Stock market investing means buying shares of companies or funds, holding them as their value changes, and selling when you choose

When you buy a stock, you own a small piece of a company. When you buy a fund, you own a basket of many stocks or bonds at once. The price of what you own goes up and down based on how the market values it. You make money if you sell for more than you paid, or if the company pays you a dividend (a share of profits). You lose money if you sell for less than you paid. Unlike a savings account, the stock market has no may provide — your money can shrink as well as grow.

To start, you need a brokerage account (an account with a company that lets you buy and sell stocks), money to invest, and a basic understanding of what you are buying. This guide explains how each of these works and what happens after you place your first trade.

Key Takeaways

  • You open a brokerage account with a company like Fidelity, Charles Schwab, or Vanguard, link a bank account, and deposit money before you can buy anything.
  • Stocks are individual company shares; funds bundle many stocks or bonds together, which spreads your risk across more companies.
  • You can start with small amounts — many brokerages have no minimum deposit and let you buy fractional shares for under $100.
  • The stock market is open Monday through Friday during market hours (9:30 a.m. to 4 p.m. Eastern time), and your order executes at the price available when it reaches the exchange.
  • Taxes on stock gains depend on how long you held the stock and your income level, and you owe them whether or not you withdraw the money.

Opening a brokerage account and funding it

A brokerage account is the container that holds your stocks and cash. You open one by choosing a brokerage firm, providing your name, address, Social Security number, and employment information, and linking a bank account. Most brokerages verify your identity online in minutes and let you fund the account the same day by electronic transfer from your bank.

Common brokerages include Fidelity, Charles Schwab, E*TRADE, TD Ameritrade, Vanguard, and Interactive Brokers. Each charges different fees for certain trades or account types, so compare their fee schedules before you choose. Many now offer commission-free stock trades, meaning you pay nothing to buy or sell a stock (though some charge fees for mutual funds or other products).

Once your account is open and funded, you can place an order. The money sits in your account until you tell the brokerage to buy something. If you deposit $500, you have $500 to spend on stocks or funds — you cannot spend more than you deposited unless you use margin (borrowing from the brokerage), which is a separate feature most beginners should avoid.

Stocks versus funds: what you are actually buying

A stock is a share of one company. If Apple has 16 billion shares outstanding and you buy one share, you own one sixteen-billionth of Apple. The price of one share changes throughout the day based on what buyers and sellers agree it is worth. You can buy as few as one share of most stocks, or fractional shares (a piece of a share) if you have less money.

A fund is a collection of many stocks or bonds managed as a single investment. An index fund tracks a specific group — for example, the S&P 500 index fund holds stock in 500 large U.S. companies in the same proportions as the index. An actively managed fund pays a manager to pick which stocks to buy and sell. Funds spread your money across many companies, so if one company's stock drops, the impact on your fund is smaller.

For a beginner, a low-cost index fund often makes more sense than picking individual stocks. You own pieces of hundreds of companies with one purchase, your money is spread across many businesses (reducing risk if one fails), and you pay lower fees than with actively managed funds. A fund costs the same to buy as a stock — you place an order and own it immediately.

How to place your first trade

Once your account is funded, you log into your brokerage's website or app and navigate to the "buy" or "trade" section. You enter the stock symbol (a short code like AAPL for Apple or VOO for the Vanguard S&P 500 index fund), the number of shares you want, and the type of order.

A market order buys immediately at whatever price the stock is trading for right now. If you place a market order for Apple at 10:30 a.m. on a Tuesday, it executes within seconds at the price available at that moment. A limit order lets you set a maximum price you will pay — if you say "buy Apple at $150 or less," the order only executes if the price drops to $150 or below. Limit orders can sit unfilled if the price never reaches your limit.

After you place the order, the brokerage sends it to an exchange (like the New York Stock Exchange), where it matches with a seller. The trade settles two business days later, meaning the stock appears in your account and the money leaves your cash balance. Until settlement, the stock is yours but the transaction is not final.

Understanding market hours and trading delays

The stock market is open Monday through Friday, 9:30 a.m. to 4 p.m. Eastern time. This is called regular market hours. If you place an order during these hours, it executes during the session. If you place an order outside these hours (before 9:30 a.m., after 4 p.m., or on weekends), it waits until the market opens and executes at the next available price.

