Spot tanker earnings have ticked up due to reduced bunker costs following the Opec+ deal, but low trading activity overall is expected to curb rate gains.

After two weeks of stalemate, Opec and its Russia-led allies agreed over the weekend to hike their crude output by 400,000 barrels per day every month from August until at least December.

The news triggered sharp falls in crude futures, even though additional Opec+ barrels are yet to hit the market, bringing down marine fuel prices across main bunkering...