They're so high they don't have much more room to run. So goes a common belief in the container market, despite the fact that this premise has already been proven wrong, and that container rates could theoretically have a lot more room to run if the upper limit is defined the same way it is in non-containerized shipping.

One leading freight-forwarder executive told American Shipper in August 2020 after the initial spike, "I do not think there is room for growth beyond $4,000 [per forty-foot equivalent unit or FEU]." Nine months later, many all-in trans-Pacific rates including premium charges are more than double that — and rising sustainably. Importers commonly pay $8,000-$10,000 per FEU or more, including extra charges, sometimes a lot more.

But why stop there?