Annika E. Sundén

Portfolio Choice and Trading in a Large 401(k) Plan

We study nearly 7,000 retirement accounts during the April 1994-August 1998 period. Several interesting patterns emerge. Most asset allocations are extreme (either 100 percent or zero percent in equities) and there is inertia in asset allocations. Equity allocations are higher for males, married investors, and for investors with higher earnings and more seniority on the job; equity allocations are lower for older investors. There is very limited portfolio reshuffling, in sharp contrast to discount brokerage accounts. Daily changes in equity allocations correlate only weakly with same-day equity returns and do not correlate with future equity returns.

Pensions, Social Security, and the Distribution of Wealth

This paper uses the Survey of Consumer Finances (SCF) to examine pension coverage, estimate Social Security and pension wealth for U.S. households in 1989 and 1992, and estimate the effects of pension wealth on non-pension net worth. As expected, the SCF data show that including pensions and Social Security in net worth makes the distribution more even. The analysis of the effects of pension wealth on other types of savings indicates that there is a negative effect of defined benefit plan coverage on non-pension net worth. Surprisingly, the effect of defined contribution plans, such as 401(k) plans is insignificant.