U.S. retailers accelerate imports from China by four to six weeks to stock up for the holiday season before anticipated tariff increases, boosting shipping demand and freight rates despite broader trade uncertainty.
Container shipping rates on Asia–U.S. routes have roughly doubled as the Iran conflict drives up fuel costs and disrupts global oil flows. Importers are also frontloading cargo, adding further pressure on already tight shipping capacity.
March’s modest growth was fueled by front-loaded shipments following the IEEPA ruling—underlying demand remains weak, with adjusted volumes pointing to one of the longest sustained downturns in U.S. shipping history.