45 Pages Posted: 21 Aug 1998
Date Written: July 1998
This paper uses daily returns to examine how mutual funds modify their risk during the last several months of a year based on their performance during the first several months of the year. Relative to monthly data, daily returns provide much more efficient estimates of fund volatility, yielding vastly different inferences about the behavior of fund managers. In particular, monthly results consistent with a tendency for year-to-date underperformers to increase their risk levels relative to better performing funds disappears with daily data. This indicates that results previously attributed to managerial behavior are more likely an artifact of inefficient monthly volatility estimates.
JEL Classification: G12, G14
Suggested Citation: Suggested Citation