While bank supervisors frequently cooperate across countries, novel data on 268 cooperation agreements reveal that such cooperation falls short of covering the global operations of large banking groups. We show that this causes material regulatory arbitrage: banking groups allocate lending activities and risk into third-country subsidiaries when cooperation agreements cover their operations in other countries. The average distortion in a country’s foreign lending caused by regulatory arbitrage is 21 percent, with the effect being magnified in the presence of a weak supervisory framework. Taken together, our results indicate that incompleteness in cooperation substantially diminishes its global effectiveness.

We examine the effects of cross-border supervisory arbitrage on corporate lending and firm performance. We show that subsidiaries of banking groups improve loan conditions for firms when the group’s opportunities to take risks in other countries are curbed. The expansion in lending is targeted towards firms of higher quality and firms that the group is already familiar with. The improved lending conditions have positive real effects, allowing recipient firms to increase capital spending and leading to higher profits. Taken together, our results suggest that there can be benefits for firms in countries that receive lending inflows due to the supervisory arbitrage.