FTSE 100 Hits 10,000 for First Time as Iran War Shock Defied by UK Bluechips

The FTSE 100 crossed the historic milestone of 10,000 points for the first time in the index’s history during the Iran war period, reaching an intraday high of 10,934 as defence contractors, oil majors and commodity producers surged on geopolitical premium while the broader economic disruption weighed more heavily on the domestic-facing smaller companies outside the blue-chip index. The milestone, achieved during the war but subsequently retreating from its peak as the ceasefire calmed oil prices, marked the culmination of a multi-year rally that had seen the FTSE 100 outperform many other major global indices.
The FTSE 100’s composition explains why it was able to reach new heights even as the UK economy faced significant headwinds from the conflict. The index is dominated by genuinely global businesses — oil companies, mining groups, defence contractors, international banks and consumer goods multinationals — whose earnings are primarily generated outside the UK and whose valuations benefit from or are unaffected by the specific domestic economic consequences of geopolitical disruption. BP, Shell, BAE Systems, Rio Tinto and similar companies all registered significant gains during the conflict period.
Defence stocks were among the strongest performers. The Iran war, coming after years of elevated geopolitical anxiety about Russia’s threat to European security, catalysed a further round of NATO spending commitments that translate directly into long-term order books for defence equipment manufacturers. BAE Systems in particular reached new record valuations as the scale of the multi-year pipeline for naval vessels, armoured vehicles, munitions and advanced electronics became more visible.
The juxtaposition of a record-high stock market with a deteriorating economic outlook for ordinary households attracted significant political commentary, reinforcing arguments about the disconnect between financial market performance and the material experience of working people during periods of geopolitical crisis.
