Unconventional monetary policy and the stock market

We use weekly changes in the size of the Federal Reserve’s balance sheet as a policy tool that has largely been ignored in the literature to investigate the relationship between the unconventional monetary policy and stock market returns when the federal funds rate reaches the zero lower bound. Our empirical framework is based on a structural VAR that is identified using heteroscedasticity in weekly data on the components of the Fed’s balance sheet. We find evidence that the unconventional expansionary monetary policy is effective in stimulating the stock market, as it has positive and statistically significant effects on stock returns. In extending our analysis to disaggregate returns, our findings suggest heterogenous and asymmetric responses of disaggregate returns to an unconventional policy shock.