The brief illusion of stability in the Middle East has shattered. US and Iranian forces exchanged strikes overnight, tearing up the fragile ceasefire that had barely held for a fortnight. London’s response was predictably Churchillian: an emergency UN session, calls for restraint, and the usual diplomatic hand-wringing. But for those of us watching the numbers, the real story is in the yield curve and the barrel price.
Brent crude spiked above $98 a barrel before settling at $94.60, a 5.2% jump that will feed straight into next month’s CPI print. The market is pricing in a 15% risk premium for Strait of Hormuz disruption, and for once the hawks might be right. Iran’s Revolutionary Guard has shown it can reach Israeli ports, and the US Fifth Fleet is now on high alert. Any actual blockade would send oil to $120, and with it inflation expectations through the roof.
Gilts took a pounding. The 10-year yield rose 12 basis points to 4.38%, as investors dumped risk assets and scrambled for dollars. Sterling fell 1.1% against the greenback, its worst day in three months. This is classic capital flight. Foreigners hold roughly 25% of UK gilts, and when geopolitics turns sour, they sell first and ask questions later. The Bank of England will be watching the currency slide nervously, but raising rates now would only crush the housing market. They’re trapped.
Let’s be clear: this crisis is a gift to fiscal doves. Expect Chancellor Reeves to announce a ‘defence spending boost’ within days, funded by more borrowing. The Treasury will claim it’s temporary. It never is. Debt-to-GDP has already ballooned to 97% since 2020, and another war premium will push us past 100% faster than you can say ‘Truss’. The only question is whether the bond vigilantes will punish UK debt before or after the election. My money is on before.
On the equities front, FTSE 100 energy stocks rallied 3%, but everything else fell. Aerospace and defence names like BAE Systems gained 2.5% on hopes of new contracts, but retailers and airlines were hammered. EasyJet dropped 6% on fuel cost worries. The classic win-lose of wartime capitalism.
What happens next? If Iran closes the Strait of Hormuz, we’re looking at 1973-style oil shocks. If it’s a limited exchange, markets will recover in weeks. But the damage to investor confidence is lasting. The US dollar will strengthen, emerging markets will bleed, and British savers will feel the pinch at the petrol pump. Jeremy Hunt should be dusting off his emergency budget plans.
One final thought. The UN session is a sideshow. The only negotiation that matters is between Washington and Tehran, and neither is in a deal-making mood. For investors, the bottom line is this: hedge your oil exposure, shorten your bond duration, and pray the Strait stays open. In the City, we call that a ‘prudent’ response. In Downing Street, they call it a crisis. Same thing, different language.
