The Sensex was trading 270 points up at 21,029 points, a shortwhile ago. It regained 21,000-level by surging 264 points in early trade today on increased buying by funds and retailers despite weak IIP data. The industrial production data for November, which was released after the market hours on Friday, contracted to a six-month low of 2.1 per cent.Similarly, the wide-based National Stock Exchange indexNifty was also trading 72 points up at 6,244 points, a shortwhile ago.