---
title: "Corning tumbles 18% after earnings, leading rout in optical stocks"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/294086929.md"
description: "Corning shares plummeted 18% after reporting Q2 earnings that beat estimates but featured weak forward guidance, with core revenue forecast of $4.9-5 billion falling short of Wall Street's $5 billion consensus. This disappointment triggered a broader sell-off in optical stocks, including Marvell, Lumentum, AXT, and Coherent, all down double digits, despite Corning's strong historical ties to AI data center infrastructure."
datetime: "2026-07-28T15:18:36.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/294086929.md)
  - [en](https://longbridge.com/en/news/294086929.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/294086929.md)
---

# Corning tumbles 18% after earnings, leading rout in optical stocks

CHINA - JUNE 17: A man works Thursday, June 17, 2004 in the Beijing office of Corning International which imports fiber-optic products from the U.S. to China.

Ricky Wong | Bloomberg | Getty Images

Shares of glassware maker Corning dove 18% on Tuesday after the company reported its second-quarter earnings, dragging down other optical component names in the artificial intelligence space.

Despite the company posting a beat on the top and bottom lines, revenue forecasts for the current quarter fell below Wall Street's consensus. The company expects core revenue to grow 16%, a range of $4.9 billion to $5 billion. Factset expected $5 billion.

Corning reported earnings per share before the bell on Tuesday of 78 cents versus estimates of 76 cents. Revenue came in at $4.74 billion, also topping the Street's estimates of $4.61 billion.

The stock was on pace for its worst day since July 30, 2002, when it fell 21.59%.

Shares of other optical component names like Marvell, Lumentum, AXT and Coherent were down double digits following the print.

Corning's networking solutions and fiber optic cable have become a growing portion of the AI data center buildout, since their equipment enables fast connections between the facilities and the racks and chips inside.

In June, Corning inked its latest multi-year deal to power and connect Amazon's expanding fleet of data centers, one in a string of billion-dollar deals it's inked in recent months as hyperscalers and other AI companies race to meet their skyrocketing demand for computing power.

_CNBC's Katie Tarasov contributed to this report._

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