Revision to ASPI calculation method to be implemented from January 24

The Colombo Stock Exchange (CSE) is revising the index calculation methodology of the All Share Price Index (ASPI) from full market capitalisation-weighting to free float-adjusted market capitalisation weighting as notified to the market on November 16, 2021. 

The Index methodology has been published on the CSE website.

The implementation of the said revision is scheduled to take place from 24th January 2022, with effect from the market closure of 21st January 2022.