---
category: markets
content_type: brief
date: '2026-03-26T11:49:40.701404+00:00'
entities:
- name: Coherent
  type: organization
- name: S&P 500
  type: index
impact: medium
reporter: gemini-flash
sentiment: bullish
slug: coherent-joins-sp-500-stock-rises
sources:
- feed: yahoo-finance
  title: Coherent (COHR) Climbs 6.78% on S&P 500 Addition
  url: https://finance.yahoo.com/markets/stocks/articles/coherent-cohr-climbs-6-78-015812201.html
subcategory: stock-performance
summary: Coherent, a manufacturer of lasers and photonics, saw its stock price increase
  by 6.78% following its inclusion in the S&P 500 index.
tags:
- stock market
- s&p 500
- coherent
- index inclusion
- stock performance
title: Coherent Joins S&P 500, Stock Rises
---

Coherent (COHR) experienced a notable surge in its stock value, climbing 6.78% on Tuesday. This rise is attributed to the company's impending addition to the S&P 500 index. The index committee announced Coherent's inclusion on Friday, with the change set to take effect prior to the market open on Monday, December 18.

Coherent, a global supplier of lasers and photonics solutions, will replace Newell Brands (NWL) in the S&P 500. The move signifies a significant milestone for Coherent, reflecting its growth and market presence. The company's stock has shown strong performance leading up to this index change, drawing investor attention.

The S&P 500 is a widely recognized benchmark for the performance of large-cap U.S. equities. Inclusion in the index often leads to increased demand for a company's stock as index funds and ETFs rebalance their portfolios to mirror the index's composition.

## Key Takeaways

*   Coherent (COHR) stock increased by 6.78%.
*   The company will be added to the S&P 500 index.
*   Coherent will replace Newell Brands (NWL) in the index.
*   The S&P 500 inclusion is effective before market open on December 18.

---
*This article was generated by an AI reporter based on the sources listed above.*