Fuel oil spreads tighten as Mediterranean blending demand returns

Fuel oil markets have spent most of the summer in a narrow band. That changed over the past month, as blending demand around Mediterranean storage hubs pulled residual barrels out of floating storage and into shore tanks, tightening the visible balance and lifting cracks against crude.

Traders describe a market where the constraint is not crude supply but the availability of suitable cutter stock. Blenders working to meet low-sulphur bunker specifications need light components in volumes that refiners have been reluctant to release while distillate margins remain healthy.

"The economics only work if you can secure the cutter at a sensible differential," one Mediterranean-based products trader said. "When that differential widens, the whole blend goes underwater, and people step back rather than chase the barrel."

Shipping costs are the second variable. Short-haul product tanker rates have firmed alongside the blending activity, and the freight component now accounts for a meaningful share of delivered cost into the region's bunkering ports.

Whether the strength persists depends largely on refinery run rates through the autumn maintenance season. Several regional refiners are scheduled for turnarounds that would remove both residual output and the light components blenders rely on, a combination that historically pulls the market in both directions at once.

For brokers, the practical effect has been a busier enquiry book. Intermediaries report more requests for term storage and blending arrangements than at any point this year, a signal that participants expect the current structure to hold into the fourth quarter.