Copper's Rally Rests on Hedge Funds and Their Longs Are Stretched

Copper has jumped close to 40% since breaking out of its three-year upward trending channel, and a significant share of that move has come from speculative investors rather than physical buyers. Managed money net longs on the Comex have approached 30% of open interest, a level that puts hedge funds, commodity trading advisers and macro money among the largest single supports under the price. That same concentration is what makes the rally fragile, because positioning that heavy has to be unwound at some point. Copper is now carrying both a genuine physical story and a crowded financial one, and the two do not have to unwind together.

Natalie Scott-Gray is StoneX Senior Metals Analyst EMEA and Asia, with more than 12 years covering London Metal Exchange and battery material metals and providing market analysis for the firm and its clients. She works across copper, base metals and metals supply and demand, alongside precious and energy markets, which is the ground where physical flows and speculative money meet in this rally.

Key Themes

• Managed money net longs on the Comex have approached 30% of copper open interest.
• Copper's price correlation with U.S. technology stocks is at its highest level since 2012.
• Comex managed money long positions sit near five-year highs while open interest appears to have peaked.

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Speculative Investors Are Supplying a Third Leg of Copper's Record Move

"Significant upward support has come from speculative investors, with copper's draw as a hard alternative asset and use within AI attracting both macro and retail money", Scott-Gray says, placing that flow alongside tariff uncertainty and constrained mine supply as the third driver of the move. The mechanism matters for anyone buying physical copper, because this money is not responding to consumption. It is buying an asset, which means it can arrive and leave far faster than a smelter or a fabricator can adjust. The price copper is discovering reflects investor appetite as much as it reflects the balance between mined units and industrial demand.

Copper's Correlation With U.S. Technology Stocks Imports Equity Risk

The clearest evidence of how far that financial ownership has gone sits in what copper now moves alongside. Over the last 12 months, Scott-Gray notes, "we've seen copper's price correlation with U.S. tech stocks hit its highest level since 2012", a relationship built on copper's use within artificial intelligence and data center buildout. In practice that means an equity market drawdown can now reach copper through a channel that has nothing to do with concentrate, warehouses or ore grades. For a commercial buyer, the exposure being hedged has quietly widened, and the same is true in reverse when technology sentiment is strong.

Crowded Comex Positioning Leaves Copper Exposed to a Sharp Reversal

Three signals now point the same way on positioning, with Comex managed money long positions near five-year highs, open interest that appears to have peaked, and copper trading with unusually high volatility. The physical backdrop does not remove that risk, because new capacity additions are set to see mine supply growth rebound strongly in 2027 while the global market balance stays in surplus, leaving the London Metal Exchange as the market of last resort and the tightness regional rather than worldwide. Weakness in China, the largest market for copper, adds a second pressure point, with manufacturing having slipped into recession for the last two months. According to Scott-Gray, "the market could be vulnerable to a sharp reversal if prices fall, the S&P 500 weakens or expected tariff support fails to materialize".

 

--- Written by Frédéric Guétin, StoneX Media Producer

--- Expert: Natalie Scott-Gray, StoneX Senior Metals Analyst EMEA & Asia