Copper Fund Slips 0.9% as Centinela Strike Begins | Copper, Oct 8
Key Facts
- The copper fund CPER fell 0.88% to US$39.46 on Thursday 8 October, while Southern Copper fell 0.95% to US$198.66 and Freeport-McMoRan 1.00% to US$71.14 (RT).
- A strike began on Wednesday 7 October at Antofagasta’s Centinela mine in Chile, involving 709 workers, about 22% of its own workforce; the company says its 2026 production outlook is unchanged (Shanghai Metals Market).
- Three-month copper on the London Metal Exchange rose 0.96% to US$14,614.5 a tonne, about 2% below the record of US$14,875 set on 10 September.
- Chinese buyers returned from the National Day holiday and began restocking into tight inventories, which supported the metal.
- Prediction markets: Polymarket gives 39.5% to US Section 232 tariffs on copper cable by end-2026 (US$16,000 traded, as of 8:23 pm ET, 8 October). Bets, not forecasts.
Today’s Focus
Copper held near record levels on Thursday 8 October. The London benchmark rose 0.96% to US$14,614.5 a tonne, even as the US copper fund CPER fell 0.88%.
A strike began on Wednesday at Centinela, a large copper mine in northern Chile owned by Antofagasta. Two unions with 709 workers walked out after government-led mediation failed. The mine produced 240,400 tonnes of copper in 2025.
Chinese factories also came back from a week-long holiday and began restocking.
What matters today. A strike in Chile and Chinese restocking support the price, but Antofagasta says its output plan is unchanged, so the effect depends on how long the stoppage lasts.
01 The session in one read
Three-month copper on the London Metal Exchange (LME) rose 0.96% to US$14,614.5 per metric ton on Thursday 8 October. The record is US$14,875, set on 10 September.
On Wall Street, the picture was softer. The CPER fund, which tracks copper futures and not the physical metal, fell 0.88% to US$39.46. Southern Copper lost 0.95% and Freeport-McMoRan 1.00%.
Chile produced about 5.3 million metric tons of copper in 2025, roughly 23% of world mine output, and Peru about 2.7 million, just under 12%.
The strike at Centinela and China’s post-holiday return give copper a firm near-term tone. Producer shares fell, which suggests investors are not yet convinced the rally will last.
Antofagasta says its 2026 output outlook is unchanged, and the unions warn that the effect on supply could show up by November. We cannot say from one session how long the strike or Chinese buying will last.
02 The board
| Asset | Level | Change |
|---|---|---|
| Copper (CPER fund) | US$39.46 | -0.88% |
| Southern Copper | US$198.66 | -0.95% |
| Freeport-McMoRan | US$71.14 | -1.00% |
Source: RT close, 2026-10-08. The LME price is from market reports.
The CPER fund follows futures, so it can move against the LME price on a given day. The RT calendar listed no China release for 8 October. Rio Times · Live Market Intelligence
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IBOV
206,220.24
+0.94%
+21.85%
204,302.33
168,310
167,142
—
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11,024.22
+0.22%
—
10,999.64
11,210
10,984
1,513,213,483
IPC MEX
64,851.89
+0.31%
+12.17%
64,653.33
66,121
65,405
108,886,187
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2,832,472
+0.30%
+30.51%
3,022,485
3,042,365
2,991,150
—
COLCAP
2,525.90
-0.36%
—
9.04
9.05
9.02
4,133
BVL PERÚ
60,766.81
-1.71%
—
—
—
—
—
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5.16
+0.01%
-5.13%
5.16
5.18
5.14
—
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5.95
+1.01%
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5.89
5.98
5.94
—
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17.06
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-8.58%
17.10
17.08
17.01
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913.98
+0.04%
-5.67%
913.65
915.11
906.68
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3,140
+0.03%
-22.04%
3,139
3,141
3,105
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3.36
-0.66%
-4.82%
3.38
3.38
3.35
—
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1,493
+0.10%
+12.96%
1,491
1,494
1,480
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40.27
+1.24%
+1.80%
39.77
40.27
40.23
—
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5,939
+1.68%
-19.54%
5,841
5,939
5,925
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11.64
-0.76%
+72.04%
11.73
11.72
11.64
—
USD/DOP
58.34
+1.25%
-3.44%
57.62
58.34
58.04
—
USD/CRC
445.92
+0.89%
-9.71%
441.97
448.50
445.92
—
03 What moved it
The Centinela stoppage lifted supply worries. The Minera Esperanza and Distrito Centinela unions had voted 98.73% for a strike on 28 September. Mandatory mediation ended on 6 October without a deal, and a legal strike began on 7 October after workers rejected the company’s offer.
China’s refined-copper demand is tied to power grids, electric vehicles and renewable energy equipment, all of which need copper. With Chinese buyers back from the holiday and inventories tight, the market had a demand trigger.
04 The Latin American read
Chile is the world’s largest copper miner, and Peru is second. A stoppage at one large mine can move global prices within days.
Peru is home to Southern Copper and to large Freeport-McMoRan operations. Both stocks eased on Thursday, even as the LME price rose.
05 The names to watch
Antofagasta, the London-listed owner of Centinela, is the first name to follow, because the strike’s length will help set near-term pricing.
Chile’s state-owned Codelco, Escondida and Collahuasi remain central to any wider supply story, though none reported disruption on Thursday.
06 The outlook
The tone depends on how long the Centinela strike lasts and whether Chinese restocking continues. If both persist, copper could retest the record of US$14,875 set on 10 September.
A quick settlement would remove much of the urgency.
What Prediction Markets Say
Polymarket’s market on whether US Section 232 tariffs will hit copper cable priced December 31, 2026 at 39.5% and December 31, 2027 at 41.0%, with US$16,000 traded (read at 8:23 pm ET on 8 October). Kalshi, a US exchange regulated by the CFTC (the US commodities regulator), priced restrictions before 1 January 2027 at 19.0%.
These are bets on a US trade decision, not forecasts of the copper price.
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.
07 What to watch
- Centinela talks: A deal between the unions and Antofagasta would end the stoppage; a long strike would add to tight supply from Chile.
- China restocking: The pace of refined-copper buying shows whether demand is strong or merely catching up.
- LME inventories: Low exchange stocks magnify every supply disruption.
- Producer shares: Southern Copper and Freeport lagging the LME price may signal doubt about the rally.
Frequently Asked Questions
Why did copper rise on 8 October 2026?
Three-month LME copper rose 0.96% to US$14,614.5 as Chinese buyers returned from the National Day holiday and a strike at Centinela in Chile raised supply concerns.
Has the Centinela strike started?
Yes. Two unions with 709 workers began a legal strike on 7 October after mediation failed. Antofagasta says its 2026 production outlook is unchanged.
What is CPER?
CPER is an exchange-traded fund that tracks copper futures, not the spot price of physical copper, so it can diverge from the LME price on a given day.
Why does Chile matter so much for copper?
Chile is the world’s largest copper miner, producing about 5.3 million metric tons in 2025, roughly 23% of world mine output.
Market data: RT; LME price and strike: market reports, Shanghai Metals Market, Chilean press; prediction markets: Polymarket, Kalshi (as of 8:23 pm ET, 8 October 2026)
This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief
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