How Online Trading Works
Legend has it that Joseph Kennedy sold all the stock he owned the day before "Black Thursday," the start of the catastrophic 1929 stock market crash. Many investors suffered enormous losses in the crash, which became one of the hallmarks of the Great Depression.
What made Kennedy sell? According to the story, he got a stock tip from a shoeshine boy. In the 1920s, the stock market was the realm of the rich and powerful. Kennedy thought that if a shoeshine boy could own stock, something must have gone terribly wrong.
Now, plenty of "common" people own stock. Online trading has given anyone who has a computer, enough money to open an account and a reasonably good financial history the ability to invest in the market. You don't have to have a personal broker or a disposable fortune to do it, and most analysts agree that average people trading stock is no longer a sign of impending doom.
The market has become more accessible, but that doesn't mean you should take online trading lightly. In this article, we'll look at the different types of online trading accounts, as well as how to choose an online brokerage, make trades and protect yourself from fraud.
Review of Stocks & Markets
Before we look at the world of online trading, let's take a quick look at the basics of the stock market. If you've already read How Stocks and the Stock Market Work, you can go on to the next section.

A share of stock is basically a tiny piece of a corporation. Shareholders -- people who buy stock -- are investing in the future of a company for as long as they own their shares. The price of a share varies according to economic conditions, the performance of the company and investors' attitudes. The first time a company offers its stock for public sale is called an initial public offering (IPO), also known as "going public."
When a business makes a profit, it can share that money with its stockholders by issuing a dividend. A business can also save its profit or re-invest it by making improvements to the business or hiring new people. Stocks that issue frequent dividends are income stocks. Stocks in companies that re-invest their profits are growth stocks.
Brokers buy and sell stocks through an exchange, charging a commission to do so. A broker is simply a person who is licensed to trade stocks through the exchange. A broker can be on the trading floor or can make trades by phone or electronically.
An exchange is like a warehouse in which people buy and sell stocks. A person or computer must match each buy order to a sell order, and vice versa. Some exchanges work like auctions on an actual trading floor, and others match buyers to sellers electronically. Some examples of major stock exchanges are:
If you need a broker to help you with your trades, you'll need to choose a firm that offers that service. We'll look at other qualities to look for in an online brokerage next.

Photo courtesy Pixel Perfect Digital
With a cash account, you buy stocks with the money in your account. With a margin account, you can buy on credit.
Logos are registered trademarks of their respective companies. All rights reserved.
E*Trade, Ameritrade and Charles Schwab are three of the many online brokerages.Before you can trade stocks online, you have to select an online broker. Your online broker will execute your trades and store your money and stock in an account. The online trading industry has seen lots of mergers and acquisitions, but there are still many firms to choose from. Different firms also offer different levels of help, account types and other services. Here are some things you should keep in mind as you look for a broker.
As with any site that requires your personal and financial information, you should make sure your online broker has good security measures, including automatic logouts and transmission encryption. You should also make sure your brokerage is reputable. The Investing Online Resource Center has a good list of links you can use to make sure your firm is legitimate.
Opening & Funding an Account
When you open an account with a United States online brokerage, you'll answer questions about your investment and financial history. These questions determine your suitability for the account you are requesting -- the brokerage cannot legally allow you access to investments that you cannot reasonably handle. You will also have to provide your address, telephone number, social security number and other personal information. This helps the brokerage track and report your investments according to tax regulations and the PATRIOT Act.
In addition to providing this information, you must make several choices when you create an account. With most brokerages, you can chose between individual and joint accounts, just like at a bank. You can also open custodial accounts for your children or retirement accounts, which are often tax-deferred. Unless you pay a penalty, you can usually retrieve earnings from a retirement account only when you retire.
Next, you must choose between a cash account and a margin account. You can think of a cash account as a straightforward checking account. If you want to buy something using your checking account, you have to have enough money in the account to pay for it. Using a cash account, you have to have enough money to pay for the stock you want.
A margin account, on the other hand, is more like a loan or a line of credit. In addition to the actual cash in the account, you can borrow money from the brokerage based on the equity of the stock you already own, using that stock as collateral. Then, you can buy additional stock. Your margin is the equity you build in your account.
According to the Federal Reserve Board, you must have at least 50 percent of the price of the stock you wish to purchase in your account. In other words, if you want to purchase $5,000 worth of stock, the value of the cash and stock in your account must be at least $2,500. You can borrow the other $2,500 from the brokerage.
Once you have made your purchase, you must keep enough equity in your account, also called your equity percentage, to cover at least 25 percent of the securities you have purchased. Here's how the brokerage determines this number:
Margin accounts are definitely more complex than cash accounts, and buying on credit presents additional financial risks. If all of that sounds overwhelming, it's a good idea to stick with a cash account. If you'd like some more examples of how margin accounts work, check out the IORC's Investing Simulator Center.
What made Kennedy sell? According to the story, he got a stock tip from a shoeshine boy. In the 1920s, the stock market was the realm of the rich and powerful. Kennedy thought that if a shoeshine boy could own stock, something must have gone terribly wrong.
Now, plenty of "common" people own stock. Online trading has given anyone who has a computer, enough money to open an account and a reasonably good financial history the ability to invest in the market. You don't have to have a personal broker or a disposable fortune to do it, and most analysts agree that average people trading stock is no longer a sign of impending doom.
The market has become more accessible, but that doesn't mean you should take online trading lightly. In this article, we'll look at the different types of online trading accounts, as well as how to choose an online brokerage, make trades and protect yourself from fraud.
Review of Stocks & Markets
Before we look at the world of online trading, let's take a quick look at the basics of the stock market. If you've already read How Stocks and the Stock Market Work, you can go on to the next section.

