From :
Mutual Fund Performance:
An Empirical Decomposition into
Stock-Picking Talent, Style,
Transactions Costs, and Expenses
THE JOURNAL OF FINANCE ⢠VOL. LV, NO. 4 ⢠AUGUST 2000
RUSS WERMERS*
F. Do Funds that Trade More Frequently Generate Better Performance?
A concept that is central to the idea of actively managed funds outperforming
index funds is that higher levels of trading activity are associated
with better stock-picking abilities. Do higher levels of mutual fund trading
result in higher levels of performance? Our next tests address this issue by
examining the performance of high- versus low-turnover funds. If more frequent
trading is associated with managers having better stock-picking talents,
then we should observe a corresponding increase in performance, at least before trading costs and expenses are factored in. If, instead, managers
trade more frequently in an attempt to convince investors that they can
successfully pick stocks, we should see no increase in performance before
costs and expenses. In this case, we should actually see lower performance,
after costs and expenses are deducted, for frequent traders. Carhart ~1997!
finds evidence that supports this view, although his data set does not allow
an examination of performance at the stock holdings level.
We proceed as follows. At the end of each year, beginning on December 31,
1975, and ending December 31, 1993, we rank all mutual funds ~with at
least a one-year history! on their turnover level of the prior year ~the âranking
yearâ!. Fractile portfolios are formed based on this ranking, and TNAaverage
fund returns and characteristics are computed over the following
year ~the âtest yearâ!. In computing the test year average returns or performance
measures, we first compute TNA-average measures for each quarter
of the test year, across all funds that existed during that quarter ~whether or
not they survived past the end of the quarter! to minimize survival bias.
Then, these quarterly TNA-weighted buy-and-hold returns are compounded
into a quarterly rebalanced test-year return.
http://www.rhsmith.umd.edu/faculty/rwermers/mutuals.pdf