Why Is the UK Stock Market Down Today? FTSE 100 Slips 0.3%, FTSE 350 Under Pressure as Mining Stocks Slide Amid Geopolitical Uncertainty

The FTSE 100 fell around 0.3% today as a sharp sell-off in mining stocks outweighed stronger UK GDP data and kept the London market under pressure.

By: Nisha Srivastava
Last Updated: August 13, 2026 15:11:29 IST

UK Stock Market Today (August 13):  The United Kingdom’s stock market is under pressure on Thursday, August 13, 2026, as the benchmark FTSE 100 Index drops by 0.31%, down at 10,799.16 points. This decline has been experienced despite gains in several other European share markets as a result of heavy selling in the mining companies that dominate the London share market. This has overshadowed the positive performance in the UK economy in June.

London Stock Exchange FTSE 100 Opens Down Today

FTSE 100 index of London Stock Exchange started off positively but reversed course in early trading on August 13, 2026, falling by 0.26% to a level of about 10,805.17. Despite starting positively because of an unexpected 0.4% GDP growth in the UK for Q2, the blue chip index lagged behind due to heavy trading in the commodities market.

FTSE 100 Market Snapshot

As of mid-day trading on Thursday, August 13, 2026, the FTSE 100 Index is trading down slightly at 10,805.21 points, representing a decline of roughly 0.26%.

  • Opening Price: 10,833.58
  • Daily High: 10,837.02
  • Daily Low: 10,779.23
  • Previous Close: 10,833.15

UK Stock Market Today (August 13): Major FTSE Indices Market Performance

  • FTSE 100: The index stood at 10,806.24, down 26.91 points, or 0.25%. It touched a high of 10,837.02 and a low of 10,779.23, compared with the previous close of 10,833.15.
  • FTSE 250: The index rose 22.41 points, or 0.09%, to 24,837.29. It recorded a high of 24,883.28 and a low of 24,777.51, against the previous close of 24,814.88.
  • FTSE 350: The index declined 12.48 points, or 0.21%, to 5,895.13. Its intraday high was 5,910.55, while the low stood at 5,880.61. The previous close was 5,907.61.
  • FTSE All-Share: The index fell 12.04 points, or 0.21%, to 5,831.06. It moved between a high of 5,846.04 and a low of 5,816.87, compared with the previous close of 5,843.10.
  • FTSE AIM UK 50: The index gained 12.90 points, or 0.30%, to 4,323.80. It reached a high of 4,323.97 and a low of 4,302.66, while the previous close was 4,310.90.
  • FTSE AIM 100: The index dropped 12.97 points, or 0.34%, to 3,747.15. It hit a high of 3,761.83 and a low of 3,738.62, against the previous close of 3,760.12.
  • FTSE AIM All-Share: The index slipped 2.29 points, or 0.28%, to 801.64. Its high was 804.21 and low was 800.04, compared with the previous close of 803.93.

Why Is the UK Stock Market Down Today? (August 13, 2026)

FTSE 100 is trading lower on Thursday, August 13, 2026, amidst better-than-anticipated UK economic data. While FTSE 100 was trading lower by about 0.3%, the wider European markets were up by slight margins. The reason for the fall has been attributed to the steep fall in basic resources and mining companies.

Mining Stocks Lead the Decline

The biggest weight to the FTSE 100 is put by the basic resources industry, which lost roughly 2.9 percent following the weakening of metal prices. The mining stocks carry considerable weight in the UK stock market index; thus, a fall in the industry may have a disproportionately large effect on the index. Among the mining stocks that fell were those of Antofagasta, which cut back its annual production forecast. Others were Rio Tinto, Fresnillo and Anglo American.

Strong UK GDP Data Fails to Lift the FTSE 100

Despite the favorable domestic economic numbers, the market remains weak. The UK economy saw growth by 0.4% during the second quarter of 2026, in addition to an unexpected growth during June.  Nevertheless, the good numbers of GDP failed to offset the selling pressure seen in mining and other heavy weight stocks. According to Reuters, the FTSE 100 dropped by approximately 0.3% despite the unexpected economic growth.

Geopolitical Uncertainty Keeps Investors Cautious

Another area of uncertainty that the investors are watching is the Middle East, as well as the US-Iran talks. Peace talks that have stalled and possible disruptions in the use of this important route are causing investors to worry.

Oil Prices and Energy Risks Remain in Focus

Oil prices dropped on Thursday, which brought some comfort to European markets. Nevertheless, the geopolitical risks associated with the supply of energy resources are still a key consideration for the market. The drop in oil prices alleviated the geopolitical risks in Europe, but the FTSE 100 index still lagged behind owing to the sharp declines in basic-resource companies’ stocks.

Why Is the FTSE 100 Down Today?

In short, the FTSE 100’s decline is mainly being driven by weakness in mining and basic-resources shares, rather than a deterioration in the latest UK GDP figures. Stronger-than-expected economic growth has provided some support, but falling metals prices, losses among major miners and geopolitical uncertainty have kept London’s benchmark under pressure.

UK Stock Market Down Today: What Should Investors Watch Next?

  • Inflation and wage figures from the UK.
  • Any new information provided by the Bank of England.
  • Earnings reports from FTSE-listed firms.
  • Fluctuations in oil, copper, and gold prices.
  • Yields on global bonds and US markets performance.
  • Geopolitical events influencing investors’ sentiment.

Disclaimer: The information provided in this article is for informational purposes only and does not constitute financial advice. The Sunday Guardian suggests that readers consult with a certified financial advisor before making any investment or money-related decisions. The stock market involves significant risk.

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