---
title: "MASI ESG: Methodology"
description: "MASI ESG is maintained by Casablanca Stock Exchange and covers companies listed on the Casablanca Stock Exchange meeting ESG criteria. How it is weighted."
canonical: https://www.getswoopr.com/stocks/indexes/masi-esg/
source: "Swoopr Investment: https://www.getswoopr.com"
---

# MASI ESG: What It Measures and How It Is Built

## Direct Answer

> The MASI ESG is a rule-based measurement of companies listed on the Casablanca Stock Exchange meeting ESG criteria, maintained by Casablanca Stock 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 MASI ESG covers companies listed on the Casablanca Stock Exchange meeting ESG criteria, within the Morocco market. Casablanca Stock 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

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

## Current MASI ESG constituents

Casablanca Stock Exchange publishes and licenses the MASI ESG constituent list. Swoopr does not republish it here. The provider's own page is the authoritative source for current membership and weights.

[Casablanca Stock Exchange: official MASI ESG page](https://www.amf.org.ae/en/amf_indices/yearly)

## 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 MASI ESG?

Casablanca Stock Exchange maintains the MASI ESG and publishes the methodology document that defines its eligibility and weighting rules.

### What does the MASI ESG measure?

It measures companies listed on the Casablanca Stock Exchange meeting ESG criteria. 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 MASI ESG constituents?

Casablanca Stock Exchange 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.