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"Statisticians will tell you that you need 20 years worth of
data -- that's right, two full decades -- to draw statistically
meaningful conclusions. Anything less, they say, and you have
little to hang your hat on. But here's the problem for fund
investors: After 20 successful years of managing a mutual fund,
most managers are ready to retire. In fact, only 22 U.S. stock
funds have had the same manager on board for at least two decades--and
I wouldn't call all the managers in that bunch skilled." |
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Susan
Dziubinski, University editor with Morningstar.com |
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