A share of stock is basically a tiny piece of a corporation. Shareholders -- people who buy stock -- are investing in the future of a company for as long as they own their shares. The price of a share varies according to economic conditions, the performance of the company and investors' attitudes. The first time a company offers its stock for public sale is called an initial public offering (IPO), also known as "going public."
When a business makes a profit, it can share that money with its stockholders by issuing a dividend. A business can also save its profit or re-invest it by making improvements to the business or hiring new people. Stocks that issue frequent dividends are income stocks. Stocks in companies that re-invest their profits are growth stocks.
Brokers buy and sell stocks through an exchange, charging a commission to do so. A broker is simply a person who is licensed to trade stocks through the exchange. A broker can be on the trading floor or can make trades by phone or electronically.
An exchange is like a warehouse in which people buy and sell stocks. A person or computer must match each buy order to a sell order, and vice versa. Some exchanges work like auctions on an actual trading floor, and others match buyers to sellers electronically. Some examples of major stock exchanges are:
- The New York Stock Exchange, which trades stocks auction-style on a trading floor
- The NASDAQ, an electronic stock exchange
- The Tokyo Stock Exchange, a Japanese stock exchange
If you need a broker to help you with your trades, you'll need to choose a firm that offers that service. We'll look at other qualities to look for in an online brokerage next.
Choosing a Broker and Opening an Account

Photo courtesy Pixel Perfect Digital
With a cash account, you buy stocks with the money in your account. With a margin account, you can buy on credit.

Logos are registered trademarks of their respective companies. All rights reserved.
E*Trade, Ameritrade and Charles Schwab are three of the many online brokerages.
- How much money you plan to invest. Most firms require investors to have a certain amount of money to open an account. This is different from a minimum account balance -- although most brokerages have those, too.
- How frequently you plan to make trades. Are you going to buy one stock and hold on to it? If so, you'll need to make sure the brokerage doesn't charge a fee for account inactivity. On the other hand, if you're going to make lots of trades, you'll want a lower fee per trade. Regardless of how much you plan to use your account, you should evaluate how much using the site will cost you.
- Your level of trading experience and how much guidance you need. Some of the least expensive brokerages don't offer much in the way of research or broker-assisted trades. Others, while still moderately priced, offer market analysis, articles on successful trading and help from licensed brokers.
- Any other services you may want. A few trading sites let you buy and sell stocks but not much else. Others are more like major banks, offering debit cards, mortgage loans and opportunities for other investments like bonds and futures.
As with any site that requires your personal and financial information, you should make sure your online broker has good security measures, including automatic logouts and transmission encryption. You should also make sure your brokerage is reputable. The Investing Online Resource Center has a good list of links you can use to make sure your firm is legitimate.
Opening & Funding an Account
When you open an account with a United States online brokerage, you'll answer questions about your investment and financial history. These questions determine your suitability for the account you are requesting -- the brokerage cannot legally allow you access to investments that you cannot reasonably handle. You will also have to provide your address, telephone number, social security number and other personal information. This helps the brokerage track and report your investments according to tax regulations and the PATRIOT Act.
In addition to providing this information, you must make several choices when you create an account. With most brokerages, you can chose between individual and joint accounts, just like at a bank. You can also open custodial accounts for your children or retirement accounts, which are often tax-deferred. Unless you pay a penalty, you can usually retrieve earnings from a retirement account only when you retire.
Next, you must choose between a cash account and a margin account. You can think of a cash account as a straightforward checking account. If you want to buy something using your checking account, you have to have enough money in the account to pay for it. Using a cash account, you have to have enough money to pay for the stock you want.
A margin account, on the other hand, is more like a loan or a line of credit. In addition to the actual cash in the account, you can borrow money from the brokerage based on the equity of the stock you already own, using that stock as collateral. Then, you can buy additional stock. Your margin is the equity you build in your account.
According to the Federal Reserve Board, you must have at least 50 percent of the price of the stock you wish to purchase in your account. In other words, if you want to purchase $5,000 worth of stock, the value of the cash and stock in your account must be at least $2,500. You can borrow the other $2,500 from the brokerage.

- The market value of your stock minus the amount of the loan you took to buy the stock is your equity amount.
- Your equity amount divided by your total account value is your equity percentage.
Margin accounts are definitely more complex than cash accounts, and buying on credit presents additional financial risks. If all of that sounds overwhelming, it's a good idea to stick with a cash account. If you'd like some more examples of how margin accounts work, check out the IORC's Investing Simulator Center.
Finally, you must decide how the brokerage will store your money between trades. Many brokerages offer interest-bearing accounts, so you continue to earn money even when you are not trading.
Once you have made all these choices, you must fund your account. You can make a deposit by check, make a wire transfer to the brokerage or transfer holdings from another brokerage.
When your account is open, you're ready to trade. We'll look at the trading process next.
Once you have made all these choices, you must fund your account. You can make a deposit by check, make a wire transfer to the brokerage or transfer holdings from another brokerage.
When your account is open, you're ready to trade. We'll look at the trading process next.