THE 30 stocks making up the closely watched Straits Times Index (STI) will remain unchanged following the latest quarterly review by Singapore Press Holdings (SPH), the Singapore Exchange (SGX) and the FTSE Group.

This review also names a reserve list - the five largest companies that meet the index criteria including liquidity requirements and are still not in the STI.

These firms will replace any STI constituents that become ineligible as a result of corporate actions before the next review.

The STI reserve list will be - in order of size - Ascendas Real Estate Investment Trust, Keppel Land, UOL Group, Yangzijiang Shipbuilding Holdings and CapitaCommercial Trust.

Several changes were made to other indices in the FTSE ST Index Series.

For example, Rowsley, OUE Hospitality Trust and Asian Pay Television Trust were added to the FTSE ST Mid Cap Index.

They replaced Mandarin Oriental International, Fortune Real Estate Investment Trust and Hotel Properties which were removed from the Mid Cap Index.

All changes from this review will take effect from the start of trading on March 24. The next review is scheduled for June 5.