A pooled cross-section/time series analysis is used to assess the long
-run relationship between risk-adjusted performance of equity mutual f
unds and asset size expense ratios, portfolio turnover, and load/no-lo
ad status. The data base consists of investment results of 151 equity
mutual funds in continual operation over the 20-year period from 1971
to 1990. Variations of the cross-section/time series model are employe
d to explore the interactions among the nature of the funds (load or n
o-load) with asset size and expense ratios. Investment performance is
not related to asset size, turnover rate, or load/no-load status, and
higher expenses are associated with higher returns.