Direct Answer
The NGX Banking Index is a rule-based measurement of banking sector companies listed on the Nigerian Exchange, maintained by Nigerian Exchange. 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 NGX Banking Index covers banking sector companies listed on the Nigerian Exchange, within the Nigeria market. Nigerian Exchange 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
NGX says its indices are designed using the market capitalisation methodology, so larger banks carry larger weights in the sector index.
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
The sectoral indices launched in 2008 each hold a fixed group of the most capitalised and liquid companies of their sector. For banking that group is the top ten most capitalised and liquid companies.
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
Constituents are reviewed semi-annually and changes take effect on the first business day of January and July.
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
Banking and Industrial Goods are each limited to ten companies while Insurance and Consumer Goods hold fifteen and Oil and Gas holds seven, so a bank ranked eleventh by size and liquidity stays out of the index.
References
- Nigerian Exchange: Nigerian Exchange Group, NGX Reveals Results of Review of Market Indices, as published 2022. Every rule described on this page is taken from this document.
Current NGX Banking Index constituents
Nigerian Exchange publishes and licenses the NGX Banking 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.
- Emerging Markets 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 NGX Banking Index?
Nigerian Exchange maintains the NGX Banking Index and publishes the methodology document that defines its eligibility and weighting rules.
What does the NGX Banking Index measure?
It measures banking sector companies listed on the Nigerian Exchange. 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 NGX Banking Index constituents?
Nigerian Exchange publishes the current constituent list. Swoopr does not republish it, because index providers license constituent data and Swoopr holds no such licence.