In a strong display of resilience, the FTSE 100 index reached an all-time high of 10,910.55 points on Friday, climbing 63.85 points or 0.6%. This remarkable achievement comes as investor confidence in UK equities grows, despite escalating geopolitical tensions between the United States and Iran, which have driven oil prices upward.
FTSE 100 Surges as Global Markets React
The FTSE 100’s performance outshone both its European and American counterparts, concluding a record-setting week with a notable increase. “As we move into 2026, it appears that the momentum in UK stocks could lead to another prosperous year for investors, provided these trends persist,” remarked Russ Mould, investment director at AJ Bell. Year-to-date, the index has surged by 9.6%, reflecting a robust recovery trajectory.
Meanwhile, the FTSE 250 and AIM All-Share indices also posted gains, closing at 23,757.15 (up 38.15 points) and 819.53 (up 4.30 points) respectively. The FTSE 100’s weekly performance was particularly strong, with a 1.1% rise, while the FTSE 250 and AIM All-Share saw minor increases of 0.2% and 0.9%, respectively.
Geopolitical Tensions and Economic Indicators
While London’s stock market flourished, Wall Street faced challenges, grappling with disappointing inflation data and rising geopolitical tensions. The Dow Jones Industrial Average fell by 1.0%, the S&P 500 dropped 0.6%, and the Nasdaq Composite declined 0.9%. The US Bureau of Labour Statistics revealed a 0.5% increase in the producer price index (PPI) for January, aligning with December’s figures, but showcasing a slowdown in annual growth to 2.9% from 3.0%.

The unexpected rise in core PPI, which increased by 0.8% on a month-on-month basis, raised concerns among investors. Barclays anticipates that the core personal consumption expenditures (PCE) inflation, a preferred metric by the Federal Reserve, rose by 0.4% month-on-month and 3.1% year-on-year in January.
Oil Prices Surge Amid Diplomatic Strain
In a related development, oil prices experienced a significant uptick, with Brent crude trading at $72.71 per barrel, an increase from $72.58 the previous day, and notably up from $70.00. The surge in prices is attributed to mounting tensions between the US and Iran, with Tehran asserting that the US must temper its demands to facilitate a potential agreement. This escalation in rhetoric follows a series of military build-ups by the US in the region, raising fears of conflict.
The geopolitical climate has had mixed effects on the stock market. While oil giants BP and Shell saw their shares rise by 0.7% and 1.6% respectively, airline stocks suffered; International Airlines Group (IAG), the parent company of British Airways, fell 7.4%, while easyJet dropped 2.6%.
Corporate Performance Highlights
On the corporate front, the London Stock Exchange Group (LSEG) rose 4.2% after positive reflections on its latest results, with analysts from Bank of America dismissing concerns regarding potential AI disruption to its operations. Rightmove’s shares climbed 4.3% after announcing a higher-than-expected total dividend for 2025, supporting investor confidence.

Conversely, Melrose Industries experienced a significant decline of 12% following its annual earnings report, leading some analysts to label the reaction as an overreaction. Meanwhile, Senior saw its shares soar by 20% after confirming the receipt of cash bids, indicating a potential shift in investor sentiment.
Why it Matters
The current dynamics within the FTSE 100 reflect not only the strength of the UK economy but also the intricate interplay between global geopolitical events and local market responses. As tensions between the US and Iran continue to unfold, their implications for oil prices and, consequently, the broader market will be critical to monitor. The resilience of UK stocks, coupled with positive corporate earnings and investor sentiment, suggests that the FTSE 100 may continue to thrive even amidst global uncertainties, making it an essential barometer for economic health and investor confidence.