Copper Analysis: Six Months That Rewrote Every Assumption

In Q4 2025, LME copper broke above $11,200 and finished the year near $12,000. By January 29, 2026, it hit $14,527 — an all-time high. Six months later, the market is still processing what happened: a 47% rally built on documented supply losses at four Tier 1 mines, a smelter feedstock crisis that turned treatment charges negative, and an inventory dislocation that broke the LME-COMEX arbitrage.

Supply: the deficit deepened at every checkpoint

Grasberg. In Q4 2025, the market assumed a 6-9 month recovery after the September mudslide. By May 2026, Wood Mackenzie had pushed full recovery to 2028, with the mine at 40-50% capacity. Freeport's 2026 Grasberg output guidance: ~0.7 billion lb, against an original plan of 1.7 billion lb. (FACT: CNBC/Wood Mackenzie, Freeport guidance) That is a 60% production gap from a single facility.

Kamoa-Kakula. Ivanhoe Mines' original 2026 guidance of 380,000-420,000 tonnes was cut to 290,000-330,000 tonnes in the March 31 technical report revision. (FACT: Ivanhoe Mines, March 31, 2026)

Cobre Panama. The First Quantum mine remains closed with no restart timeline. (FACT: Columbia CGEP, May 2026)

Quebrada Blanca. Teck's QB2 produced 207,800 tonnes in 2024 and is expected at 270,000-310,000 tonnes through 2028, below original targets. (FACT: Teck Resources)

The cumulative effect: ING's 2026 deficit forecast tripled from ~200,000 tonnes in Q4 2025 to ~600,000 tonnes by May 2026. (FACT: ING Think) J.P. Morgan similarly revised its outlook, citing consistent supply underperformance at multiple Tier 1 assets. (FACT: J.P. Morgan)

The smelter collateral damage

The concentrate shortage has produced a downstream crisis. The 2026 annual TC/RC benchmark settled at $0/t, down from $21.25/t in 2025. Spot TCs hit -$90/t in March 2026, meaning smelters paid miners to take concentrate. (FACT: Columbia CGEP, Mining.com) China's CSPT agreed to cut >10% of smelter output. CRU estimates this removes ~1 million tonnes of concentrate demand. (FACT: CRU, SMM)

The IEA warns that custom smelters outside China — in Japan, Europe, and South Korea — are even more exposed because they lack by-product revenue streams and state support. (FACT: IEA, March 2026)

Inventory: the geography of apparent abundance

Combined LME+SHFE+COMEX inventories exceeded 1 million tonnes — the highest in 23 years. Yet prices rose. The paradox resolves on breakdown: COMEX held a record 548,000 tonnes of tariff-driven stockpiles, while LME on-warrant stocks outside China fell well below 100,000 tonnes. (FACT: LME, COMEX, Reuters) J.P. Morgan calls this "significant inventory dislocation." The copper is in the wrong place.

Demand: AI changes the math

China's Yangshan premium recovered from $20/t in January to $65/t in April, confirming returning import demand. (FACT: Reuters, April 9, 2026) Outside China, AI data centre construction has emerged as an unexpected demand driver — consuming copper at rates not in any 2024 forecast. The energy transition continues providing steady growth. The primary risk is Chinese macro: May 19 data missed expectations across retail sales, industrial production, and fixed asset investment. (FACT: Trading Economics)

What changed from Q4 2025 to May 2026

Four things, each reinforcing the others: (1) Grasberg went from assumed recovery to multi-year deficit, (2) Kamoa-Kakula guidance was cut 25%, (3) TC/RCs collapsed from $21/t to -$90/t, triggering smelter cuts, and (4) US tariff expectations reshaped global trade flows, creating the COMEX-LME dislocation.

What we do not know

• Supply response timing. How quickly new capacity comes online depends on permitting, financing, and geopolitical stability — all uncertain.
• Demand elasticity at current prices. The extent to which high prices will destroy demand is debated, with no consensus on the price threshold.
• Policy and tariff trajectory. Trade policy remains unpredictable and could shift the supply-demand balance abruptly.