Copper update May 20-27: ICSG abandons surplus, now forecasts 150kt 2026 deficit (first since 2009); LME hit record $6.65/lb May 13; sulphuric acid ban by China compounds SX-EW supply risk; FCX Grasberg Phase 2/3 ramp started March end. Thesis conviction supportable upgrade to medium-high.

Autoresearch: Copper supercycle — May 20–27 update

Generated by /autoresearch on 2026-05-27. Synthesized from 3 WebSearch queries (snippet-level data; WebFetch universally 403-blocked). See Provenance. Context: vault/projects/stock-market

Summary

Three significant developments since the 2026-05-20-autoresearch-fcx-grasberg-q2-2026-restart-copper-lme update. First, the ICSG has officially abandoned its 2026 surplus forecast and now projects a 150,000-tonne deficit — the market's first structural copper shortage since 2009. This directly resolves the Goldman-vs-ICSG contradiction that kept the copper-supercycle-ai-data-centers thesis at medium conviction. Goldman's 160kt surplus call is now the contrarian position. Second, copper LME hit a new record of $6.65/lb ($13,650/tonne) on May 13, before consolidating to $13,100–$13,400. Third, China officially banned sulphuric acid exports from May, deepening the SX-EW production disruption already flagged in the prior research — directly threatening ~20% of global refined copper output while FCX (Grasberg) remains protected. Thesis conviction upgrade to medium-high is now supported by the evidence.

Findings

1. ICSG abandons surplus forecast — now projects 150,000-tonne 2026 deficit

This is the key update. The International Copper Study Group, which is the authoritative industry body tracking copper supply/demand balances, has officially reversed its earlier surplus projection. From ainvest.com: ICSG moved from a projected 209,000-tonne surplus (October 2025) to a 150,000-tonne deficit for 2026 — the first ICSG deficit call since 2009.

Analyst positioning:

ICSG: 150,000-tonne deficit (the authority; revised upward from 150kt earlier mentioned in the wiki)
J.P. Morgan: 330,000-tonne shortfall (cited by discoveryalert.com.au)
Goldman Sachs: 160,000-tonne surplus — now the outlier; holds the contrarian bearish position
Morgan Stanley: most bearish supply view at 600,000 tonnes (appears to be a supply-disruption figure, not directly comparable)

The Goldman surplus call, which was the primary contradiction in copper-supercycle-ai-data-centers, is now isolated. ICSG and J.P. Morgan align on a deficit; Goldman is alone. Conviction upgrade from medium to medium-high is now justified by the weight of evidence.

2. Copper LME hit record $6.65/lb ($13,650/tonne) on May 13, 2026

COMEX 3-month copper peaked at $6.65/lb on May 13, 2026 — a new record — per ainvest.com. Subsequently consolidated to approximately $13,100–$13,400/tonne range (consistent with the $13,380 figure from the May 18 prior clipping). The record is meaningful: the market is pricing the deficit consensus, not Goldman's surplus.

3. FCX Grasberg Phase 2/3 restart: initial ramp-up started late March 2026

From MINING.com / StockTitan snippets:

Remediation and restoration for Blocks 2 and 3 completed in Q1 2026
Initial ramp-up activities began at end of March 2026 — slightly ahead of the "Q2 2026" guidance in prior research
Production Block 1 restart deferred to 2027 (consistent with mid-2027 full capacity timeline already in wiki)
FCX full-year 2026 guidance: ~1.0B lbs copper (unchanged from prior update)
Approximately 85% of normal production rates expected by H2 2026

FCX-thesis implication: The Q2 restart is proceeding as guided. The key metric to watch at FCX Q2 earnings (July) is whether actual copper sales volumes are recovering and whether unit costs are declining toward the $1.75/lb baseline. The "mid-2027 full capacity" timeline remains operative.

4. China sulphuric acid export ban from May — deepens SX-EW supply disruption

Mining Weekly May 6, 2026: Acid shortage is now the dominant factor in copper economics for SX-EW producers.

China banned sulphuric acid exports from May 2026 (confirming and extending what was flagged in the prior clipping as a risk)
~20% of global refined copper is produced via SX-EW (solvent extraction-electrowinning), requiring ~2.5 tonnes of sulphuric acid per tonne of copper
Roughly half of global seaborne sulphur trade transits Hormuz; Middle East refinery disruptions have additionally tightened supply
Sulphuric acid prices in some regions have nearly doubled since the conflict began
Crux Investor: "Financial flows repricing copper; capital shifting toward low-cost producers"

Producer-level impact:

FCX (Grasberg): Protected — uses pyrometallurgical process. The acid ban does NOT affect Grasberg's copper output.
SCCO: Direct exposure — Chilean and Peruvian SX-EW operations are acid-dependent. Chilean acid prices reportedly +44% (per prior research). SCCO faces input cost pressure on ~portion of its 915K ton 2026 guidance.
DRC producers: Goldman estimates Congo could curtail ~125,000 tons of output in 2026 if supply chain delays extend through June.

Investment implication: The acid ban bifurcates risk — FCX (Grasberg → pyrometallurgical) is protected; SCCO (SX-EW exposure) faces margin compression. FCX's relative insulation from the acid crisis is an underappreciated advantage vs. SCCO in the near term.

5. Geopolitical shocks reinforce bullish copper case

Sprott/Northern Miner and NAI 500: Multiple geopolitical shocks are reinforcing the structural deficit view — Middle East Hormuz disruptions (sulphur/acid); China export controls (acid ban, REE restrictions); supply disruptions in DRC and Peru. These are cumulative, not reversible in the short run.

Contradictions and open questions

Goldman remains bearish (160kt surplus): Goldman's forecast is now isolated vs. ICSG (150kt deficit) and J.P. Morgan (330kt shortfall). The key Goldman bull-case objection: China demand weakness could overwhelm AI demand. A Goldman revision to deficit would be a major market catalyst.
SCCO vs. FCX bifurcation: The acid exposure is now material enough to reconsider whether SCCO's conviction should remain "medium-high" vs. FCX's "medium." SCCO faces margin compression; FCX is protected.
FCX Q2 earnings (July): Critical checkpoint — is the Grasberg ramp yielding volumes as planned? If Block 2/3 ramp produces volumes above the 1.0B lb annual pace by Q2 end, that's a positive data point.

Provenance

Rounds run: 1 round (early exit — search snippets covered the key questions)

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Tools used: WebSearch (3 queries). Generated: 2026-05-27