2 countries. Our methodology largely follows that described in Buch and Goldberg (2016) and is part of the joint research effort of the IBRN on cross-border prudential policy spillovers. 2 Our first specifications test whether U.S. global banks and U.S. branches and subsidiaries of foreign banks adjust their lending in response to foreign prudential instrument changes. We find statistically significant effects for 3 instruments: capital requirements, local currency reserve requirements, and limits on loan-to-value (LTV) ratios. The tightening of prudential instruments abroad increases loan growth in the United States. Higher foreign country capital requirements abroad mainly affect U.S. loan growth through U.S. global banks, while higher local currency reserve requirements and limits on LTV ratios mainly transmit through the lending of the U.S. branches and subsidiaries of foreign banks. Our second set of tests investigates whether U.S. global banks' exposures in foreign countries react to prudential instrument changes there. The evidence is weaker in this case. Foreign changes in prudential instruments have a weak and mostly insignificant effect on U.S. banks' claims on residents in the country where the change occurs. Lastly, we explore whether changes in U.S. prudential instruments have effects across borders. While foreign economies have used a combination of both cyclical and structural instruments, U.S. policymakers have favored structural regulations that are less correlated with the financial cycle and are not changed frequently (Elliott, Feldberg, and Lehnert, 2013). As a result, the only U.S. instrument change recorded in the IBRN Prudential Instruments Database is related to the introduction of the Basel 2.5 capital regulations in 2013q1. Our results indicate that after this change the largest U.S. banks, those that are required to participate on annual stress tests or follow the Advanced Approaches capital framework, reduced their foreign lending growth relative to the smaller banks. 3 2 The following studies are part of the IBRN study on the impact of prudential instrument changes on the activities of global banks: