What Drives Variation in Investor Portfolios? Evidence from Retirement Plans
By Mark Egan, Alexander MacKay & Hanbin Yang We study empirical patterns in investment behavior using a comprehensive data set of defined contribution plans. Using plan-level portfolio allocation data for the near universe of 401(k) plans over the period 2009-2019, we document substantial differences in investment behavior across plans. Plans with wealthier and more educated participants tend to have higher equity exposure while plans with more retirees and minorities tend to have lower equity exposure. These patterns cannot be explained...
