Finance

FTSE 100 falls as Rio Tinto results disappoint, US-Iran tensions weigh

Published by Global Banking & Finance Review

Posted on February 19, 2026

2 min read

· Last updated: April 3, 2026

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FTSE 100 falls as Rio Tinto results disappoint, US-Iran tensions weigh
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Feb 19 (Reuters) - London's FTSE 100 dipped from record highs on Thursday, weighed down by Rio Tinto after the global miner missed expectations for annual earnings, while simmering U.S. and Iran

FTSE 100 Declines Amid Rio Tinto Earnings and US-Iran Tensions

By Tharuniyaa Lakshmi

Feb 19 (Reuters) - London's FTSE 100 dipped from record highs on Thursday as Rio Tinto's shares fell after the global miner's annual earnings missed expectations, while simmering U.S.-Iran tensions kept investors cautious.

FTSE 100 and Market Performance

The blue-chip index fell 0.5% after closing at a record high for two straight sessions. The domestically focused mid-cap FTSE 250 was down 0.4%.

Rio Tinto fell 3.6% after the miner reported flat annual earnings as lower prices at its mainstay iron ore business were offset by a strong performance in its copper division.

Other London-listed miners also fell after copper prices were hit by a firmer dollar, rising inventories and reduced demand because of the Lunar New Year holiday in China, the world's biggest metals consumer. [MET/L]

Impact of US-Iran Tensions on Global Markets

"A stronger US dollar - at one-month highs amid flight-to-safety flows - added pressure on precious and base metals, weighing on UK mining stocks, putting a dent in the FTSE 100's stellar performance," said Axel Rudolph, senior financial analyst at IG.

Investors around the globe have been unnerved by U.S.-Iran tensions over Tehran's nuclear program, with oil prices rising by more than 2%. [O/R]

UK stocks have been finding broad support from upbeat corporate earnings, expectations of monetary policy easing as well as inflows from investors looking to diversify away from U.S. stocks that have been pressured by AI-disruption concerns. 

Centrica's Decline and Market Reactions

On Thursday, British Gas owner Centrica was down 5.1%, the biggest faller on the blue-chip index, after warning that 2026 profit at its energy trading arm would miss forecasts and pausing its share buyback programme after reporting a 39% drop in annual profit. 

(Reporting by Tharuniyaa Lakshmi in Bengaluru; Editing by Mrigank Dhaniwala, Kirsten Donovan)

Key Takeaways

  • London’s FTSE 100 pulled back from record highs as risk appetite softened following two strong sessions. (lse.co.uk)
  • Rio Tinto shares fell after reporting flat annual earnings that missed expectations, with weaker iron ore partly offset by stronger copper. (investing.com)
  • Geopolitical nerves rose as U.S.–Iran tensions persisted despite recent Geneva talks showing limited progress, weighing on sentiment. (rferl.org)
  • London Stock Exchange Group edged higher on reports that activist Elliott is pushing for strategic changes and a fresh, sizable buyback. (investing.com)
  • Centrica dropped after pausing share buybacks and signaling its 2026 trading/optimisation profits would undershoot guidance. (investing.com)

References

Frequently Asked Questions

What is the main topic?
The article covers the FTSE 100 slipping from record highs, led by a decline in Rio Tinto after earnings missed expectations, alongside risk-off sentiment from ongoing U.S.–Iran tensions. ([investing.com](https://www.investing.com/news/stock-market-news/rio-tinto-annual-earnings-flat-as-iron-ore-weakens-copper-cushions-blow-4512835?utm_source=openai))
Why did Rio Tinto weigh on the FTSE 100?
Rio Tinto posted flat annual earnings below consensus as weaker iron ore prices offset stronger copper, prompting a share drop that pressured the index. ([investing.com](https://www.investing.com/news/stock-market-news/rio-tinto-annual-earnings-flat-as-iron-ore-weakens-copper-cushions-blow-4512835?utm_source=openai))
What moved LSEG and Centrica?
LSEG rose on reports of activist pressure from Elliott for strategic changes and a new buyback, while Centrica fell after pausing its buyback and cautioning on 2026 trading profits. ([investing.com](https://www.investing.com/news/stock-market-news/elliott-management-builds-stake-in-london-stock-exchange-group-ft-reports-4498769?utm_source=openai))

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