Author(s):	Felipe Saraiva Iachan, Plamen T. Nenov, Alp Simsek
Publication Date:	January 2020
Keyword(s):	belief disagreements, Customization, financial innovation, interest rate, Risk premium, Savings, Speculation, Stock Market Participation
JEL(s):	E21, E43, E44, G11, G12
Programme Areas:	Financial Economics, Monetary Economics and Fluctuations, Macroeconomics and Growth
Link to this Page:	cepr.org/active/publications/discussion_papers/dp.php?dpno=14361

Financial innovation in recent decades has expanded portfolio choice. We investigate how greater choice affects investors' savings and asset returns. We establish a choice channel by which greater portfolio choice increases investors' savings---by enabling them to earn the aggregate risk premium or to take speculative positions. In equilibrium, portfolio customization (access to risky assets beyond the market portfolio) reduces the risk-free rate. Participation (access to the market portfolio) reduces the risk premium but typically increases the risk-free rate. Empirically, stock market participants in the U.S. save more than nonparticipants, and have increasingly dispersed portfolio returns, consistent with the choice channel.