Saudi Aramco is the largest oil company in the world, sits on the largest conventional reserves, and operates refineries in Saudi Arabia, China, South Korea, Japan and the United States. It has spent this year as the single most important supplier holding the global fuel market together. Brokers monitoring the Platts pricing window report that it has been bidding for diesel cargoes in the Mediterranean for several weeks, and traders say it has been seeking gasoline in Europe as well.

Companies buy replacement cargoes when their normal source is unavailable, which is the ordinary commercial explanation. What makes this case extraordinary is which sources have become unavailable and why. The damage has accumulated steadily and accelerated sharply. The Houthis said this week they attacked a refinery at Yanbu, having previously struck the Jazan processing plant repeatedly over the summer.

Europe’s renewed energy squeeze is becoming a test of economic resilience and political credibility. Low gas reserves and sharply higher transport fuel costs are exposing governments to several pressures at once: households face another deterioration in purchasing power, manufacturers confront rising operating expenses, and public finances limit the scope for relief.

The danger extends beyond an expensive winter. A prolonged shortage could weaken investment, complicate monetary policy and strengthen parties that argue Europe’s foreign policy commitments have become economically unaffordable.

The approaching Trump-Xi summit is likely to test whether the United States and China can exchange selective commercial concessions while preserving their broader strategic rivalry. Agricultural purchases offer Washington visible gains for farmers, energy trade creates opportunities to reopen disrupted business, and rare earth supplies give Beijing influence over critical American industries.

Sanctions add another negotiating instrument, linking bilateral commerce to US policy toward Iran and Russia. These issues create room for an agreement, although each operates through a different combination of political pressure and commercial incentives.