Top stocks that witnessed heavy demand in pre-opening session

At the pre-opening bell, the frontline index S&P BSE Sensex opened in red with a loss of 123.32 points or 0.16%. Sector-wise, in the pre-opening session, metals jumped by 0.05%, power zoomed by 0.06%, and auto slipped by 0.27%. Meanwhile, NIIT Learning Systems, TVS Holdings and Vinati Organics emerged as the top gainers of BSE in the pre-opening session today.