Mutual Funds

A mutual fund is a pooled investment vehicle that holds a portfolio of securities — stocks, bonds, or a mix — on behalf of many shareholders, managed by a professional advisor. Shares are issued and redeemed at the day-end NAV (net asset value); there is no intraday trading in the fund itself. Mutual funds dominated retail investing for half a century before ETFs displaced most of their growth, and they remain prevalent inside employer retirement plans where ETF access is limited.

The structural feature that matters for taxable accounts is the annual capital-gains distribution. Strictly, nothing compels a fund to distribute: IRC §851, “Definition of regulated investment company” and IRC §852 condition pass-through treatment on distributing substantially all income, and IRC §4982 adds a 4% excise tax on undistributed amounts. A fund that retains gains simply pays corporate tax on them. The economics make that unthinkable, so in practice every fund distributes, and realized gains inside the fund land on your 1099 whether or not you sold a single share — including gains generated by other shareholders redeeming. That is the wrapper inefficiency that pushed serious taxable money into ETFs and direct indexing in the first place. The investor-side mechanics — fee structures, share classes, NAV vs. market price, tax efficiency, how to actually pick a fund, and the case against mutual funds in large taxable accounts — are in section “Mutual Funds”.