Direct Answer
The FTSE ST All-Share Index is a rule-based measurement of broad Singapore equity benchmark, maintained by FTSE Russell/SGX. Like every index it owns nothing: it is a number produced by applying a published weighting formula to a selected list of companies, revised on a schedule the provider sets.
What this index covers
The FTSE ST All-Share Index covers broad Singapore equity benchmark, within the Singapore market. FTSE Russell/SGX defines which securities are eligible, how they are selected from that pool, and how much each one contributes to the published number.
The index name does not state a fixed company count, so the number of constituents follows the eligibility rules rather than a target.
How constituents are weighted
Free float adjusted market capitalisation weighting, using investability weights between 0 and 1 published by FTSE Russell. Foreign ownership restrictions are not applied, and the index is calculated in Singapore dollars. Capped variants can be produced under a separate FTSE Russell capping guide.
The weighting method is the single biggest driver of how an index behaves. Two indexes covering the same market can diverge for years purely because they weight differently, which is why comparing index levels without knowing the method tells you very little.
What qualifies for inclusion
Ordinary shares and depository receipts of SGX Mainboard companies that fall inside the top 98% of the Singapore universe by cumulative full market capitalisation. Free float must exceed 15%, developed market companies need more than 5% of voting rights in unrestricted hands, and investment trusts are excluded. Catalist companies sit in a separate index.
Eligibility rules are the part of an index most readers never look at and the part that decides what it can possibly measure. A screen that excludes a whole sector, or admits only one listing venue, shapes the result far more than any day of trading does.
How long a listing must exist first
Each security is tested for liquidity every March and September: non-constituents need 0.05% monthly median turnover in 10 of 12 months, existing constituents 0.04% in 8 of 12. New issues need at least 20 trading days of record. A large IPO can enter after its fifth trading day, otherwise it waits for the next review.
A seasoning rule is why a large new listing does not appear in an index the week it starts trading. It is a deliberate lag, and it means an index can under-represent a fast-growing part of the market for months at a time.
When the membership is revised
Semi-annual reviews take place in March and September, with a quarterly review of selected indices, including this one, in June and December. Data come from the close on the Monday four weeks before the effective date, and changes take effect after the close on the third Friday of the review month.
Reconstitution is the one date an index changes shape by design rather than by price. Funds tracking it have to trade toward the new membership, which is why the schedule matters to anyone holding the tracker rather than only to the provider.
The rule that surprises people
Membership uses a buffer. A company enters inside the top 98% of the index universe, but an existing Small Cap member is only moved to the Fledgling Index once it ranks below 101% of that universe, which the document says is roughly 99% of the country universe.
References
- FTSE Russell/SGX: FTSE Russell FTSE ST Index Series Ground Rules, as published 2026. Every rule described on this page is taken from this document.
Current FTSE ST All-Share Index constituents
FTSE Russell/SGX publishes and licenses the FTSE ST All-Share Index constituent list. Swoopr does not republish it here. The provider's own page is the authoritative source for current membership and weights.
Related reading
- All stock market indexes: how indexes are built, weighted and revised.
- Asia-Pacific indexes: others covering the same region.
- Index concentration: measuring how much of an index sits in its largest holdings.
- Index rebalancing and inclusion effects: what happens to a stock when index membership changes.
Frequently Asked Questions
Who maintains the FTSE ST All-Share Index?
FTSE Russell/SGX maintains the FTSE ST All-Share Index and publishes the methodology document that defines its eligibility and weighting rules.
What does the FTSE ST All-Share Index measure?
It measures broad Singapore equity benchmark. The index is a calculated number applying a weighting formula to a selected list of companies, and it holds nothing itself.
Where can I see the current FTSE ST All-Share Index constituents?
FTSE Russell/SGX publishes the current constituent list. Swoopr does not republish it, because index providers license constituent data and Swoopr holds no such licence.