Financial Dictionary
Equity
1. Stock or any other security representing an ownership interest.
2. On the balance sheet, the amount of the funds contributed by the owners (the stockholders) plus the retained earnings (or losses). Also referred to as "shareholder's equity".
3. In the context of margin trading, the value of securities in a margin account minus what has been borrowed from the brokerage.
4. In the context of real estate, the difference between the current market value of the property and the amount the owner still owes on the mortgage. Thus, it is the amount, if any, the owner would receive after selling a property and paying off the mortgage.
Investopedia Commentary
Equity is a term whose meaning depends very much on the context. In general, you can think of equity as ownership in any asset after all debts associated with that asset are paid off. For example, a car or house with no outstanding debt is considered the owner's equity since he or she can readily sell the items for cash. Stocks are equity because they represent ownership of a company, whereas bonds are classified as debt because they represent an obligation to pay and not ownership of assets.
Related Links
Stock Basics Tutorial
Keep Your Eyes On The ROE
Margin Trading Tutorial
To Rent or Buy? The Financial Issues - Part 1
See also: Asset, Balance Sheet, Private Equity, Stock, Stockholder's Equity