Shares of India Cements jumped 7 per cent after data showed ace investor Radhakishan Damani bought 16 lakh shares of the cement maker at Rs 94.97 per share. The investor and his family have been steadily increasing stake in the company. India Cements said that Gopikishan Damani, Radhakishan Damani, Shrikantadevi Damani and Derive Investments picked up 1.2 crore shares or 4 per cent stake through open market purchases between February 27 and March 16, raising stake to 16 per cent from 11.98 per cent.