# CAC 40 index market performance

> Developing situation record from CLSTR: https://clstr.news/situations/cac-40-index-market-performance
> Updated: 2026-10-27T23:37:55.000Z. Sources: 5. Developments: 2.

The CAC 40 index on Euronext Paris experienced a period of volatility. In late October, the index initially saw a decline, falling 0.31 percent to 7,786.74 points during a Friday morning session, contributing to a weekly loss of 1.25 percent.

By the following Thursday, the index reversed this trend, rising 0.73 percent to 7,944.31 points. During this period, L'Oréal maintained the highest market capitalization among constituents, while companies such as Airbus SE and Stellantis were noted for high trading volumes. Other developments included Air Liquide expanding its semiconductor industry presence with a new plant in South Korea.

## Timeline

### 2026-10-27: CAC 40 index shows upward trend in Euronext trading

The CAC 40 index rose 0.73 percent to 7,944.31 points during Euronext trading, driven by gains in major constituents like L'Oréal and Airbus.

4 sources. https://clstr.news/cluster/cac-40-index-shows-upward-trend-in-euronext-trading

### 2026-10-23: CAC 40 index performance and composition overview

The CAC 40 index saw a decline to 7,786.74 points on Friday, continuing a downward trend for the week and year.

2 sources. https://clstr.news/cluster/cac-40-index-performance-and-composition-overview

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Cite as: CAC 40 index market performance. CLSTR, https://clstr.news/situations/cac-40-index-market-performance