Chile Copper Output Falls 15% in September

RT

Ask Rio Times

Latin American markets, currencies and companies.

Ask

Open the full Ask Rio Times →

RTAsk Rio TimesMarkets, currencies and the economy›

CHILE · ECONOMY

Chile, the world’s largest copper producer, mined 15.1% less copper in September 2026 than a year earlier, and the three months from July to September were its weakest quarter of 2026 so far. The figures come from the National Statistics Institute (INE), which published them on Friday 30 October 2026.

For US readers, the drop matters because copper goes into power lines, data centers, homes and electric vehicles, and Chile supplies a large share of the world’s metal. Less supply from the biggest producer can support prices, which feeds into costs for American manufacturers and builders.

What Happened

INE reported that Chile’s copper mines produced 387,870 tonnes of fine copper in September 2026, 15.1% less than in September 2025. That is also 5.0% more than in August, so the month was weak but not the lowest of the year.

The institute’s mining production index fell 8.7% from a year earlier, and its index for metal mining, which is mostly copper, fell 12.0%. This was the third monthly fall in a row, after drops of 7.2% in July and 11.7% in August.

The Quarter and the Year

Adding the INE monthly figures for July, August and September gives about 1.16 million tonnes, which is 12.4% below the same quarter of 2025 (about 1.33 million tonnes). That makes it the weakest quarter of 2026 so far.

From January to September, Chile produced 3.66 million tonnes, 8.6% less than a year earlier. The state copper commission, Cochilco, has projected 5.27 million tonnes for the full year, a fall of 2.6%, which would need a strong fourth quarter.

Why Output Fell

INE named a temporary suspension at one large company and lower ore grades at several mines. Lower grades mean the rock holds less copper, so miners must move more of it to produce the same amount of metal.

Escondida, the world’s largest copper mine, produced 252,600 tonnes in July to September, 19% less than in the previous quarter, as our report on Escondida shows. Its operator, the Australian miner BHP, blamed a lower grade, scheduled maintenance, bad weather and a fatal accident on 23 September that paused mining.

What Prediction Markets Say

Polymarket, a US-based prediction market, gives a 20.5% chance that copper cable is hit with US Section 232 tariffs, which are import duties imposed on national-security grounds, by 31 December 2026, and 49.5% by the end of 2027 (30 October, 3:27 p.m. ET). The market has traded about US$17,000, so it is thin.

Why we show this: prediction markets turn real-money bets into a live probability that moves within minutes of the news, which is why investors, campaigns and newsrooms in the United States now follow them closely. We show them next to polls and official results, never instead of them.

What It Means for You

If you hold copper miners or copper funds through US accounts, the Chilean shortfall is one reason supply stays tight, though prices also swing with the US dollar and with interest-rate hopes, as our copper market report shows. Weak Chilean output can also hurt Chile’s own growth, since mining is a large part of its economy.

US companies that buy copper wire, pipe or cable should watch two things: how fast Chile recovers and whether Washington adds new copper tariffs. Our look at copper and lithium on watch explains how a fall in AI stocks could change demand.

What Is Not Known

It is not known whether output will recover in the fourth quarter as Cochilco expects, since that would require about 537,000 tonnes a month against 388,000 tonnes in September. INE has not named the company behind the suspension.

It is also unclear how much of the fall is temporary, such as accidents and storms, and how much is lasting, such as ore grades that keep dropping. Copper prices for November will show how the market weighs those risks.

More: Chile news in English, every day from The Rio Times.

Frequently Asked Questions

How Much Copper Did Chile Produce in September 2026?

Chile produced 387,870 tonnes of fine copper, 15.1% less than in September 2025. The statistics office published the figure on Friday 30 October 2026.

Why Did Chile’s Copper Output Fall?

The statistics office pointed to a temporary suspension at a large company and lower ore grades. BHP also cited bad weather and a fatal accident at Escondida.

Does It Affect US Copper Prices?

Chile supplies a large share of the world’s copper, so lower output can tighten supply. Prices also depend on demand, the dollar and interest rates.

Sources: National Statistics Institute of Chile (INE), Mining Production Index, September 2026, published 30 October 2026; Chilean Copper Commission (Cochilco), 2026 output projection; BHP, quarterly operational review for Escondida, 20 October 2026; Polymarket, copper cable Section 232 tariff market, 30 October 2026.

Editorial responsibility: Matthias Camenzind, Editor-in-Chief · Editorial standards · Report an error