ETFs and mutual funds both pool money into a basket of investments—but the key difference between them is that mutual funds trade just once per day after the market closes, while ETFs trade like stocks throughout the day at fluctuating prices.

Mutual funds invest in multiple different companies with money from many investors, while an individual stock invests in one company with funds from a single investor.

Mutual funds are categorized as stock, bond, money market, and target-date funds.

Mutual fund share classes are rankings of different types of services for investors.

Mutual funds pool money to create larger investment opportunities with higher returns for anyone who initially invests in the fund.

How mutual funds work

Mutual funds function similarly to other types of investments. If you want to invest, you go through a brokerage firm. However, they have a few key differentiators. Most are actively managed by a broker instead of passively earning you returns. Plus, they can carry some hefty fees.

Mutual funds come with a few associated fees.

Investing in mutual funds can give you access to a wide range of securities, such as stocks and bonds, with just a single investment.

Mutual fund investors typically must pay a variety of different types of taxes associated with their investment, unless the funds are within tax-advantaged accounts like a 401(k) or IRA.

Read about the pros and cons of mutual funds.

Index funds are typically structured as either mutual funds or exchange-traded funds, but investors can manually recreate an index through 'direct indexing.'

The price of a mutual fund is based on its net asset value (or NAV).

Contrary to popular belief, random investments can outperform managed funds.

Companies often use different share classes, like Class A or Class B, to structure ownership

Share classes refer to specific types of company stock that are distinguished by the rights they grant, such as voting power and dividend access.

What's the difference between a stock and a share?

While the words "stock" and "share" are often used interchangeably in casual conversation, they have different meanings. For instance, "stock" is more general, whereas "share" is more precise.

Mutual funds were first created and sold in the US in 1924.

ETFs and mutual funds are both taxed on capital gains and on dividends.

Retail investors are average joes, while institutional investors often move billions of dollars a day

Retail investors often trade 100 shares at a time, while institutional investors trade 10,000 or more. The biggest difference is that, unlike retail investors, institutional investors are professionals who are trading someone else’s money.

Figure out what type of mutual fund is right for you with a tool that lets you compare different mutual funds, from rates to returns.

'The stock market' can be loosely defined as a set of exchanges and other places where shares of public companies are bought and sold.

Explore the differences between private equity, venture capital, and hedge funds

Private equity firms focus on buying and improving private companies with the intent to sell them for profit or take them public. Venture capital is technically a form of private equity in which investors focus on startups and generally don't seek majority control of the company. Hedge funds are pooled investments for sophisticated investors that pursue a wide range of often complex strategies.

Visualize the differences between the New York Stock Exchange and the Nasdaq.

Periodically, the Federal Open Market Committee decides whether to raise, hold, or lower the federal funds rate

The federal funds rate is the interest rate at which banks lend their excess funds through the Fed. This influences what banks are willing to pay consumers for their deposits in savings and CD accounts. Typically, the higher the federal funds rate, the higher the interest rates on CDs.

Stock options give investors the right to buy or sell a stock at an agreed-upon price and date

There are two types of options: calls, which are bets that a stock will rise (or not rise past a certain point), and puts, bets that a stock will fall (or not fall past a specific level). While stock options give investors the right to do these trades, they do not obligate buyers to follow through with them—sellers, on the other hand, must perform the option if it is exercised

The difference between stocks and bonds

While more people invest in stocks than bonds, experts say owning both can make for a healthier portfolio. Stocks are considered a riskier investment than bonds, but tend to have higher returns. While bonds might be the safer option, they won’t grow your wealth as quickly.

Retail investors are individuals who trade stock for themselves

Institutional investors, on the other hand, are investing for someone else. There are big differences between the two, one being that institutional investors can be granted certain special treatment (like being able to purchase IPOs right away).

ETFs were first created as an alternative to mutual funds, combining the diversification benefits of a mutual fund with the ability to trade throughout the day on a stock exchange.

Shares are parts of a stock that represent ownership of a company

Shares are traded on the stock market. Once you buy a single share of a company, you are considered a shareholder of that company and may have certain rights as a partial owner, such as voting on business decisions.

Hedge funds make money from imposing steep fees on investors, as well as from investment performance

Hedge funds often operate on a "2 and 20" model: Investors pay fund managers a 2% management fee, and the hedge fund keeps 20% of their profits. (The 2% is imposed annually, irrespective of performance.) Hedge funds are known for chasing big returns—and taking big risks to get them. This explainer not only breaks down how they work in detail, but also the strategy first introduced in 1949 that still shapes hedge fund investing today.

Explore a list of the world's largest mutual funds.

There are three main ways to start investing in the bond market

Invest in the boind market through a brokerage, mutual fund or ETF, or the US government. Each has different steps and terms to follow, from starting rates to opening specific accounts. Some bonds are relatively easy to purchase, but the process differs depending on the type of bond you want.

Investors can buy three main types of bonds: government, corporate, and municipal

Each type has variations of its bond offerings with different interest rates, loan lengths, maturity dates, and terms. Each type also carries its own risks and rewards.

Different types of endowments, explained

​This Investopedia article provides a comprehensive overview of financial endowments—donations made to nonprofit institutions like universities, museums, or hospitals. It explains how endowments are structured, the various types (such as restricted and quasi-endowments), and how they are managed to support an institution's mission over time.

Some private credit funds trade on the stock market

These funds, which trade at market prices, are called "public BDCs," which stands for "business development companies." For instance, the global alternative investment manager Ares Management Corp. has a public BDC.

When compared to stocks and bonds, alternative investments are often less regulated

Alternative investments are also often less liquid than traditional investments; they carry unique risk, return, and tax considerations.

Many hedge funds use short selling as an alternative investment strategy to offset risk

Hedge funds typically use a "long-short" investment strategy—where funds diversify by investing in a mix of long positions and short positions—to balance risk and maximize profits. Including short positions gives hedge funds some protection against downturns in the market, although the strategy can have uncapped losses for investors.

Test your ETF knowledge

A 10-question quiz from the SEC allows investors to test their basic knowledge about exchange-traded funds and their investing counterparts, mutual funds. Here’s a sample question: Is the past performance of a fund a good indicator of future results? (Hint, the answer is no).