Fuel Oil Markets Face Dual Pressure from Hormuz Standoff and Rhine Drought

Global fuel oil markets are navigating a complex landscape marked by geopolitical tensions at a key shipping chokepoint and severe logistical disruptions in Europe, according to a market outlook by Alkagesta. The analysis, published on 11 August 2026, highlights the ongoing diplomatic impasse over the Strait of Hormuz and historically low water levels on the Rhine River as primary drivers of market strain.

Diplomatic efforts to reopen the Strait of Hormuz have stalled, with both the United States and Iran reportedly demanding war reparations. This has led to a near one-month low in Strait transits, with only 13 ships recorded on 9 August following an attack on an ADNOC-linked tanker. Concurrently, traffic through the Bab al-Mandab strait reached its lowest 2026 level earlier in the week with 16 ships. These developments, which follow Alkagesta's July 13 update on the naval blockade, continue to heighten supply fears within the energy complex.

In Europe, inland logistics have been declared a "state of emergency" as water levels at the Rhine's Kaub chokepoint plummeted to 16 cm on 10 August, with forecasts indicating a potential drop to just 4 cm by 14 August. Such levels effectively halt barge traffic, trapping fuel oil stocks in the Amsterdam-Rotterdam-Antwerp (ARA) hub and exacerbating supply challenges across the region. This situation represents a significant deterioration since July, when Kaub levels stood at 43 cm.

Market Price Movements and Inventory Shifts

The dual pressures have influenced various market indicators. Crude futures have displayed volatility, with front-month ICE October Brent futures fluctuating from a more than 5% drop to $79.36/b on 4 August amidst deal rumours, before recovering to $83.55/b by 7 August as negotiations stalled. Physical crude markets also reacted, with the Platts cash Dubai differential rising to a $7.49/b premium over same-month futures on 4 August after a cargo ship was reportedly hit near Khasab, Oman.

Singapore fuel oil prices saw sharp gains, with FOB Singapore 380 CST HSFO reaching $554.26/mt and 0.5% Marine Fuel climbing to $743.76/mt by 7 August. The 380 CST HSFO cash premium in Singapore increased by nearly 74% in the first week of August, reaching a multi-week high of $24.08/mt, partly due to strong bidding from Chinese entities. The Singapore 0.5%S Marine Fuel cash premium peaked at a more than four-month high of $58.91/mt on 4 August before moderating. In Northwest Europe, physical prices for 0.5% FOB Rotterdam barges surged $18.00/mt to $602.75/mt, and 3.5% FOB Rotterdam barges rose $14.50/mt to $479.75/mt on 10 August. The Singapore Hi-5 spread (VLSFO vs. HSFO) hit a multi-year high of $225.93/mt on 3 August, reflecting a shortage of low-sulphur blending components.

Inventory levels showed mixed trends. Fuel oil stocks in the ARA hub increased by 24.69% to 707,000 mt in the week ended 6 August, the highest build in six weeks, as Rhine logistical constraints left product stranded. Conversely, heavy distillate stocks in Fujairah rose 8.6% to 3.787 million barrels by 3 August, the first increase in four weeks.

Regional Supply and Demand Dynamics

In Singapore, fuel oil imports from the Middle East nearly tripled week-over-week by 29 July, reaching 328,878 mt, primarily from Iraq, Saudi Arabia, and the UAE. This influx contributed to an 8% rise in onshore commercial heavy distillate stocks to a five-week high of 19.58 million barrels by 5 August. Despite this, fuel oil outflows from Singapore declined by 57.4% week-over-week, hitting a more than one-year low of 150,139 mt, with shipments to China significantly reduced. July bunker fuel sales in Singapore are estimated to have fallen by 3.7% month-over-month to 4.44 million mt, as elevated premiums deterred demand and redirected inquiries to alternative regional ports like Zhoushan and Port Klang. Mithat Çiftçioğlu, Marine Fuels Distribution Director at Alkagesta Singapore, stated that "As long as Hormuz remains closed, it will not be oil prices but fuel access that constitutes the defining risk for global shipping."

In Northwest Europe, HSFO remains well-supplied by imports from the Americas, with 394,441 mt expected to discharge in August from Venezuela, Colombia, and Mexico. However, VLSFO supplies remain constrained due to refiners prioritising high-margin diesel and a sourer crude slate limiting low-sulphur production. Inland European supply is critical, with barges at Kaub forced to reduce loads to 15-20% capacity (approximately 250 mt) due to low water levels. European bunker demand has entered a seasonal lull, although Mediterranean HSFO demand was supported by utility purchases for summer electricity generation.

Alkagesta's strategic outlook suggests VLSFO component scarcity will persist due to global shifts to sourer crude and high diesel cracks, keeping Singapore Hi-5 spreads above $200/mt through Q3. The geopolitical stalemate is expected to keep crude prices elevated, with analysts suggesting the global market needs an additional 2.1 million b/d for 18 months. An "acute escalation" and "total breakdown" in Rhine-linked inland distribution is anticipated by mid-August, potentially creating a significant disconnect between Northwest and Central/Eastern European markets.

Source: Alkagesta