Some brokerages offer extended hours trading (before 9:30 a.m. or after 4 p.m.), but prices are often wider apart (the difference between what buyers will pay and what sellers want is larger), and fewer traders are active, so your order may not execute at all or may execute at a worse price than during regular hours. For beginners, placing orders during regular market hours is simpler and more predictable.

The market is closed on weekends and on federal holidays like Thanksgiving and Christmas. If you place an order on Friday at 5 p.m., it does not execute until Monday morning at 9:30 a.m., and the price may be very different from Friday's closing price.

How gains and losses work, and what you owe in taxes

If you buy a stock for $100 and sell it for $120, you have a capital gain of $20. If you buy for $100 and sell for $80, you have a capital loss of $20. The gain or loss is the difference between what you paid (your cost basis) and what you sold it for.

The tax you owe on a gain depends on how long you held the stock. If you held it for one year or less, it is a short-term capital gain and is taxed as ordinary income at your regular tax rate. If you held it for more than one year, it is a long-term capital gain and is taxed at a lower rate (0%, 15%, or 20% depending on your income). Long-term gains are almost always better from a tax perspective, which is why many investors hold stocks for at least a year.

You owe taxes on gains in the year you sell, even if you do not withdraw the money from your brokerage account. If you sell a stock in March and make $500, you owe tax on that $500 when you file your return in April of the next year, regardless of whether the money is still in your account. Capital losses can offset capital gains, reducing your tax bill.

Risk, diversification, and how much to invest

Stock prices move up and down based on company performance, economic conditions, and investor sentiment. A stock can lose half its value in months or gain it back just as fast. Unlike a savings account insured by the FDIC, there is no protection if your stock investment loses money. You can lose your entire investment if a company fails.

Diversification means spreading your money across many different stocks or funds so that no single company's failure wipes you out. If you buy one stock and it crashes, you lose everything. If you buy an index fund holding 500 stocks and one crashes, the impact is tiny. Most financial advisors recommend diversification for this reason.

How much to invest depends on your financial situation. Invest only money you will not need for at least five years, because the stock market can be down when you need to sell. Start small if you are new — $100 or $500 teaches you how the system works without risking a large amount. As you learn and build confidence, you can invest more. Many people invest a fixed amount each month (called dollar-cost averaging) rather than trying to time the market perfectly.

What happens after you buy: holding, selling, and monitoring

Once you own a stock or fund, you can hold it as long as you want. You do not have to do anything — the stock sits in your account and its price changes daily. If the company pays a dividend, the cash appears in your account automatically. You can check your account balance anytime through your brokerage's website or app.

When you decide to sell, you log in, find the stock in your holdings, and place a sell order the same way you placed a buy order. The sale executes during market hours, and the cash appears in your account two business days later. You can then withdraw the cash to your bank account, or use it to buy other stocks.

Beginners often check their account too frequently and panic when prices drop. Stock prices move every day, but long-term investors usually ignore short-term swings. If you are holding for five or ten years, daily price changes are noise. If you are holding for three months, daily changes matter more.

Frequently Asked Questions

How much money do I need to start investing in stocks?

Most brokerages have no minimum deposit. You can open an account and invest $50 or $100. Many brokerages now offer fractional shares, so you can buy a piece of an expensive stock like Amazon or Berkshire Hathaway for under $100. Start with what you can afford to lose without affecting your bills or emergency savings.

Can I lose more money than I invested?

With regular stock purchases, no — the worst case is that your stock goes to zero and you lose your entire investment. With margin (borrowing from your broker) or options trading, you can lose more than you invested, but these are advanced strategies beginners should avoid.

What is the difference between a brokerage account and a retirement account like an IRA?

A regular brokerage account has no contribution limits and no tax advantages, but you can withdraw money anytime without penalty. An IRA (Individual Retirement Account) has contribution limits and tax advantages, but you cannot withdraw money before age 59½ without a penalty. Many people use both — a brokerage account for short-term goals and an IRA for retirement.

Do I have to pick individual stocks, or can I just buy funds?

You can do either. Many successful long-term investors buy only index funds and never pick individual stocks. Funds are simpler for beginners because one purchase gives you instant diversification. Individual stocks require more research and monitoring, but some people find them more interesting.

What should I do if the stock market crashes?

If you are holding for the long term (five years or more), crashes are normal and usually recover within months or a few years. Selling during a crash locks in your losses. Most advisors recommend staying invested and continuing to buy if you have money to invest — you buy stocks at lower prices, which helps your long-term returns. If you need the money soon, a crash is a problem, which is why you should not invest money you need within five years.