By: Editorial Team, StoneX Media
The overdue U.S. Section 232 decision on refined copper has become the single largest catalyst hanging over the copper market, and it can resolve in four broadly different ways. Those outcomes run from immediate tariffs at one extreme to no tariffs at all at the other, with a middle path where duties stay on the table but arrive late, phased, or with country exemptions. Each route sends copper supply and the COMEX-LME arbitrage in a different direction, which is why the gap between the extremes matters so much for physical buyers. For commercial metal consumers, the question is less about a single headline number and more about how well supplied copper stays outside the U.S., or how tight it grows.
Natalie Scott-Gray, StoneX Senior Metals Analyst covering EMEA and Asia, has more than 12 years of experience following LME and battery-material metals and tracking copper supply and demand, including refined copper flows, base metals, and the trade policy shaping them.
"The most bullish would be immediate tariffs, which would widen the COMEX-LME arbitrage and pull even more copper into the U.S.", Scott-Gray says of the top-end outcome. That arbitrage is the mechanism at the center of the copper decision, because a wide gap between COMEX and London Metal Exchange prices rewards shipping metal into the U.S. At the opposite extreme, a no-tariff outcome would likely let that arbitrage unwind and strip out much of the incentive to build new U.S. smelting capacity. Consequently, the same ruling can either deepen the pull of copper toward American warehouses or reverse it almost entirely, leaving supply outside the U.S. looser. For physical buyers, that split is the difference between chasing metal into a tightening U.S. market and sourcing comfortably from elsewhere.
The middle of the range, not the extremes, is where the copper decision is most likely to settle. According to Scott-Gray, "the most likely outcome is that tariffs remain on the table, but implementation is delayed, phased in, or includes country exemptions following further negotiations". Such a path would keep the COMEX-LME arbitrage open, though probably not at the full implied tariff premium, so copper would still be drawn toward the U.S. without the abrupt shock of an immediate levy. As a result, commercial buyers face a slow tightening of copper supply rather than a sudden one, giving more room to plan coverage than either extreme would allow. The practical takeaway is that the copper market may spend months pricing a partial, negotiated outcome instead of a clean yes or no.
Access live prices, supply and demand data, and actionable market commentary focused on the Metals sector. Sign up for StoneX Market Intelligence today and see how our Metals insights can elevate your strategy.
Sign up for a Market Intelligence trial today
--- Written by Gus Farrow, Senior Manager, StoneX Media
--- Expert: Natalie Scott-Gray, StoneX Senior Metals Analyst EMEA & Asia
The subsidiaries of StoneX Group Inc. provide financial products and services, including, but not limited to, physical commodities, securities, clearing, global payments, risk management, asset management, foreign exchange, and exchange-traded and over-the-counter derivatives. These financial products and services are offered in accordance with the applicable laws in the jurisdictions in which they are provided and are subject to specific terms, conditions, and restrictions contained in the terms of business applicable to each such offering. Not all products and services are available in all countries. The products and services offered by the StoneX Group of companies involve risk of loss and may not be suitable for all investors. Full Disclaimer. This content is not intended for residents of any particular country, and the information herein is not advice nor a recommendation to trade nor does it constitute an offer or solicitation to buy or sell any financial product or service, by any person or entity in any jurisdiction or country where such distribution or use would be contrary to local law or regulation. Please refer to the Regulatory Disclosure section for entity-specific disclosures. No part of this material may be copied, photocopied or duplicated in any form by any means or redistributed without the prior written consent of StoneX Group Inc. The information herein is provided for informational purposes only. This information is provided on an ‘as-is’ basis and may contain statements and opinions of the StoneX Group of companies as well as excerpts and/or information from public sources and third parties and no warranty, whether express or implied, is given as to its completeness or accuracy. Each company within the StoneX Group of companies (on its own behalf and on behalf of its directors, employees and agents) disclaims any and all liability as well as any third-party claim that may arise from the accuracy and/or completeness of the information detailed herein, as well as the use of or reliance on this information by the recipient, any member of its group or any third party.
© 2026 StoneX Group Inc. all rights reserved.
Our subscribers have access to comprehensive market analysis from StoneX spanning commodities, equities, currencies and more.
China property and construction weakness is quietly capping demand across the base metals suite, even as high-tech exports boom. The split leaves copper and battery metals leaning on targeted industrial policy rather than a broad economic rebound.
DRC Bans Copper and Cobalt Exports - What Do We Need to Know?
An overdue U.S. Section 232 ruling on refined copper could land in four very different ways, from immediate tariffs to none at all. Each path points copper supply and the COMEX-LME arbitrage in a distinct direction for buyers on both sides of the Atlantic.
Our market expertise, advanced platforms, global reach, culture of full transparency and commitment to our clients’ success all set us apart in the financial marketplace.
Reach
With access to 40+ derivatives exchanges, 180+ foreign exchange markets, nearly every global securities marketplace and numerous bilateral liquidity venues, StoneX’s digital network and deep relationships can take clients anywhere they want to go.
Transparency
As a publicly traded company meeting the highest standards of regulatory compliance in the markets we serve, our financials and track record are matters of public record. StoneX’s commitment to “doing the right thing over the easy thing” sets us apart in the industry and helps us build respect, client trust and new partnerships.
Expertise
From our proprietary Market Intelligence platform to “boots-on-the-ground” expertise from award-winning traders and professionals, we connect our clients directly to actionable insights they can use to make more informed decisions and achieve their goals in the global markets.
