Global Bunker Prices Extend Rally as Geopolitical Risk and Hub Tightness Drive Fourth Day of Gains

Bunker fuel buyers across the globe faced a fourth consecutive session of rising prices on July 23, as MABUX's World Bunker Index extended its upward trajectory on the back of escalating Middle East geopolitical risk premiums. The composite index showed synchronized gains across all three major marine fuel grades, with VLSFO rising $23.04/mt to $814.54/mt, 380 HSFO gaining $14.82/mt to $664.92/mt, and MGO surging $29.34/mt to $1,309.82/mt. The spread between the cheapest and most expensive conventional bunker fuel — HSFO vs MGO — has widened to nearly $645/mt, a level that fundamentally alters voyage cost economics for operators who cannot choose their fuel grade. Grades that are in the same cost bracket at $200/mt apart are in a completely different cost regime at $645/mt apart.

The tightest conditions in the global bunker market are concentrated East of Suez, according to ENGINE's fuel availability outlook published July 22. Singapore, the world's largest bunkering hub by volume, is seeing tight availability across all grades. VLSFO inventories are low — the lower stock levels are explicitly described by ENGINE as "lending support to the benchmark price" — and HSFO availability remains similarly constrained. Recommended lead times have widened to 9-13 days for HSFO and 9-11 days for LSMGO, both up from the prior week. In Malaysia's Port Klang, availability remains tight across all grades. These are not theoretical constraints: ships calling at the world's busiest bunkering port are facing week-plus delays to top up, which cascades into scheduling disruptions across the Asia-Pacific shipping network.

The China bunker market tells a similar story, with important regional variation. In Zhoushan, the largest Chinese bunkering hub, VLSFO availability has tightened despite softer demand, with recommended lead times extending to roughly 12 days from about 8 days previously. A local source cited by ENGINE attributed the longer waiting times to limited refinery supply — refineries are not producing enough VLSFO-grade fuel to meet prompt demand even when that demand is below normal. Lead times for LSMGO and HSFO have also lengthened to around seven days from about five days last week. Compounding the supply constraint, bunkering operations at Zhoushan's outer Tiaozhoumen and Xiazhimen anchorages have remained suspended since July 7 due to adverse weather — now 17 days and counting. Across northern China, the picture is mixed: Dalian and Qingdao have ample VLSFO and LSMGO but HSFO availability in Qingdao is limited, while Tianjin faces broader constraints and Shanghai reports tight VLSFO and HSFO supply.

The Suez Canal corridor adds another layer of pressure. At Port Suez in Egypt, HSFO inventories are tight and VLSFO stocks are close to depletion, per ENGINE's assessment. Further south, all major grades remain limited in Djibouti. For ships transiting the Red Sea-Suez route — already under threat from Houthi attacks — this means the two main bunkering stops near the chokepoint both have limited fuel availability, compounding the risk of disruption. In the Americas, conditions are more balanced but with localized constraints. On the US East Coast, strong bunker demand in New York is being met with 3-5 day lead times for VLSFO and LSMGO, though HSFO requires up to 8 days. Houston reports good demand with decent availability at 5-7 days across all grades. Brazil presents an evolving structural story: HSFO is no longer available at all, and Petrobras' scheduled maintenance at its Itaqui terminal is temporarily suspending VLSFO and MGO sales, creating a localized pinch point in South America.

The scrubber spread — the price premium of VLSFO over HSFO that determines the economic case for scrubber-equipped vessels — has widened dramatically in July. MABUX data shows the global scrubber spread running near $150/mt, compared to an average of $65.60/mt in the first 11 months of 2025, per S&P Global's Platts Bunkerworld indices. That is well above the psychological $100/mt threshold that typically drives scrubber investment payback calculations, and it reflects the extreme upward pressure on low-sulfur fuels from both crude costs and regulatory demand. The IMO 2020 sulfur cap continues to force the majority of the global fleet — 43.2% of the global bunker market by volume, per IMARC Group data — to burn VLSFO or MGO, while only the approximately 5,000 scrubber-equipped vessels worldwide can burn cheaper HSFO. The new Mediterranean Emission Control Area, which took effect in 2025 requiring maximum 0.10% sulfur, has further complicated the demand picture. VLSFO's share of the Med ECA bunker mix dropped from 60% in December 2024 to 35.6% by June 2025, while LSMGO demand more than doubled from 13% to 30% of the mix, and ultra low sulfur fuel oil (0.1%) rose from 0.3% to 4.1%, according to Global Maritime Hub's analysis.

The regulatory environment is adding a structural cost floor that will persist regardless of where crude prices go. From July 2026, the EU Emissions Trading System applies full (100%) cost to marine fuel emissions, adding an estimated $15-25/mt to the delivered cost of bunker fuel at European ports depending on grade, based on Ship & Bunker's forward estimates using the EIA Short-Term Energy Outlook. This means that even if Brent crude corrects toward the $65-75/bbl range that most institutional forecasts project for H2 2026, the delivered cost of VLSFO and MGO in European ports will remain structurally higher than pre-2024 levels. For the immediate-term outlook, MABUX expects the upward pressure to persist as long as Middle East tensions remain elevated. The key inflection point for bunker buyers: a Strait of Hormuz de-escalation would trigger a rapid unwind of the crude risk premium, but the physical tightness in Singapore and Zhoushan is a separate, fundamental supply problem that could take 4-6 weeks to normalize even with normal crude markets. Quality risks are also rising — US sanctions have caused a twofold increase in HSFO off-spec notifications in Singapore, with the ARA region seeing 4% off-spec test results compared to 2.3% at end-2025, per MABUX data.