Economists have suggested a number of reasons why trade declined so steeply, including the imposition of some of protectionist measures. But the consensus that has emerged centres on a sharp contraction in global demand as the primary cause. This was magnified by the product composition of the fall in demand, by the presence of global supply chains, and by the fact that the decline in trade was synchronized across countries and regions(1). The weakness in private sector demand was linked to the global recession triggered by the sub-prime mortgage crisis in the United States. What began in the US financial sector soon spread to the real economy, with global repercussions. Limited availability of trade finance also played a role.