LONDON, May 15, 2026, 18:05 BST
- FTSE 100 just logged its steepest single-day drop in over eight weeks.
- UK borrowing costs shot higher, with investors weighing up both political noise and stubborn inflation risks.
- Hiscox jumps, shrugging off the broader selloff on news of a takeover approach.
London’s FTSE 100 sank 1.7% on Friday to finish at 10,195.37, marking its steepest daily decline in over eight weeks. UK shares, government bonds, and sterling all got hit as selling intensified. The more domestically focused FTSE 250 slipped 1%.
Timing is critical here. London is navigating a political shock right when energy prices are climbing and bonds are under pressure—a combination that’s quick to hit company funding, shake consumer confidence, and drag on how investors value UK assets.
The immediate catalyst: speculation that Greater Manchester Mayor Andy Burnham might re-enter Westminster and mount a challenge to Prime Minister Keir Starmer. After a Labour MP stepped aside, Burnham told Reuters he plans to pursue a parliamentary seat. Neil Wilson, investor strategist at Saxo UK, warned that markets are wary of the idea—a shift toward a more left-leaning Labour leader with a softer stance on fiscal policy won’t go down well.
Gilts took a heavy hit, with the 10-year yield jumping past 5.16%—marking its sharpest single-day surge since April 2025. Earlier, the benchmark yield touched heights not seen since July 2008. For reference, a basis point equals one hundredth of a percentage point.
Sterling slipped, too. Jefferies economist Mohit Kumar pointed out that investors worry Burnham “would be more left leaning,” raising concerns over even wider deficits. In the banking sector, shares of Barclays and Lloyds dropped over 2% early on—a move that showed pressure wasn’t just hitting bonds. Reuters
Oil prices piled on fresh pressure. Brent crude jumped over 3%, trading near $109 a barrel, after remarks from U.S. President Donald Trump and Iran’s foreign minister dimmed prospects for any deal halting the recent attacks and seizures in the Strait of Hormuz. “Market focus has shifted right back to the impasse and the risk of military flare-ups,” said Vandana Hari, founder of Vanda Insights. Reuters
This hits UK stocks—Britain’s an energy importer, so pricier oil stokes inflation and puts a pinch on households. It also complicates things for the Bank of England when it comes to lowering rates. At its April meeting, the Bank left the Bank Rate unchanged at 3.75%. One member pushed for a hike to 4%. Officials also flagged the Middle East conflict as a big question mark for where energy prices are headed.
On Thursday, Bank of England Chief Economist Huw Pill pushed the case for a “prompt but modest” rate hike, aiming to head off inflation pressure fueled by the Iran conflict before it becomes entrenched. Pill warned that holding off until the markets demand action would only complicate things for the central bank. Reuters
Traders aren’t betting on a quick rate cut from the Bank of England. Polymarket’s June contract gave “No change” an 84% probability, and another Polymarket contract for 2026 suggested a 64% chance the Bank hikes rates sometime this year. Over at Kalshi, the odds for a hold in June sat at 93%, with just a 7% chance priced in for a 25-basis-point cut. Polymarket Polymarket Kalshi
It wasn’t just London sliding. The pan-European STOXX 600 shed 1.5% by the close, and Germany’s DAX lost 2.1%. Energy prices top the list of Europe’s headaches, according to Michael Hewson, senior market analyst at iForex. Daniel von Ahlen of GlobalData TS Lombard pointed out that energy-importing, manufacturing-driven markets are taking the brunt.
FTSE 100 precious metal miners tumbled 7.7% as gold and silver prices lost ground. Utilities weren’t spared either, down 7.5%. With yields climbing, investors tend to exit utilities—their stable payouts start looking less appealing versus higher bond returns.
Hiscox shot up, surging as much as 15.3% after Insurance Post said Intact Financial of Canada was eyeing a possible offer. Hiscox wasn’t talking, and Intact didn’t get back to Reuters’ request for comment.
The selloff’s still got room to run in either direction. Burnham hitting a snag on his way back to Westminster, or signs of smoother traffic through Hormuz, could see some of the UK risk premium from Friday unwind. But if things go the other way—Capital Economics is flagging a worst-case: a major Iran conflict could push Brent crude above $150 a barrel and keep it hovering there into 2027. That would mean extended pressure on inflation, interest rates and gilts.
