Copper prices saw a temporary increase of nearly 5% following the announcement that Indonesia’s Grasberg mine had declared force majeure due to an accident. This reflects concerns about supply vulnerabilities, exacerbated by declining treatment and refining charges at smelters, which pointed to material shortages.
According to the International Copper Study Group, mine production in the first seven months of the year has improved, with increases in Chile, Peru, and the Democratic Republic of Congo, though Indonesia’s output dropped by 32%. Global mine output rose by 3.4%, while metal production increased by 3.9% during the same period.
Despite growing demand, mainly from China, which consumes about 60% of global Copper, the increased supply has led to a surplus of 100,000 tons. This remains higher than last year’s surplus of 400,000 tons for the same period, keeping the market well-supplied but less so than previously.
The recent price spike in copper shows just how nervous the market is about supply. News of a single mine disruption in Indonesia, Grasberg, caused a significant jump, reflecting an underlying fear of shortages. This anxiety has been building for a while, especially as the low fees charged by smelters signal a scarcity of raw copper concentrate.
For traders, this creates a conflict between market sentiment and fundamental data. While the market is reacting to headlines, we see that global mine production is actually up 3.4% so far this year. This suggests the recent price rally might be an overreaction, presenting an opportunity for those who trust the broader production numbers.
China’s demand, accounting for 60% of the world’s copper, remains a key factor, and recent data supports a steady but not runaway growth story. China’s official manufacturing PMI for August 2025 was reported at 50.8, indicating continued expansion in the industrial sector. This solid demand is why the market is sensitive to supply news, but it doesn’t point to a deficit.
The supply picture is stronger than the Grasberg news implies, as increased output from major producers in Chile and Peru is more than offsetting the issues in Indonesia. Looking back, we saw similar supply concerns in early 2024 that caused price volatility before the market stabilized. The current global production figures suggest a similar pattern may be unfolding now.
This nervousness is visible in the derivatives market, where we’ve seen implied volatility on copper options climb significantly over the past two weeks. The surge in demand for short-dated call options indicates traders are betting on, or hedging against, further immediate price spikes. This presents a chance to sell volatility to those who believe the fundamental surplus will eventually weigh on prices.
Despite the supply fears, the global market still has a surplus of 100,000 tons so far in 2025. This buffer is smaller than the 400,000-ton surplus we saw at this time last year, which explains the market’s heightened sensitivity. Any disruption now has a bigger psychological impact because the safety net has shrunk.
Recent data from the London Metal Exchange (LME) shows copper inventories have drawn down by about 5% over the last month, which has fueled the bullish sentiment. However, these warehouse levels are still well above the lows seen during the supply crunch of 2022. This suggests that while inventories are tightening, there is not yet a physical squeeze to justify a sustained price panic.
