Copper Prices Fall to Five-Week Low

Copper prices fell to a five-week low as London Metal Exchange inventories continued building, according to Reuters' October 22, 2026 report, published at 09:57 UTC. The dated stock increase behind that pressure came on October 21: LME inventories rose 11,475 tonnes, according to Reuters' account of Wednesday's exchange data. For those of us holding copper producers, a sustained decline in the prices they receive would reduce revenue from the same volume of sales.

Reuters reported that total LME inventories had increased 8% over the week through October 21. More copper in exchange warehouses gives buyers a larger recorded pool of metal, although its location and availability for withdrawal still affect access. The LME's stock-reporting explanation, accessed October 22, distinguishes total stocks, deliveries and cancelled tonnage. We should keep those categories separate: metal delivered into a warehouse is an inflow, while the change in total stocks also reflects withdrawals. A warehouse build alone cannot establish how much new copper mines produced.

How does that reach the shares you own? The LME describes its Official Price, accessed October 22, as a benchmark used to index copper contracts. For Freeport-McMoRan, NYSE: FCX, its October 2 operating update expected third-quarter copper sales of approximately 750 million pounds. That gives us a recent measure of its sales exposure, rather than a forecast for the current quarter. October's price decline cannot explain revenue from the already completed third quarter; the forward risk is that weaker prices persist through subsequent sales and pricing periods.

Teck Resources, NYSE: TECK and TSX: TECK.B, showed the other side of that relationship in its July 22 second-quarter results. The company attributed stronger copper-segment earnings primarily to higher copper prices and production. If realized prices weaken, maintaining shipments would preserve sales volume while leaving less revenue per unit sold, all else equal. Teck also credited by-product revenue and cost performance for lower copper net cash unit costs, a non-GAAP measure. Those operating contributions can cushion a weaker copper price, but we need the next results to establish whether they continued.

The revenue link we outlined in Copper Prices Rise Amid Rate Optimism now gives us a downside condition to monitor. If exchange inventories keep rising and lower benchmark prices persist, we would reduce our expectations for copper receipts before assuming any corresponding relief in mining costs. If stocks begin falling and prices recover, that pressure could ease. For you, the useful comparison is the price each miner actually receives alongside its shipments and costs; a daily London quote cannot supply all three.

We will watch whether the LME stock build continues into October 27, when Freeport's October 2 update schedules its third-quarter results before the market opens, and check management's outlook for subsequent sales and costs.

Seek the truth and be prepared,

Equedia News

Sources

• Reuters, Copper falls to five-week low as LME inventory build continues, October 22, 2026, 09:57 UTC
• Reuters, Copper falls as inventories rise, supply worries ease, published October 22, 2026; reports October 21 exchange data
• London Metal Exchange, Stock movement report methodology, undated; accessed October 22, 2026
• London Metal Exchange, LME Copper benchmark information, undated; accessed October 22, 2026
• Freeport-McMoRan, Third-quarter operational update, October 2, 2026
• Teck Resources, Unaudited second-quarter results, July 22, 2026
• Equedia News, Copper Prices Rise Amid Rate Optimism, October 13, 2026

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