Why BHP’s Copper Risk Could Reverse a 54% Share Price Gain

BHP is trading near an all-time high in the low A$60s in early September 2026, closing at A$63.78 on 3 September 2026 and up roughly 54% over the prior twelve months. The analysts now forecasting a copper price correction are not bears on copper’s long-term story. They are bears on the next twelve months specifically, and that distinction matters enormously if you are sitting on a large unrealised gain.

Copper now drives BHP’s valuation in a way it never has before, contributing 51% of Group Underlying EBITDA in the half-year ended 31 December 2025. What happens to copper prices over the next twelve months is therefore not a commodity question for you as a BHP shareholder. It is a share price question.

This maps the specific catalysts analysts have flagged as potential reversal triggers, ordered by how quickly each could materialise, so you can decide whether to hold, reduce, or exit before a reversal shows up in the price.

How copper became BHP’s most important number

You may hold BHP as a diversified large-cap position. The earnings data now tells a different story.

In the half-year ended 31 December 2025, copper delivered 51% of BHP’s Group Underlying EBITDA. That single figure reframes what you actually own: not a spread of commodities, but a copper business wrapped in a large-cap ticker.

The number that defines BHP’s risk profile in 2026: copper now supplies 51% of Group Underlying EBITDA, more than every other division combined.

The concentration shows up across the accounts. Consider the FY2025 baseline:

• Copper contributed 51% of Group Underlying EBITDA in the half-year ended December 2025
• Copper accounted for roughly 42% of production revenue in FY2025 (US$20.685 billion of approximately US$49.2 billion)
• BHP produced a record 2,017 kt of copper in FY2025, up 8% year on year and 28% versus FY2022

This is a shift from BHP’s traditional identity as an iron ore miner. Iron ore used to cushion copper’s swings, and that cushion is thinning. China is showing weak growth, iron ore prices are already trending lower, and the buffer that once absorbed copper volatility is fading just as copper becomes the dominant earnings line.

The result is leverage. When one cyclical commodity supplies more than half your earnings, a sustained price fall does not simply trim margins. It attacks the valuation multiple the market has assigned the stock.

Two prices anchor everything that follows. LME copper spot sat at approximately US$14,359 per tonne on 3 September 2026, and BHP’s own FY2026 production guidance runs at 1,800-2,000 kt. Any correction is measured down from a share price of roughly A$63.78 and a copper price near record territory.

Understanding that concentration is the prerequisite for reading every risk that comes next. You are not assessing a diversified miner. You are assessing a copper play.

What copper at US$14,000 per tonne is actually pricing in

The current spot price is not a fact about copper. It is an argument, and a contestable one.

Goldman Sachs forecasts an average copper price of US$11,400 per tonne for 2026, within a range of US$10,000 to US$13,000. Its projected path declines from around US$13,000 in Q1 2026 to roughly US$11,000 by year-end. Against a spot price of US$14,359, that is a meaningful step down.

Here is the gap laid out against the current market:

The forecast rests on arithmetic, not sentiment. Goldman projects the global copper market moving into surplus in 2026.

Goldman Sachs projects a global copper market surplus of approximately 300 kt for 2026, the supply-demand imbalance underpinning its forecast for lower prices.

The copper market surplus Goldman Sachs projects for 2026 is not a theoretical construct; it has physical backing in the form of two of the world’s largest mining operations ramping output simultaneously into a market where tariff-distorted inventory already sits at elevated levels.

This is not one analyst standing alone. Wood Mackenzie echoes the cautious view, warning of high price volatility and choppy markets driven by uncertain macroeconomic conditions. When two of the most-followed houses in the sector point the same direction, the consensus becomes hard to dismiss as noise.

If that surplus forecast is right, today’s spot price already embeds a premium the physical market does not yet support. Holding BHP at current levels is, in effect, a bet that the consensus is wrong.

That reframes everything that follows. The four catalysts below are not abstract worries. They are the specific mechanisms by which a surplus, and the price step-down that comes with it, could actually arrive.

