The Colombo Stock Exchange (CSE) announces the rebalancing of the All Share Price Index (ASPI) for the 2^nd Quarter of 2026. The announced rebalancing will be effective from the market opening of 22^nd  June 2026 (after the market close of 19^th June 2026).

What is Quarterly Rebalancing?

The ASPI was originally calculated based on full market capitalization. In January 2022, the methodology was revised to adopt a float-adjusted market capitalization basis, whereby only the public holding portion of a company's market capitalization is considered in the index calculation. As listed companies report their public holding percentages on a quarterly basis, the ASPI requires periodic adjustments to reflect these changes. These adjustments are carried out through the quarterly rebalancing process of the ASPI. Accordingly, the next quarterly rebalancing exercise for the ASPI (2026 Q3) is scheduled to take effect after market on 18^th September 2026.