Chinese oil refiners trimmed runs last month, reaching the weakest level in almost four years. The slowdown follows a plunge in crude imports that fell to an eight-year low after shipments from the Persian Gulf nearly stopped. With less feedstock, plants reduced throughput, tightening domestic fuel supplies and pressuring profit margins.

The import drop stems from geopolitical friction that disrupted Gulf cargoes, leaving China scrambling for alternative sources. Refineries responded by scaling back operations rather than stockpiling unfinished crude, a move that signals caution among traders watching inventory levels and price volatility. Analysts note the cut could ripple through related sectors, from logistics to petrochemicals.

Investors should watch how the output decline reshapes the domestic market balance. Lower refinery runs may lift spot gasoline and diesel prices, while exporters could see weaker demand for refined products abroad. The immediate effect is a tighter supply chain, prompting firms to reassess sourcing strategies and hedge exposure to volatile crude costs.