FTSE 100 Extends Losses as Oil Prices and French Unrest Pressure Markets

British equities faced renewed pressure as European political unrest, rising oil prices, and bond market volatility threatened to extend losses on the London Stock Exchange. The FTSE 100 closed 1.07% lower on Monday, October 19, 2026, as protests across several European countries weighed on regional markets, according to Yahoo Finance UK. City AM reported that the index was expected to continue falling on Tuesday as investors assessed developments in France and escalating conflicts in the Middle East and Eastern Europe.

French government bond yields climbed sharply following unrest in the country after the prime minister introduced a curfew to contain riots. The 10-year French government bond yield rose approximately 13 basis points to 4.9%, while the spread between French and German 10-year yields widened to its highest closing level since early 2012, according to City AM.

Oil prices also approached $110 per barrel as investors weighed escalating geopolitical conflicts against signs of strong energy flows from the Persian Gulf. The combination of political instability and energy market pressures added to concerns surrounding European financial markets.

In the UK housing market, property portal Rightmove reported that average asking prices for newly listed homes rose 1% month over month in October, following a 0.7% increase in September. However, prices remained 0.1% lower year over year, compared with an annual decline of 0.8% in the previous month.

Rightmove property expert Colleen Babcock said higher borrowing costs continued to affect buyers and sellers across Great Britain, while the forthcoming government Budget introduced additional uncertainty about interest rates and housing affordability.

"Higher mortgage rates are putting pressure on affordability across Great Britain, but sellers appear to be responding in different ways. Some have room to lower their expectations, while others need to hold firm on price to make their next move add up, even if that means waiting longer for a buyer," said Colleen Babcock, Rightmove's property expert.

Babcock also highlighted the potential effect of upcoming fiscal decisions on housing market participants. Buyers and sellers were awaiting greater clarity on how the Budget might affect them directly or indirectly.

"The forthcoming Budget adds some uncertainty too, with financial markets hoping that will improve the outlook for interest rates, while potential home-movers will be waiting to see how they are directly or indirectly affected," said Colleen Babcock, Rightmove's property expert.

Corporate developments added to the pressure on individual stocks. Barclays shares fell 3.26% on Monday after the Financial Times reported that the bank faced a Bank of England inquiry into allegations that traders understated risks associated with illiquid private credit loans.

The inquiry followed a complaint submitted to the central bank's Prudential Regulation Authority alleging that Barclays breached regulatory rules when classifying total return swaps linked to those loans. The allegations were reported by the Financial Times, citing people familiar with the matter.

Mining company South32 dropped 2.49% after reporting annual production declines in several commodities during its fiscal first quarter. The decreases included Brazilian alumina, payable silver and lead from Cannington, and gold from Sierra Gorda.

RBC Capital Markets said Cannington produced 59,000 metric tons of zinc-equivalent output, 18% below its consensus estimate and its own RBCe forecast of 73,000 metric tons. Production fell 27% quarter over quarter because temporarily reduced paste backfill availability delayed access to planned mining areas, lowering mined volumes and ore grades. South32 also processed lower-grade stockpiles to supplement mined ore.

South32 maintained its fiscal 2027 production guidance. Studies examining an extension of Cannington's mine life were expected to accompany the company's first-half fiscal 2027 results in February 2027, according to RBC Capital Markets.

Drugmaker GSK ended Monday's session down 0.39% after reporting positive results for its antibody-drug conjugate risvutatug rezetecan. The treatment demonstrated positive antitumor activity in the Embold PanTumour-101 trial involving patients with relapsed, extensive-stage small cell lung cancer.

Investors were also preparing for a series of UK economic releases during the week. Labor market data was scheduled for Tuesday, followed by inflation figures on Wednesday. The Confederation of British Industry's business optimism index and industrial trends orders were due Thursday, while consumer confidence, retail sales, and S&P Global purchasing managers' index data were scheduled for Friday.