---
title: "BSE Sensex: Methodology"
description: "BSE Sensex is maintained by Asia Index/BSE and covers 30 major bse-listed companies. How the index selects and weights its constituents, and what that means for what it measures."
canonical: https://www.getswoopr.com/stocks/indexes/bse-sensex/
source: "Swoopr Investment: https://www.getswoopr.com"
---

# BSE Sensex: What It Measures and How It Is Built







## Direct Answer



> The BSE Sensex is a rule-based measurement of 30 major bse-listed companies, maintained by Asia Index/BSE. 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 BSE Sensex covers 30 major bse-listed companies, within the India market. Asia Index/BSE 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



Swoopr has not verified the weighting method for this index against Asia Index/BSE's current methodology document, so none is stated here rather than guessed. The provider link below is authoritative.








## Current BSE Sensex constituents



Asia Index/BSE publishes and licenses the BSE Sensex 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](https://www.getswoopr.com/stocks/indexes/): how indexes are built, weighted and revised.
- [Asia-Pacific indexes](https://www.getswoopr.com/stocks/indexes/asia-pacific/): 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 BSE Sensex?



Asia Index/BSE maintains the BSE Sensex and publishes the methodology document that defines its eligibility and weighting rules.




### What does the BSE Sensex measure?



It measures 30 major bse-listed companies. 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 BSE Sensex constituents?



Asia Index/BSE 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.