What Is a Security in the Stock Market?

A security is an investment instrument, not another word for a stock. Stocks are securities that represent ownership in a company. Bonds are debt securities: an investor lends money to an issuer under stated repayment terms. Mutual funds and exchange-traded funds pool investors' money and hold portfolios of securities or other assets. The SEC lists stocks, bonds, and funds as different investments, each with risks.

What does owning a stock mean?

A common share gives you an ownership interest in the issuing company and a claim on its results according to the share's terms. Its market price can rise or fall; dividends, if any, are not guaranteed. A preferred share has different payment and voting rights specified by the issuer. Neither type makes you a lender to the company. Before buying an individual stock, read what the business does, its risks, and its financial statements rather than relying on a share-price chart alone.

How are bonds and funds different?

A bond is generally a promise by a government, company, or other issuer to pay interest and repay principal under the bond's terms; default and interest-rate risk still matter. A fund share represents an interest in a pool of holdings, which can include stocks, bonds, or both. Owning a fund can make diversification easier, but a narrowly focused fund may still be concentrated. Our beginner investing guide explains how to compare broad funds, risk, and fees.

Where can you check a public company?

The SEC's free EDGAR database provides company filings. Start with the annual Form 10-K: the business, risk factors, management discussion, and audited financial statements help you understand what you would own. A security being registered or traded does not guarantee a profit or make it suitable for your goal.