Copper to $6.60 by end-Q3 2026: the mine-supply crunch case

COMEX copper reaches $6.60/lb by September 30, 2026 in the base case, $7.00 in the bull case, and $5.60 in the bear case — a call built on a stack of documented mine-supply failures colliding with demand that has not yet rolled over.

Copper trades at $6.17/lb on COMEX as of July 9, 2026, up 2% on the day after bouncing from a two-week low near $6.05 (TradingEconomics, July 9, 2026). The single most important input is supply: Grasberg is running at roughly 60% of capacity, Kamoa-Kakula has cut guidance 22.5%, and Chilean output fell 9% year on year in the first quarter (S&P Global via Investing News Network). The rest of this note walks the data, the mechanism, and the four signals that would kill the call.

Key Levels:

• Asset: Copper (COMEX front month) at $6.17/lb; LME three-month around $13,371/t at the June 23 reference — TradingEconomics, July 9, 2026 / INN Q2 review
• Base case target: $6.60/lb by September 30, 2026 — supply-deficit repricing toward the May record
• Bull case target: $7.00/lb — fires if US refined-copper tariff clarity triggers restocking while Grasberg stays at 60%
• Bear case target: $5.60/lb — fires if Chinese apparent demand turns negative in H2 as 2025’s stimulus payback arrives
• Major support: $6.00–6.05/lb — the July 8 two-week low and round-number shelf
• Major resistance: $6.67–6.72/lb — the May 13 COMEX record zone
• Invalidation level: a weekly close below $5.90/lb — breaks the 2026 uptrend structure

Methodology

This call blends three inputs: exchange pricing and momentum from COMEX and the London Metal Exchange (LME) as of July 9, 2026 (TradingEconomics); mine-supply and demand data from S&P Global and the Investing News Network’s Q2 2026 review, covering January–June 2026; and named sell-side forecasts from Citi, Goldman Sachs and StoneX published between January and June 2026. Caveats: Chinese demand data arrives with a lag and is revision-prone, the Shanghai Futures Exchange positioning picture is only visible weekly, and the sulfuric-acid disruption from the Strait of Hormuz closure is a genuinely novel input with no clean historical analogue.

Related:Gold to $4,400 by end-Q3 2026: the Warsh-pivot upgrade

The data: a supply ledger that keeps getting worse

The 2026 copper story is not a demand boom — it is a supply failure arriving in instalments. Grasberg, the world’s second-largest copper mine, is operating at roughly 60% of capacity with full recovery now pushed to 2028. Ivanhoe’s Kamoa-Kakula complex in the Democratic Republic of Congo cut 2026 guidance by 22.5% to 290,000–330,000 tonnes. Chile — the largest producing nation — saw output decline 9% year on year in the first quarter against a forecast of 3.7% growth (S&P Global via INN, Q2 2026 review).

Sources: TradingEconomics (July 9, 2026), Investing News Network Q2 2026 copper review, S&P Global. Time window: January–July 2026.

What is driving copper prices in 2026? The primary driver is a documented shortfall in mine supply rather than a demand surge. Three of the market’s most important sources of new units have failed simultaneously: Grasberg in Indonesia is at roughly 60% of capacity until at least 2028, Kamoa-Kakula in the DRC has cut its 2026 guidance by 22.5% to 290,000–330,000 tonnes, and Chilean national output fell 9% year on year in the first quarter instead of growing the forecast 3.7% (S&P Global via INN). Layered on top, the Strait of Hormuz closure disrupted sulfuric acid supply — a critical leaching input — lifting Middle East acid prices to $820/t. With Chinese apparent consumption still up 9% year on year in April, the deficit maths, not sentiment, explains a market 10.5% higher year to date.

“Supply chain obstacles have now layered on top. The Strait of Hormuz closure following the US-Israel war with Iran…has introduced a new and compounding set of supply-side risks.”

— Ruilin Wang, analyst, S&P Global Commodity Insights
(Investing News Network)

The mechanism: why the deficit repricing has room to $6.60

Deficit markets reprice in steps, and each step needs a catalyst. The next ones are queued: sulfuric-acid costs feeding into cathode economics through the third quarter, US refined-copper tariff clarity that would release pent-up restocking, and the seasonal September Chinese grid-orders window. Citi’s commodities team has the most aggressive version of this view, forecasting $14,500/t within a month of its June note and $15,000/t within a year — roughly $6.80/lb COMEX-equivalent (CNBC). Our base case is deliberately less ambitious: $6.60/lb only requires the market to close half the gap to May’s record while supply guidance keeps deteriorating.

Is copper a supply-deficit market in 2026? By the production ledger, yes. A supply deficit means refined output falls short of consumption, forcing prices to ration demand, and 2026’s numbers fit the definition: Chile, the largest producer, saw first-quarter output fall 9% year on year against a forecast of 3.7% growth; Grasberg, the second-largest mine, is stuck near 60% of capacity until 2028; and Kamoa-Kakula’s guidance cut removed roughly 85,000–95,000 tonnes from expected supply (S&P Global via INN). Against that, Chinese apparent consumption grew 9% year on year in April, Chinese electric-vehicle and hybrid exports rose 140% in March, and battery shipments ran 16% above the Q4 2025 average. S&P Global’s Ruilin Wang still projects a $12,600/t average LME price for 2026 — 26% above the 2025 average — which is what a rationing market looks like when it is written down in forecast form.

