.

Wanbury reported a net loss of Rs 261.48 crore in the quarter ended 30 September 2014, higher than net loss of Rs 2.59 crore in the quarter ended 30 September 2013. Net sales rose 10.6% to Rs 121.90 crore in the quarter ended 30 September 2014 over the quarter ended 30 September 2013.

Wanbury is a pharmaceutical firm. It has a strong presence in API global market and domestic branded formulation.