Banks play a critical role in international trade by providing trade finance products that reduce the risk of exporting. This paper employs two new data sets to shed light on the magnitude and structure of this business, which, as we show, is highly concentrated in a few large banks. The two principal trade finance instruments, letters of credit and documentary collections, covered about 10 percent of U.S. exports in 2012. They are preferred for larger transactions, which indicates the existence of substantial fixed costs in the provision and use of these instruments. Letters of credit are employed the most for exports to countries with intermediate degrees of contract enforcement. Compared to documentary collections, they are used for riskier destinations. We provide a model of payment contract choice that rationalizes these empirical findings, and we discuss implications for the ongoing provision of trade finance.

Shipping goods internationally is risky and takes time. To allocate risk and to finance the time gap between production and sale, a range of payment contracts is utilized. I study the optimal choice between these payment contracts and their implications for trade. The equilibrium contract is determined by financial market characteristics and contracting environments in both the source and the destination country.Trade increases in enforcement probabilities and decreases in financing costs proportional to the time needed for trade. Empirical results from gravity regressions are in line with the model, highly significant and economically relevant. They suggest that importer finance is as important for trade as exporter finance.

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