The steelman against: prices already carry a large risk premium. Wang’s own 2026 average forecast of $12,600/t LME sits below the Q2 peak of $14,196.50/t, implying S&P Global expects mean-reversion, not melt-up. If Hormuz-linked disruptions normalise the way crude’s war premium has — a dynamic covered in our WTI supply-normalisation call — part of copper’s 2026 bid unwinds with it.

What the model misses

Two things. First, Chinese demand quality: April’s +9% apparent consumption partly reflects front-loading — Q4 2025 printed -8% year on year once stimulus effects faded, so H2 2026 could deliver the same payback. Shanghai positioning agrees with the sceptics: net shorts on the Shanghai Futures Exchange sat at their widest since 2021 in the July read. Second, the COMEX-LME premium is policy-made: a US tariff decision can compress the arbitrage violently in either direction, and this call is expressed in COMEX terms. The historical analogue is 2024’s squeeze-and-collapse, when COMEX copper set a record in May and gave back 20% within ten weeks — momentum built on positioning rather than physical tightness unwinds fast.

“We feel that the price has overshot its fair fundamental level.”

— Goldman Sachs commodities research, on copper’s rally above fundamental value
(Goldman Sachs Insights)

What would invalidate this call

The base case to $6.60/lb breaks if ANY ONE of these four signals fires:

• A weekly COMEX close below $5.90/lb. That breaks the 2026 uptrend structure and the July support shelf; deficit narratives do not survive broken uptrends.
• Chinese apparent consumption prints negative year on year for two consecutive months. The demand leg of the deficit maths disappears and the SHFE short book gets paid.
• Grasberg guidance is upgraded or Kamoa-Kakula restores its cut. The call leans on supply failure persisting; any restoration of 100,000+ tonnes of guidance removes the core input.
• Sulfuric acid prices in the Middle East fall back below $500/t. That signals the Hormuz input-cost channel is normalising, taking the marginal-cost support out from under cathode pricing.

What to watch next

Three dates matter before the end of September: the weekly Shanghai Futures Exchange positioning reports (every Friday — watch for short-covering), China’s July and August apparent-consumption prints in mid-August and mid-September, and any US announcement on refined-copper tariffs, which remains the single most binary catalyst either way. On the chart, $6.00 support and the $6.67–6.72 record zone bracket the trade. The broader metals complex tells the same deficit story — see our Silver deficit-plus-pivot call and Gold Warsh-pivot upgrade for the precious-metals legs.

TL;DR

COMEX copper at $6.17/lb reaches $6.60 by September 30, 2026 in the base case. The driver is a stacked supply failure — Grasberg at 60% capacity, Kamoa-Kakula guidance cut 22.5%, Chilean Q1 output down 9% year on year (S&P Global via INN) — against Chinese apparent consumption still up 9% in April. Bull case $7.00 on tariff-clarity restocking; bear case $5.60 if China’s H2 demand payback arrives. The call dies on a weekly close below $5.90, two negative China demand prints, restored mine guidance, or Middle East sulfuric acid back under $500/t.

FAQ

What is the copper price forecast for Q3 2026?

Our base case puts COMEX copper at $6.60/lb by September 30, 2026, from $6.17 on July 9. The bull case is $7.00 on a tariff-clarity restocking squeeze; the bear case is $5.60 if Chinese demand rolls over. Citi is more aggressive, forecasting $15,000/t LME within a year.

Why are copper prices so high in 2026?

Supply, not hype: Grasberg is at roughly 60% capacity, Kamoa-Kakula cut guidance 22.5%, Chilean output fell 9% in Q1, and Hormuz-linked sulfuric-acid disruption raised processing costs — while Chinese apparent consumption was still growing 9% year on year in April (S&P Global via INN).

What is the biggest risk to the bullish copper case?

China. Q4 2025 apparent demand printed -8% once stimulus faded, and Shanghai Futures Exchange net shorts are at their widest since 2021. A repeat of that payback in H2 2026 flips the deficit narrative and targets $5.60.

What would confirm the move toward $6.60?

A weekly close back above $6.35 with SHFE shorts covering, another month of positive Chinese apparent consumption, and no restoration of Grasberg or Kamoa-Kakula guidance. US refined-copper tariff clarity would accelerate the timeline.

This article is informational analysis only and is not financial, investment, or trading advice. Foreign-exchange, commodity, and equity markets are highly volatile and can lose substantial value rapidly. Leveraged products carry total-loss risk and may exceed the initial margin posted. Past performance and historical correlations do not guarantee future results. Do your own research and consult a regulated financial adviser before making any investment decision.