A mutual fund pools money from many investors and buys a basket of stocks or bonds on their behalf. One purchase, instant diversification, professional management.
A mutual fund collects money from thousands of investors and uses it to buy a diversified portfolio of stocks, bonds or both. When you invest, you buy units of the fund and own a slice of everything it holds. It's the simplest way to spread a small amount of money across dozens or hundreds of securities at once.
A mutual fund's price is its net asset value (NAV) — the total value of everything it owns, minus costs, divided by the number of units. Unlike a stock or an ETF, a traditional mutual fund prices once per day after the market closes, so every buyer and seller that day gets the same NAV.
An actively managed fund pays managers to pick investments aiming to beat the market. An index fund simply tracks a benchmark like the S&P 500 — see what is a stock market index. Index funds are cheaper because they require little trading, and over long periods most active funds fail to beat their index after fees.
The expense ratio matters: a 1% annual fee may sound tiny, but compounded over 30 years it can quietly consume a large chunk of your returns. Lower-cost funds keep more of the growth in your pocket.
Both hold baskets of securities. The big differences: ETFs trade all day like a stock and often have lower minimums, while mutual funds trade once daily at NAV and may have minimum investment amounts. Many index strategies are available in both wrappers.
Try it risk-free: Build your own basket of tickers to feel how diversification smooths returns in the stock market simulator with play money — no sign-up, no real risk.
Not advice: educational content only. For authoritative basics see the SEC at investor.gov.
Related: what is an ETF, dollar-cost averaging, and what is a portfolio.
It is a pool of money from many investors used to buy a diversified basket of stocks or bonds. You buy units of the fund and own a slice of all its holdings.
By its net asset value (NAV) — the value of everything it holds minus costs, divided by the number of units. Traditional mutual funds price once per day after the market closes.
Both hold baskets of securities, but ETFs trade all day like a stock while mutual funds trade once daily at NAV. ETFs often have lower minimums and intraday liquidity.
It is the annual fee a fund charges, expressed as a percentage of your investment. Even small differences compound heavily over decades, so lower-cost funds keep more of your returns.