What Is a Stock? Ownership Explained
A stock is a unit of ownership in a company. Its market price changes as buyers and sellers respond to expected future outcomes.
Start with the fundamentals, learn to assess uncertainty and use primary sources to understand your financial decisions.
A stock is a unit of ownership in a company. Its market price changes as buyers and sellers respond to expected future outcomes.
Stock exchanges and brokers help buyers and sellers trade ownership interests, with market rules governing how orders are handled.
An exchange-traded fund pools investments into a portfolio and its shares generally trade on an exchange.
A dividend is a distribution that a company may pay to shareholders, typically from available funds.
Market capitalization is the market value of a company's outstanding equity shares, commonly estimated as share price multiplied by shares outstanding.
The price-to-earnings ratio compares the price of a share with earnings per share over a defined period.
A Form 10-K is an annual report that many US public companies file with the SEC, containing business, risk and audited financial information.
Dollar-cost averaging means investing a fixed amount on a regular schedule, regardless of market movements.
Stock prices move as trades occur at changing prices and expectations about future company results and risks evolve.
An index fund seeks to track a specified market index, usually through a mutual fund or exchange-traded fund.
A bond is a debt security through which an investor lends money to an issuer under specified terms.
ETFs and mutual funds can both pool investments, but their trading mechanics and fees can differ.
Risk tolerance concerns how much uncertainty someone can emotionally accept; risk capacity concerns their financial ability to absorb losses.
A stop order can trigger an instruction to buy or sell when a specified price is reached, depending on the broker and order type.
Trading volume measures the amount of shares or contracts traded over a specified time interval.
Inflation describes a general increase in prices over time, reducing purchasing power when income or assets fail to keep pace.
Changes in interest rates can influence borrowing costs, consumer demand and how investors value future business cash flows.
Diversification means spreading financial exposure across assets that do not all behave exactly the same way.
Rebalancing means adjusting portfolio weights after market movements or changes in goals and circumstances.
Investment fraud often involves misleading claims, pressure, impersonation or promises of unusually reliable returns.