This study presents a methodology for analyzing procyclical systemic risk arising from joint monetary and prudential policy decisions. We analyze the impact of different scenarios of the monetary policy interest rate on the leverage ratio of US commercial banks. The Dynamic Conditional Correlation - Semi-nonparametric model and bivariate spectral analysis are applied to model the dynamics among the variables. The results indicate that high and low interest rates increase leverage while medium rates reduce it. The importance of considering asymmetries and heavy tails of probability distributions in stress tests and the dynamics of the correlation between variables is highlighted when assessing financial stability.