--- title: "FTSE ADX 15 Index: Methodology" description: "FTSE ADX 15 Index is maintained by FTSE Russell/ADX and covers top 15 companies listed on the Abu Dhabi Securities Exchange by market capitalisation." canonical: https://www.getswoopr.com/stocks/indexes/ftse-adx-15/ source: "Swoopr Investment: https://www.getswoopr.com" --- # FTSE ADX 15 Index: What It Measures and How It Is Built ## Direct Answer > The FTSE ADX 15 Index is a rule-based measurement of top 15 companies listed on the Abu Dhabi Securities Exchange by market capitalisation, maintained by FTSE Russell/ADX. 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 ADX 15 Index covers top 15 companies listed on the Abu Dhabi Securities Exchange by market capitalisation, within the UAE market. FTSE Russell/ADX defines which securities are eligible, how they are selected from that pool, and how much each one contributes to the published number. The name states a target of 15 companies. A target is not a guarantee of the exact count on any given day: corporate actions, dual share classes and pending additions all move the real number around it. ## How constituents are weighted Free float adjusted with no foreign ownership limits. Weights are capped each quarter, in March, June, September and December, so the largest company stays at or below 33% and every other company at or below 18%. 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 Drawn from the FTSE ADX General Index and limited to ordinary shares on the Abu Dhabi Securities Exchange Main Market. Shares ranked 31st or lower by free float market capitalisation are dropped, and the rest are ranked by 20 day median traded value. Investment trusts and fund vehicles are not eligible. 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 New issues with fewer than 20 days of trading are left out of the review universe. A new listing worth 1% or more of the General Index can enter after its fifth trading day, and if that lifts the count to 16 the constituent with the lowest 20 day median traded value is removed. 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 Reviewed semi annually in March and September on market data from the second Friday of February and August. Changes take effect after the close of the third Friday of the review month. A security enters by rising to 11th place or above and leaves by falling to 19th or below. 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 The index can hold more than 15 securities after a review: when one company has more than one share line selected, an additional company is chosen so that 15 companies are kept. ## References - [FTSE Russell/ADX: FTSE Russell FTSE ADX Index Series Ground Rules v2.3](https://www.lseg.com/content/dam/ftse-russell/en_us/documents/ground-rules/ftse-adx-index-series-ground-rules.pdf), as published 2026. Every rule described on this page is taken from this document. ## Current FTSE ADX 15 Index constituents FTSE Russell/ADX publishes and licenses the FTSE ADX 15 Index constituent list. Swoopr does not republish it here. The provider's own page is the authoritative source for current membership and weights. [FTSE Russell/ADX: official FTSE ADX 15 Index page](https://www.adx.ae/english/Pages/marketinformation/indices.aspx) ## Related reading - [All stock market indexes](https://www.getswoopr.com/stocks/indexes/): how indexes are built, weighted and revised. - [Emerging Markets indexes](https://www.getswoopr.com/stocks/indexes/emerging-markets/): others covering the same region. - [Index concentration](https://www.getswoopr.com/technical-analysis/market-concentration/index-concentration/): measuring how much of an index sits in its largest holdings. - [Index rebalancing and inclusion effects](https://www.getswoopr.com/stocks/corporate-actions-catalysts/index-rebalancing-and-inclusion-effects/): what happens to a stock when index membership changes. ## Frequently Asked Questions ### Who maintains the FTSE ADX 15 Index? FTSE Russell/ADX maintains the FTSE ADX 15 Index and publishes the methodology document that defines its eligibility and weighting rules. ### What does the FTSE ADX 15 Index measure? It measures top 15 companies listed on the Abu Dhabi Securities Exchange by market capitalisation. 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 ADX 15 Index constituents? FTSE Russell/ADX publishes the current constituent list. Swoopr does not republish it, because index providers license constituent data and Swoopr holds no such licence. ## About the author The [Swoopr Editorial Team](https://www.getswoopr.com/authors/swoopr-editorial-team/) writes Swoopr Investment's educational library, covering market structure, analysis methods and the mechanics behind the numbers investors read every day. Our [editorial policy](https://www.getswoopr.com/legal/editorial-policy/) and [corrections policy](https://www.getswoopr.com/legal/corrections-policy/) set out how this content is produced, reviewed and fixed when it is wrong.