Indonesian shares are higher Wednesday led by buying in cement maker Semen Gresik on news that the government will buy back Mexican company Cemexa’s 25.53% stake in Gresik, dealers said. Overall sentiment, however, remains cautious due to the ongoing security concerns ahead of the presidential runoff in September, they added. Cement maker Semen Gresik is leading the gainers, up IDR300, or 3.9%, atIDR9,300.