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When should you use an actively managed mutual fund in a 401k?
By definition, actively managed funds will underperform passive index funds as a whole. Or more specifically: The aggregate performance of all actively managed portfolio of publicly-tradable assets will have equal performance to those of passively managed portfolios. Which taken with premise two: Actively managed funds will charge higher fees than passively managed funds Results in: In general, lower-fee investment vehicles (e.g. passive index investments) with broad enough diversification to the desired risk exposure will outperform higher-fee options But don't take my wonkish approach, from a more practical perspective consider: