Panamax bulkers have enjoyed a rate resurgence this year, along with other dry bulk ships, thanks to better-than-expected demand for coal and steady grain exports. But some market watchers see panamax earnings being increasingly challenged as capesizes and supramaxes grab more business.

The Baltic Exchange’s assessment of panamax rates across major routes stands at more than $5,700 per day, up from the $2,260 per day low seen in February.