The FTSE 100, London's benchmark index, has continued its strong performance into 2026, gaining around 5.3% year-to-date and outpacing all three major Wall Street averages, building on its impressive 21.5% surge in 2025 [1]. This outperformance is attributed to the index's composition, which includes significant exposure to resilient sectors such as energy, mining, utilities, industrials, healthcare, and consumer staples, providing defensive ballast amid ongoing geopolitical risks [1]. Analysts highlight the FTSE 100's attractive cash returns, with approximately £180 billion returned to investors in 2025 through dividends, buybacks, and takeovers, and forecasts for 2026 already at around £130 billion, or 4.6% of total market cap, surpassing the Bank of England base rate and inflation [1].
However, the ongoing war in Iran is casting a shadow over this winning streak. The conflict has led to the closure of the Strait of Hormuz, a critical chokepoint for global energy shipments, with President Donald Trump ordering the U.S. Navy to take aggressive action against any threats in the area [2]. Oil markets remain volatile, with Brent crude rising 0.41% to $105.5 per barrel and U.S. West Texas Intermediate futures up 0.08% to $95.93 [2]. Fatih Birol, head of the International Energy Agency, described the situation as the "biggest energy security threat in history" [2].
Despite the truce extension between Israel and Lebanon, which was announced by President Trump and provides a temporary reprieve, market sentiment remains cautious due to the ongoing energy crisis and the economic fallout in Iran, whose economy is described as being in freefall [2]. European benchmarks opened lower, capping a downbeat week, while U.S. futures were mixed [2].
Analysts note that the FTSE 100's defensive characteristics and high cash yields make it an attractive hedge against current geopolitical risks, especially as oil and gold prices remain elevated and some industrial metals reach new peaks [1]. However, longstanding issues such as shallow local capital pools and the potential for further geopolitical escalation continue to pose risks to the London market's outperformance [1].
CONCLUSION
The FTSE 100's strong performance and defensive sector exposure have made it a standout in 2026, but the Iran war and resulting energy turmoil present significant risks. While high cash returns and sector resilience offer some protection, ongoing geopolitical uncertainty and market volatility could threaten the index's winning streak.