---
title: "How a niche copper trade became a real-time gauge of Trump’s next tariff move"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/295884708.md"
description: "The widening price of copper between two metals exchanges is offering investors a gauge of U.S. tariff risk."
datetime: "2026-08-14T05:14:41.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/295884708.md)
  - [en](https://longbridge.com/en/news/295884708.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/295884708.md)
---

# How a niche copper trade became a real-time gauge of Trump’s next tariff move

The widening price of copper between two metals exchanges is offering investors a gauge of U.S. tariff risk.

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