Investing is the act of acquiring resources in order to generate a return. When people

discuss investing now, they are usually talking about one of two major ways of investing:

through debt or through equity. You can invest in debt by purchasing bonds, either from a

company or the U.S. Treasury. You can invest in equity by purchasing stocks on a stock


In general, investing in equity is riskier than investing in debt. If a company ceases to

exist, whether through bankruptcy or otherwise, its assets get distributed across its debtholders

and equity holders. Since all debt has a defined value, while equity is simply a portion of the

business, debtholders are paid first. Equity holders have a residual claim on the company’s

assets. This is why equity is more risky than debt; because equity holders aren’t guaranteed to

be paid. However, this also means that investors will expect a higher return from equity, since

there is more risk involved.

Note that so far, we have only discussed accounting equity, or book value of equity. This

is the number on a company’s balance sheet that makes the math and accounting work out. On

the other hand, investors usually trade on the secondary market, where shares of a company

are assigned values by investors.

When investors invest in equities, they hope to predict the “true value” of a company.

They do this by attempting to predict what the book value of equity will be in the future. This

means that stocks will rarely equal the actual book value of equity for a company.

Investing in stocks requires that you trade on a stock market. In the US, the two major

stock exchanges are the New York Stock Exchange (NYSE) and the Nasdaq. On average,

stocks tend to grow in value over time. A common estimate for how the market is doing is the

S&P 500, which measures the stock performance of the 500 largest companies listed on stock

exchanges in the US.

Investors in hedge funds or asset management companies will look to beat the market,

or achieve a higher return than the market. While it can be simple to make money on the market

by simply investing in an index fund, it is not easy to beat the market. In order to beat the market, you have to invest in stocks that you believe are undervalued. It is hard to find these stocks, because active investors are doing the same exact thing every day, and once an undervalued stock is discovered, people will buy more of it, driving stock price up and no longer making it undervalued. The idea that stocks are almost always fairly valued is called the