The four catalysts that analysts say could trigger a reversal

Each catalyst carries a different timeline. Ranked from the most immediate and quantifiable to the most sentiment-driven, they give you a mental model of which threats could bite first.

1. Tariff inventory unwind (most immediate). Traders pulled refined copper into US warehouses to exploit a tariff premium, with COMEX inventories peaking at 675,185 tonnes after 46 consecutive days of inflows. In July 2025, a US exemption on refined copper collapsed that premium and triggered a roughly 20% price correction as over 600,000 tonnes unwound. A repeat or extension of this dynamic remains live.
2. Mine supply restoration (already in motion). Disrupted mines in Indonesia and the DRC are restoring output through 2026, adding fresh tonnes to a market already forecast to run a surplus.
3. Oil price and EV demand channel. A significant fall in oil toward roughly US$50 per barrel could push consumers back toward hybrids and away from fully electric vehicles, directly slowing the copper demand growth that the electrification story depends on.
4. AI and data centre reality check (most sentiment-driven). The genuinely AI-specific copper demand uplift is estimated by Kpler at just 100,000-200,000 tonnes, a fraction of what the bullish narratives imply.

The tariff dynamic has one more feature worth watching. Macquarie estimates it takes roughly nine months of normal consumption to absorb a tariff-induced inventory overhang, meaning a single unwind can weigh on prices for the better part of a year.

Mine supply coming back online in 2026

The supply side is where the surplus thesis gets its physical backing.

At Grasberg in Indonesia, operated by Freeport-McMoRan, production is in staged recovery following a 2025 landslide, with the main GBC mine scheduled to ramp up from Q2 2026. The 2026 target sits at roughly 1.0 billion pounds of copper and 0.9 million ounces of gold.

The 2025 supply disruptions at Grasberg and Kamoa-Kakula that briefly supported copper’s rally are now reversing, with both operations restoring and in some cases exceeding pre-disruption output rates, a dynamic that transforms what was a supply-side bullish catalyst into a bearish one.

At Kamoa-Kakula in the DRC, operated by Ivanhoe Mines, the complex delivered 388,838 tonnes in 2025 and is targeting approximately 600,000 tonnes for 2026. That is one of the fastest-growing large sources of new copper anywhere.

The Kamoa-Kakula step-up alone, an increase of more than 200,000 tonnes year on year, represents a substantial share of Goldman’s projected 300 kt surplus. Add Grasberg’s ramp-up on top, and the two operations together account for a meaningful portion of the oversupply analysts are modelling.

BHP is not a bystander here. Its own FY2026 guidance of 1,800-2,000 kt means the company will contribute to the very supply-side pressure that threatens the price side of its earnings.

For you as a shareholder, the actionable takeaway is timing. At least two of these four catalysts, the tariff unwind and mine supply restoration, are already underway. Neither requires a fresh macro shock to start pressing on prices.

The last time this happened, BHP lost two-thirds of its value

Extended commodity downturns are not a tail risk for BHP. They are a documented event, and the last one is worth studying closely.

BHP’s share price peaked at around A$49.55 in 2008. It then ground down to a low of approximately A$14.06 during FY2016, giving back the majority of its supercycle gains over roughly eight years.

BHP fell from a 2008 peak near A$49.55 to a FY2016 low of around A$14.06. It now trades near A$63.78, which puts the scale of previous peak-to-trough moves into perspective.

The timing detail matters. The 2000s commodity supercycle, during which the IMF commodity index rose approximately 317% before dropping around 50% in the global financial crisis, officially peaked around 2011. The drawdown from BHP’s share price high to its eventual trough was not a single bad year. It was a multi-year grind that tested investor patience and risk discipline.

The current setup rhymes with that period in three structural ways:

• Record copper prices, echoing the record commodity prices of the late supercycle
• A projected 2026 market surplus, mirroring the shift from tightness to oversupply that ended the last cycle
• Tariff-distorted inventories, a specific distortion that can unwind sharply once the trigger is pulled

Structural similarity is not a guarantee of the same outcome. But it defines the scenario your risk management should be built around.

