European wholesale natural gas prices climbed to their highest levels since early 2023 as escalating tensions involving Iran intensified concerns over energy shipments through the Strait of Hormuz. Benchmark Dutch TTF gas futures moved above €75 per megawatt-hour, while British wholesale gas contracts also advanced to around 186 pence per therm as traders added a larger geopolitical risk premium to energy prices.

The sharp move reflects growing concern that continued military confrontation in the Middle East could disrupt liquefied natural gas shipments through one of the world's most important energy transit routes. The Strait of Hormuz is a critical route for global LNG exports, particularly shipments originating from Qatar, one of the world's largest suppliers of the fuel.

Any prolonged restriction on tanker traffic through the waterway could reduce the availability of LNG cargoes and force European importers to compete more aggressively with Asian buyers for supplies available from other regions. That risk is becoming increasingly important as Europe approaches the winter heating season and buyers seek to secure sufficient inventories. Although European gas storage levels remain relatively stable, the pace of replenishment has been slower than in previous years, increasing the market's sensitivity to potential supply disruptions.

The surge in natural gas prices is also feeding into broader concerns about inflation and interest rates across Europe. Higher energy costs can increase expenses for households and businesses while adding to inflationary pressures, potentially complicating the outlook for monetary policy. The impact has extended into sovereign bond markets, with Germany's benchmark 10-year Bund yield reaching multi-year highs as investors assess the possibility that another energy shock could keep inflation elevated for longer. With geopolitical tensions remaining high, European gas markets are likely to remain particularly sensitive to developments affecting shipping through the Persian Gulf and the availability of alternative LNG supplies.