While simpler than risk-based capital requirements, the leverage ratio may encourage bank risk-taking. This paper examines the activity of broker-dealers affiliated with bank holding companies (BHCs) and broker-dealers not affiliated with BHCs in the repurchase agreement (repo) market to test whether this may be occurring. Using data on the triparty repo market, the paper arrives at three findings. First, following the 2012 introduction of the supplementary leverage ratio (SLR), broker-dealer affiliates of BHCs decreased their repo borrowing but increased their use of repo backed by more price-volatile collateral. Second, the paper finds that regardless of whether a U.S. BHC-affiliated broker-dealer parent is above or below the SLR requirement, the announcement of the SLR rule has disincentivized those dealers affiliated with BHCs from borrowing in triparty repo. Finally, the paper finds an increase in the number of active nonbank-affiliated dealers in certain asset classes of triparty repo since the 2012 introduction of the supplementary leverage ratio. This illustrates how regulation can have competitive effects on the financial sector and may result in activities shifting among financial firms.

U.S. supervisory stress tests to date have focused on the resilience of large banks to withstand the direct effects of credit and trading shocks. Using data from Depository Trust & Clearing Corporation (DTCC), we apply the Federal Reserve's Comprehensive Capital Analysis and Review (CCAR) supervisory scenarios to evaluate the default of a bank's largest counterparty. We find that indirect effects of this default, through the bank's other counterparties, may be larger than the direct impact on the bank. Further, when taken as a whole, the core banking system has a higher exposure concentration to a single counterparty than does any individual bank holding company. We find that the U.S. banking system's counterparty exposure concentration has risen over the 2013–2015 period. Under the 2015 CCAR this corresponds to a market diversity with just over three counterparties under stress. Our results are the first to evaluate the U.S. credit derivatives market under stress and underscore the importance of a macroprudential perspective on stress testing.