The Colombo Bourse ended the shortened four-day trading week in positive territory, closing just above the 15,800 level, as investor sentiment gradually rebounded despite a slight midweek decline. The benchmark ASPI gained 109.70 points (+0.70%) while the more liquid S&P SL20 index was up marginally by 5.78 points (+0.12%) to close at 15,851.74 and 4,638.29 respectively.