A buyer who, five years ago, sourced a category from a single low-cost origin now keeps a second supplier in a different region on standby. A corridor that was chosen purely on freight rate is now weighed against tariff exposure and the odds of a sudden border measure. The arithmetic of trade has gained variables, and they do not net out to cheaper.
Volumes are not falling. The flows are simply rearranging — shorter in some categories, politically charged in others, and heavier with paperwork almost everywhere. The firms that thrived on a single optimised route are discovering that the route was the easy part.