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FTSE 100 falls to two-week low as Antofagasta cuts outlook - Finance news and analysis from Global Banking & Finance Review
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FTSE 100 falls to two-week low as Antofagasta cuts outlook

Published by Global Banking & Finance Review

Posted on August 13, 2026

3 min read

· Last updated: August 13, 2026

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FTSE 100 Drops for Fourth Day; Antofagasta Lowers Copper Output Forecast

Market Performance and Key Financial Developments

Aug 13 (Reuters) - London's FTSE 100 fell to a more than two-week low on Thursday after Antofagasta's downbeat copper production forecast sparked losses in the mining sector and offset any relief from stronger-than-expected economic growth in June.

The blue-chip FTSE 100 index closed 0.6% down at 10,772.67 points — dropping for a fourth consecutive day and touching its lowest since July 27. The mid-cap FTSE 250 climbed 0.1% to 24,837.71 points.

Economic Growth in Britain

• Britain's economy unexpectedly grew in June as companies enjoyed a respite from the energy price surge caused by the Iran war, the start of the men's soccer World Cup and hot weather, official data showed.

GDP Performance and Currency Reaction

• Gross domestic product rose by 0.3% in June, putting Britain on course for the strongest growth among the Group of Seven rich economies in the first half of 2026, after being flat in May. The pound, though, was largely unchanged against the dollar as the data did little to change near-term interest rate expectations.

Analyst Commentary

• "This is not a boom though, and quarterly growth has slowed from 0.6%, but Britain is proving significantly harder to knock off course than many feared," said Sam North, market analyst for eToro.

Mining Sector Impact

• Antofagasta shares fell 6.8% after the company cut its 2026 copper output forecast due to a shutdown at its Los Pelambres mine in July. Shares of other miners Rio Tinto and Anglo American dropped 4.8% and 3.5%, respectively.

Performance of Metal Miners

• The FTSE 350 indexes of industrial metal miners and precious metal miners fell more than 3% each as metal prices lost steam against a firmer dollar. [GOL/] [MET/L]

Global Factors and Market Sentiment

• A tame U.S. inflation reading on Wednesday dented expectations of an interest rate hike from the Federal Reserve next month. Yet, a lack of progress to permanently end the Middle East conflict kept oil prices from further decline amid investors' assessments of prospects for weaker global demand and higher U.S. crude stocks. [O/R]

Mid-Cap Stock Highlights

• Among mid-cap stocks, Costain gained 4.6% after the infrastructure solutions firm issued upbeat half-yearly results.

• British property firm Savills surged 10.9% as it posted a 47% rise in half-year underlying profit, strengthened by an improvement in its North American and transactional businesses.

Reporting Credits

(Reporting by Anand Gopal and Sruthi Shankar in Bengaluru; Editing by Maju Samuel and Andrea Ricci )

Key Takeaways

  • Antofagasta shares dropped ~6.8% after cutting its 2026 copper production outlook due to a shutdown at Los Pelambres, dragging down miners like Rio Tinto (~4.8%) and Anglo American (~3.5%)
  • UK GDP rose unexpectedly by 0.3% in June, the strongest among G7 economies so far in H1 2026, but gains were muted by moderating quarterly momentum
  • Mid‑caps offered some respite: Costain jumped ~4.6% on upbeat interim results, and Savills surged ~10.9% on strong profit growth

Frequently Asked Questions

Why did the FTSE 100 fall to a two-week low?
The FTSE 100 fell after Antofagasta cut its copper production forecast, sparking losses in the mining sector despite strong UK economic growth data.
How did Antofagasta's outlook impact mining stocks?
Antofagasta shares dropped 6.8% after cutting its 2026 copper output forecast, leading to declines in other miners like Rio Tinto and Anglo American.
What was the performance of the UK economy in June?
UK gross domestic product grew by 0.3% in June, positioning Britain for the strongest growth among G7 economies in the first half of 2026.
How did FTSE 250 and other sectors perform?
The FTSE 250 rose 0.1%. Industrial and precious metal miners' indexes both fell over 3%, while Costain and Savills posted notable mid-cap gains.
Did the stronger economic data affect the pound?
Despite the positive economic growth, the pound remained largely unchanged against the dollar as rate expectations stayed steady.

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