Copper prices have suffered a historic reversal.
From the Trading Desk at Stipelis
It’s The Strategy Session for July 31, 2025
Copper Crashes on Tariffs
Copper prices have suffered a historic reversal. Over the past 48 hours, futures on the COMEX have collapsed by more than 20%—marking the sharpest two-day decline in market history. The July rally is officially over, and copper now trades nearly 25% below its recent highs.
The catalyst? A dramatic mismatch between market expectations and tariff reality.
What Triggered the Collapse?
Earlier in July, copper surged on speculation that the U.S. would impose a 50% tariff on most copper imports—especially refined forms. This triggered a rush to front-load shipments and build long positions.
But the actual policy, announced by President Donald Trump on July 30, was far more selective than anticipated. The 50% tariff applies only to semi-finished copper products like pipes, wires, rods, and sheets. Critically, it excludes the most traded forms—copper cathode, ore, concentrate, and scrap.
The reaction was swift:
- Traders rushed to unwind long positions, causing prices to crater.
- U.S. copper futures lost their premium to the global benchmark (LME).
- Technical damage deepened the move, as support levels were breached and margin calls accelerated selling.
This was not just a policy error—it was a positioning blow-up. The U.S. copper market had already seen a surge in inventory in anticipation of supply shortages that never materialized. With refined copper exempted, there is no impending import squeeze—only excess.
Strategic Implications: What Now?
The question is not just why this happened—but what now?
Active Traders:
- Expect elevated volatility and whipsaws in the near term.
- Any dead-cat bounce could present a shorting opportunity until new support stabilizes.
- Watch positioning data and COMEX open interest—unwinding may not be over yet.
Allocators and Macro PMs:
- Reassess industrial metals exposure—particularly if you bought copper as a hedge against tariffs or inflation.
- Consider rotating toward less tariff-sensitive assets (e.g., aluminum, gold, or rare earths).
- Global arbitrage may reprice U.S.-based contracts versus LME—use cross-exchange spreads tactically.
Systematic/CTA Strategies:
- Trend and momentum models are likely triggering full copper exits.
- Recalibrate volatility filters—this week’s spike is likely to reset position sizing across most rules-based funds.
- Monitor if this spillover hits broader base metals or is contained to copper.
Final Word
The copper market just got a violent reminder: macro expectations are powerful—but when they break, they break fast. This wasn’t about fundamentals or demand. It was about misplaced positioning, policy surprise, and technical fragility.
The dust hasn’t settled yet. For now, caution—and discipline—should lead every strategy.