The effect of US stress tests on monetary policy spillovers to emerging markets

This paper explores the transmission of US monetary policy through US banks to emerging market economies (EMEs) and the role that stress tests play in this transmission. Data on US banks' monthly commercial and industrial loan originations shows that: (a) US bank lending to EMEs was sensitive to domestic monetary policy changes during the zero-lower bound period. (b) Effects of monetary easing were heterogeneous across banks and depended on banks' stress test results, a proxy for their capital strength. Only banks that comfortably passed the stress tests issued more loans to EME borrowers. (c) Effects of monetary tightening were more similar across banks. (d) Banks shifted their lending to safer borrowers within EMEs in response to monetary easing, leaving the risk of their overall loan books unchanged. These results support the hypothesis that bank capital affects the transmission of easier monetary policy, including across borders. We conjecture that bank lending to EMEs during the zero-lower bound period would have been even higher had the United States not introduced stress tests for their banks.