The eight-year duration is the detail that should stay with you. It is not just that BHP fell, but that it stayed down long enough that “waiting for the recovery” demanded a holding period most retail investors never plan or budget for. Holding through a rally feels very different from holding through a decade-long grind.

What a copper price decline actually means for BHP shareholders

This is where risk identification turns into a decision you can actually make.

The recommended monitoring trigger is straightforward: a confirmed downturn in copper prices is the signal to reassess your BHP position. But your response depends on a choice you should make in advance, before the trigger fires.

Work through the framework in three steps:

1. Decide whether you are approaching BHP as a long-term investor or an active trader. This single decision determines your entire response when copper turns.
2. Identify your personal copper price monitoring trigger, the specific level or trend that tells you the cycle is rolling over.
3. Establish now what action you will take when that trigger fires, so you are not improvising after the price has already moved.

The asymmetry in the current position is the reason this matters. BHP at roughly A$63.78 reflects copper near US$14,000 per tonne. Goldman Sachs’s US$11,400 average for 2026 sits about 21% below current spot, an earnings reset the share price does not appear to fully discount.

At 51% of Group Underlying EBITDA from copper, a sustained price correction is not a margin event for BHP shareholders. It is a valuation event.

A 21% step-down in copper, given copper’s 51% EBITDA contribution, would not be a minor adjustment. It would likely constitute a significant re-rating of the stock. That is the outcome you want to decide about now, not after the fact.

BHP dividends and earnings outlook for 2026 are directly exposed to the copper price path because the company’s progressive dividend policy is funded from underlying earnings, meaning a sustained copper price correction does not just compress the share price but can reduce the income stream Australian shareholders often hold BHP for.

None of this requires a bear case on copper’s long-term story. Electrification, AI infrastructure, and emerging market development remain genuine multi-decade demand drivers. The risk mapped here is cyclical, not structural, and confusing the two could lead you to exit a long-term position for a short-term reason.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.

Watching the signals, not the sentiment

The value of everything above is that it converts vague caution into observable indicators you can track in real time.

Four signals do the work. Watch these, and a deterioration will show up before it becomes obvious in the share price:

• LME copper spot trend. Currently around US$14,359 per tonne; a sustained move toward Goldman’s US$11,000 year-end target would confirm the forecast is playing out.
• COMEX inventory levels. Peaked at 675,185 tonnes; a second large unwind would signal the tariff overhang is hitting the physical market again.
• Grasberg and Kamoa-Kakula production updates. Reported quarterly; faster-than-expected ramp-ups, particularly Kamoa-Kakula’s push toward 600,000 tonnes, would add supply into a surplus.
• Goldman Sachs and Wood Mackenzie forecast revisions. Any downward revision from either house would strengthen the consensus that a step-down is coming.

Keep Macquarie’s nine-month absorption estimate in mind as a duration guide. If a tariff unwind begins, the drag on prices could persist for most of a year, not fade in a quarter.

The structural case for copper over a decade remains intact. Electrification, AI infrastructure, and emerging market urbanisation are real. But the next twelve months present a specific set of conditions historically associated with cyclical corrections, and the appropriate response is active monitoring rather than passive holding.

Electrification demand for copper is the structural argument that makes the long-term case compelling even as the 2026 cyclical picture deteriorates; the key analytical discipline is separating what is a genuine decade-long demand driver from what has been priced in ahead of schedule by a market eager for a clean energy narrative.

The decision asymmetry is the whole point. If you watch the right signals, you can act before a correction is obvious in the price. Rely instead on BHP’s long-term narrative, and you could find yourself waiting eight years for a recovery, exactly as shareholders did last time.

Past performance does not guarantee future results. Financial projections are subject to market conditions and various risk factors, and forward-looking statements are speculative and subject to change based on market developments.