What is Stocks?

An instrument that signifies an ownership position (called equity) in a corporation, and represents a claim on its proportional share in the corporation's assets and profits. Ownership in the company is determined by the number of shares a person owns divided by the total number of shares outstanding. For example, if a company has 1000 shares of stock outstanding and a person owns 50 of them, then he/she owns 5% of the company. Most stock also provides voting rights, which give shareholders a proportional vote in certain corporate decisions. Only a certain type of company called a corporation has stock; other types of companies such as sole proprietorships and limited partnerships do not issue stock. also called equity or equity securities or corporate stock.

Top things to know

Source: CNN.COM

1. Stocks aren't just pieces of paper.

When you buy a share of stock, you are taking a share of ownership in a company. Collectively, the company is owned by all the shareholders, and each share represents a claim on assets and earnings.

2. There are many different kinds of stocks.

The most common ways to divide the market are by company size (measured by market capitalization), sector, and types of growth patterns. Investors may talk about large-cap vs. small-cap stocks, energy vs. technology stocks, or growth vs. value stocks, for example.

3. Stock prices track earnings.

Over the short term, the behavior of the market is based on enthusiasm, fear, rumors, and news. Over the long term, though, it is mainly company earnings that determine whether a stock's price will go up, down, or sideways.

4. Stocks are your best shot for getting a return over and above the pace of inflation.

Since the end of World War II, the average large stock has returned, on average, more than 10 percent a year - well ahead of inflation, and the return of bonds, real estate and other savings vehicles. As a result, stocks are the best way to save money for long-term goals like retirement.

5. Individual stocks are not the market.

A good stock may go up even when the market is going down, while a stinker can go down even when the market is booming.

6. A great track record does not guarantee strong performance in the future.

Stock prices are based on projections of future earnings. A strong track record bodes well, but even the best companies can slip. For example, Internet router company Cisco Systems was considered a great stock to own during the technology boom of the late 1990's and early 2000; but shares lost more than 75 percent of their value over the following five years.

7. You can't tell how expensive a stock is by looking only at its price.

Because a stock's value is depends on earnings, a $100 stock can be cheap if the company's earnings prospects are high enough, while a $2 stock can be expensive if earnings potential is dim.

8. Investors compare stock prices to other factors to assess value.

To get a sense of whether a stock is over- or undervalued, investors compare its price to revenue, earnings, cash flow, and other fundamental criteria. Comparing a company's performance expectations to those of its industry is also common -- firms operating in slow-growth industries are judged differently than those whose sectors are more robust.

9. A smart portfolio positioned for long-term growth includes strong stocks from different industries.

As a general rule, it's best to hold stocks from several different industries. That way, if one area of the economy goes into the dumps, you have something to fall back on.

10. It's smarter to buy and hold good stocks than to engage in rapid-fire trading.

The cost of trading has dropped dramatically -- it's easy to find commissions for less than $10 a trade. But there are other costs to trading -- including mark-ups by brokers and higher taxes for short-term trades -- that stack the odds against traders. What's more, active trading requires paying close, up-to-the-minute attention to stock-price fluctuations. That's not so easy to do if you've got a full-time job elsewhere. And it's especially difficult if you are a risk-averse person, in which case the shock of quickly losing a substantial amount of your own money may prove extremely nerve-wracking.