Monetary Policy, Redistribution, and Risk Premia∗ Rohan Kekrey Moritz Lenelz September 2019 Abstract We study the transmission of monetary policy through risk premia in a heteroge- neous agent New Keynesian environment. Heterogeneity in agents' marginal propensity to take risk (MPR) summarizes differences in risk aversion, constraints, rules of thumb, background risk, and beliefs relevant for portfolio choice on the margin. An unexpected reduction in the nominal interest rate redistributes to agents with high MPRs, lower- ing risk premia and amplifying the stimulus to the real economy through investment. Quantitatively, this mechanism rationalizes the empirical finding that the stock market response to monetary policy shocks is driven by news about future excess returns. JEL codes: E44, E63, G12 ∗We thank Adrien Auclert, Markus Brunnermeier, Emmanuel Farhi, Zhiguo He, Anil Kashyap, Gita Gopinath, Francois Gourio, Veronica Guerrieri, Erik Hurst, Nobu Kiyotaki, Stefan Nagel, Brent Neiman, Monika Piazzesi, Martin Schneider, Alp Simsek, Ludwig Straub, Gianluca Violante, Ivan Werning, Tom Winberry, and Moto Yogo for discussions. yUniversity of Chicago Booth School of Business. Email:
[email protected]. zPrinceton University. Email:
[email protected]. 1 Introduction In the data, expansionary monetary policy lowers risk premia. This finding has been es- tablished for the equity premium in stock markets, the term premium on longer maturity nominal bonds, and the external finance premium on risky corporate debt.1 The basic New Keynesian framework as described by Woodford (2003) and Gali (2008) does not capture this aspect of monetary policy transmission. As noted by Kaplan and Violante (2018), this is equally true for an emerging body of heterogeneous agent New Keynesian models whose focus on heterogeneous marginal propensities to consume has substantially enriched the im- plications for aggregate consumption but less so for asset prices and therefore investment.