Copper Weekly returns for episode six — and while the US tariff saga rumbles quietly in the background, the real focus this week is a potential structural shift that could reshape how the entire copper concentrate market is priced. Mike and Albert take a deep dive into Antofagasta's reported move towards spot index-linked treatment charges and what it could mean for the benchmark system that has underpinned the market for decades.

In this episode:

Still Waiting on Tariffs — No official word on the Section 232 announcement, though sources indicate it remains under active review in Washington. Albert explains why the arbitrage hasn't collapsed and why the market continues to trade sideways in a wait-and-see mode.

Antofagasta Breaks Ranks — Reports suggest Antofagasta has agreed spot index-linked concentrate sales with a number of Chinese smelters. As the de facto benchmark negotiator alongside Freeport, this is a potentially seismic move. Albert unpacks why it matters and how the benchmark system has traditionally functioned.

The End of the Benchmark? — Could the benchmark and spot-linked systems coexist, or is this the beginning of the end? Albert explains why market consensus, particularly outside China, will determine whether the shift truly takes hold.

How the Deals Actually Work — Floors, ceilings, price reporting agencies and multi-index aggregates. Albert demystifies the mechanics of spot index-linked pricing and why spot doesn't necessarily mean buying more material on the spot market.

Who Wins? — With a huge gap between benchmark and spot levels, Albert explores who benefits in the short term versus the long term, why the move makes strategic sense for Antofagasta, and how a fully spot-linked market might eventually push aggregate TCs higher and force weaker smelters to close.

Why Would Smelters Agree? — From forced hands to bets on turning acid prices, Albert lays out why smelters might accept a deal that looks net negative today, and why European, Japanese and Korean players are likely to resist hardest.

The Week Ahead — Whether this opens the floodgates hinges almost entirely on what happens outside China. Albert flags the trust in spot indices and pressure from miners as the key factors to watch.

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