The UK stock market has suffered a dramatic sell-off, wiping more than £150 billion from the value of Britain’s biggest companies in a week of heavy losses.
Investors rushed to pull money out of equities as escalating conflict in the Middle East drove oil prices sharply higher and pushed government borrowing costs up.
The FTSE 100 fell 1.24% on Friday, closing at 10,284.75. Over the full week, the index dropped 5.7%, marking its worst performance in nearly a year.
The last comparable fall came during the market turmoil triggered by Donald Trump and his so-called “Liberation Day” tariffs in April 2025.
The decline highlights growing anxiety across global markets as war risks threaten energy supplies and inflation concerns return to the forefront.
Why did the UK stock market fall so sharply this week?
The main trigger behind the UK stock market decline is the rapid escalation of conflict in the Gulf region, which investors fear could disrupt global oil production.
Energy traders reacted quickly, sending crude oil prices above $90 a barrel for the first time since April 2024. Prices briefly approached $95, representing a weekly jump of nearly 30%.
Higher oil prices tend to ripple through the entire economy. They increase transport costs, push up household bills, and often force central banks to keep interest rates higher for longer.
Investment strategist Lindsay James of Quilter warned that markets were responding to the risk of further supply disruption. “The concerns are understandable given recent attacks on Qatari facilities have already suspended production there,” she said.
Analysts say even a partial shutdown of Gulf energy infrastructure could cause a significant supply shock for global markets.
How much value has the FTSE 100 lost?
The drop in share prices across the FTSE 100 erased around £150 billion in market value in just five trading days.
Weekly FTSE 100 Performance
| Metric | Value |
|---|---|
| Weekly decline | 5.7% |
| Friday closing level | 10,284.75 |
| Market value lost | ~£150 billion |
| Last comparable drop | April 2025 tariff turmoil |
While global markets also fell, the UK market experienced sharper pressure due to its heavy exposure to energy prices and inflation-sensitive sectors.
European indices also slid during Friday trading:
| Index | Daily Decline |
|---|---|
| Germany’s DAX | -1.13% |
| France’s CAC 40 | -0.65% |
Why are UK borrowing costs rising at the same time?
Alongside falling share prices, the UK government bond market has also seen sharp movements.
The yield on 10-year gilts climbed from 4.23% to 4.73% in just one week, signalling that investors now demand higher returns to hold UK government debt.
Rising yields often indicate fears about inflation and public finances. According to market observers, Britain’s fiscal position makes it more vulnerable to energy-driven inflation shocks than many European economies.
Which companies have been hit the hardest?
Airline stocks have taken some of the steepest losses. Shares in International Airlines Group, the parent company of British Airways, fell 18.6% during the week.
Airlines have been forced to cancel or reroute flights across Middle Eastern airspace, increasing fuel costs and operational disruption.
The aviation sector is particularly sensitive to oil price spikes because jet fuel costs rise almost immediately when crude prices surge.
Could rising oil prices push the UK into recession?
Some economists believe the situation could become more serious if energy prices remain elevated for months.
Barry O’Dwyer, chief executive of Royal London, warned the crisis could damage the wider economy. “The escalation in the Middle East could push the UK economy into recession if energy prices remain elevated.”
Meanwhile, Saad al-Kaabi issued a stark warning about the potential global consequences. “The war risks driving oil prices to $150 per barrel and could bring down the economies of the world.”
Such levels would likely fuel inflation worldwide and delay expected interest rate cuts.
Why are investors also worried about the global economy?
Market sentiment worsened further after new US economic data showed signs of labour market weakness.
Figures revealed 92,000 jobs were lost last month, pushing unemployment up to 4.4%.
According to Chris Beauchamp, chief market analyst at IG Group, the timing could not be worse. “Quite possibly the worst situation that could have been imagined in a week when a new Middle East war lit a fire under oil prices.”
He added that surging energy costs during economic uncertainty could amplify market volatility.
