Global stock markets are plunging today as investors react to former US President Donald Trump’s threat to strike Iranian power plants, a dramatic escalation in a conflict that has already strangled the world’s most important oil shipping route. The wave of selling began in Asia and has swept across Europe, dragging major indices into correction territory and heightening fears of a prolonged energy shock that could derail economic growth and force central banks to keep interest rates higher for longer.
Markets in Panic Mode
In Asia-Pacific trading, Japan’s Nikkei 225 dropped 3.4%, China’s CSI 300 lost 2.8%, and South Korea’s KOSPI index slumped by a stark 6.5%. The panic quickly spread to Europe. The pan-European Stoxx 600 fell 1.7%, now more than 10% below its February high, meeting the definition of a market correction. In London, the FTSE 100 tumbled 1.5% to 9764 points, a more than 11% fall from its record high set on 27 February, just before the Iranian war began. The domestically-focused FTSE 250 fared worse, shedding almost 2.5%.
Almost every sector was hit. Precious metal miners Endeavour Mining and Fresnillo were among the biggest fallers on the FTSE 100, down 5% and 4.9% respectively, despite gold’s price itself falling to around $4,218 an ounce. Companies exposed to travel and global trade, such as Rolls-Royce and British Airways parent IAG, also saw sharp declines. The sell-off extended to commodities, with copper hitting a three-month low.
The Geopolitical Trigger: An “Escalation Trap”
The immediate catalyst is a 48-hour ultimatum issued by Donald Trump over the weekend, demanding Iran reopen the Strait of Hormuz or risk having its power generation facilities “obliterated.” That deadline expired on Monday evening New York time. Tehran has vowed continued resistance, threatening to “irreversibly destroy” essential infrastructure across the Middle East in response.
Analysts warn the conflict has entered a dangerous new phase. “This is an escalatory doom loop – or ‘escalation trap’ with currently no realistic off-ramp,” said Neil Wilson, investor strategist at Saxo UK. “Neither side has an incentive to back down as the costs of doing so are increasing day by day. Each side thinks pushing harder will will force the other to back down.”
The Strait of Hormuz is the critical chokepoint for global energy trade, and its disruption is now severe. In the week to 22 March, only 16 AIS-visible vessel crossings were recorded. Major shipping firms have suspended operations, tanker traffic has plummeted, and approximately 20% of the world’s daily oil supply, along with significant LNG volumes, is affected. This represents the largest such disruption since the 1970s energy crises.
Economic Impact: Inflation, Rates and Recession Risks
The immediate economic consequence is surging energy prices, which threaten to reignite inflationary pressures globally. Oil prices have already spiked, with Brent crude pushing toward $112 a barrel earlier in the conflict, and the Dutch front-month gas contract rose 3.7% to €61.45 per megawatt hour.
This has forced a brutal reassessment by investors and central banks. “Each day that the war goes on does more damage to the global economy and drives inflation higher, with recession chances rising by the hour,” said Chris Beauchamp, chief analyst at IG.
Markets are now betting aggressively that the Bank of England will be compelled to act, pricing in a full percentage point of interest rate increases by the end of December. That would take the Bank Rate to 4.75% from its current 3.75%. This shift comes despite the Monetary Policy Committee voting unanimously just last week to hold rates, warning that energy price volatility would delay inflation’s return to its 2% target. The MPC now expects Consumer Price Index inflation to rise to 3.5% in March, higher than previously forecast.
The anticipation of higher rates for longer has sent UK government borrowing costs soaring. The yield on 10-year gilts gained 7 basis points to hit 5.05%, its highest level since July 2008. Shorter-dated two-year gilt yields also jumped.
UK-Specific Fallout
For the UK economy, the combined shock of higher energy prices and borrowing costs is darkening the growth outlook. KPMG has revised down its UK GDP growth forecast for 2026 to 0.7%, citing the energy price shock, a cooling labour market, and weak household spending. Oxford Economics projects growth of just 0.4% for 2026, and predicts the Bank of England will hold interest rates at their current level for the rest of the year and “well into 2027,” with CPI inflation topping 4% in the second half of 2026.
Amid the turmoil, there are minor signs of defiance in the Gulf. Two Indian-flagged liquefied petroleum gas carriers, the Jag Vasant and Pine Gas, were tracked making a transit through the Strait of Hormuz close to the Iranian coastline, likely heading to address acute shortages in India.
On a technical note, the FTSE indices underwent a scheduled rebalance effective today, with IG Group Holdings and Lion Finance Group joining the FTSE 100, while Easyjet and Hikma Pharmaceuticals moved to the FTSE 250.
