The Colombo Stock Exchange closed lower on Thursday, with the broader All Share Index falling by 0.52 percent, or 62.03 points, to 11,768. The more liquid S&P SL20 Index declined by 0.51 percent, or 17.48 points, to 3,439. Turnover reached 1.1 billion rupees, with significant contributions from John Keells Holdings Plc, which saw a turnover