---
title: "Broadcom sneezed and COPJ investors lost 11% in a day and learned that copper’s AI story has a pause button"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/289048179.md"
description: "The Sprott Junior Copper Miners ETF (COPJ) dropped 11% on June 5, 2026, following Broadcom's weak AI semiconductor revenue guidance and a strong May payrolls report. The sell-off highlights risks to copper demand from potential pauses in AI data center buildouts and higher Treasury yields impacting capital-intensive junior miners."
datetime: "2026-06-08T11:31:38.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/289048179.md)
  - [en](https://longbridge.com/en/news/289048179.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/289048179.md)
---

# Broadcom sneezed and COPJ investors lost 11% in a day and learned that copper’s AI story has a pause button

Quick ReadCOPJ fell 11% in one session yet retains a 93% one-year return, as junior miners structurally amplify copper price moves 2x to 3x.Broadcom's lighter Q3 AI revenue guidance threatened the hyperscaler data center buildout that has become copper's fastest-growing demand engine.Watch hyperscaler capex commentary next earnings. If others echo ...

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