What Is a Mutual Fund
The plain answer
Section titled “The plain answer”A mutual fund pools money from many people and uses it to buy a mix of stocks, bonds, or other assets. You own shares of the fund, not a private slice of each holding.
Most mutual fund trades are placed with the fund company and fill at the day’s closing price. That is different from an ETF, which trades throughout the day.
How it actually works
Section titled “How it actually works”The fund’s net asset value is the value of its holdings minus liabilities, divided by shares. Buyers and sellers that day transact at that price after the market closes.
The manager, or a rules-based process, chooses holdings. You pay an expense ratio, and some funds still charge a sales load, which is a commission. A load is a cost you can usually avoid by choosing a no-load fund.
Mutual funds can also create taxable distributions even if you did not sell your shares, because the fund sold holdings inside the portfolio.
What this means for you
Section titled “What this means for you”A mutual fund can be a fine way to own a broad portfolio, especially in a workplace plan that only offers funds, not ETFs. Compare the fee and the holdings against a similar index option.
If your broker offers both, the cheaper index version of the same market is usually the one that leaves more of the return with you.
Common mistakes
Section titled “Common mistakes”Paying a sales load when an identical no-load share class exists.
Picking a fund by last year’s ranking.
Ignoring the expense ratio because the amount looks small as a percentage.
Related pages
Section titled “Related pages”Educational content, not personalized financial, tax, or legal advice. No affiliate relationships. Figures are for tax year 2026 and change annually.Read the full disclaimer.