Trade Analytics

Bilateral Mirror Trade Discrepancy

Divergence between exporter-reported and importer-reported customs volumes or values for the same bilateral commodity flow.

A bilateral mirror trade discrepancy is the gap between what an exporting country reports shipping to a partner and what that importing country reports receiving for the same commodity and period in customs ledgers such as UN Comtrade. Small differences occur routinely because exports are typically valued free on board while imports include cost, insurance, and freight, and long ocean voyages straddle monthly reporting cutoffs. Large, persistent, or one-sided tonnage gaps, however, often point to intermediate transshipment, bonded-warehouse re-export, destination switching at sea, or customs misclassification. Overwatch exposes mirror trade discrepancies through its trade-flow API and workbench so analysts can reconcile official customs declarations against observed vessel loadings and destination reliability.

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