Direct Answer
The STOXX Asia/Pacific 600 is a rule-based measurement of 600 large-, mid-, and small-cap companies across Asia-Pacific markets, maintained by STOXX/Qontigo. 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 STOXX Asia/Pacific 600 covers 600 large-, mid-, and small-cap companies across Asia-Pacific markets, within the Asia-Pacific market. STOXX/Qontigo 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 market capitalization weighted with a fixed 600 components. A 20% cap applies to each component at the quarterly reviews.
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
Covers the largest developed market stocks of the STOXX Asia/Pacific Total Market Index. One stock per company is considered (the most liquid) with a minimum 3 month average daily trading value above one million euros. The largest 550 stocks qualify directly and the remaining 50 are current members ranked 551 to 750, then the largest remaining stocks.
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.
When the membership is revised
Reviewed quarterly in March, June, September and December, with the cut off on the last trading day of the month before the review month. The selection list is refreshed monthly and a deleted stock is replaced by the highest ranked non component; there is no fast entry.
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
It is one of three regional building blocks of the STOXX Global 1800 and is limited to developed markets, so it does not include emerging Asian markets, and an existing member survives down to rank 750.
References
- STOXX/Qontigo: STOXX, STOXX Index Methodology Guide (Portfolio Based Indices), September 2026 edition, as published 2026. Every rule described on this page is taken from this document.
Current STOXX Asia/Pacific 600 constituents
STOXX/Qontigo publishes and licenses the STOXX Asia/Pacific 600 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.
- Global 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 STOXX Asia/Pacific 600?
STOXX/Qontigo maintains the STOXX Asia/Pacific 600 and publishes the methodology document that defines its eligibility and weighting rules.
What does the STOXX Asia/Pacific 600 measure?
It measures 600 large-, mid-, and small-cap companies across Asia-Pacific markets. 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 STOXX Asia/Pacific 600 constituents?
STOXX/Qontigo publishes the current constituent list. Swoopr does not republish it, because index providers license constituent data and Swoopr holds no such licence.