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Definition

Stock

A share of ownership in a company, entitling the holder to profits and assets.

Written by Jere Salmisto·Reviewed by CalcFi Editorial·Last verified: 2026-05-13
TL;DR

Stock is A share of ownership in a company, entitling the holder to profits and assets. Used in investing.

What Is Stock?

A stock is a share of ownership in a company. When you buy one share, you own a fractional stake in the company and have claims on a portion of profits (through dividends) and assets. Stocks are issued by corporations to raise capital; stockholders are the owners. Stocks are traded on exchanges (NYSE, Nasdaq) and their prices fluctuate based on company performance, economic conditions, and investor sentiment. Stocks offer growth potential—historically averaging 10% annual returns—but come with volatility and risk. Dividends provide income; capital appreciation provides growth. For long-term investors (10+ years), stocks are appropriate; for shorter timeframes or risk-averse investors, bonds or savings accounts are better. Understanding stock investing is foundational for building wealth.

Related Terms

Equity
The value of ownership in an asset minus any debt owed against it.
Dividend
A portion of company profits distributed to shareholders, usually quarterly.
Market Capitalization
The total market value of a company's outstanding shares.

Related Calculators

Stock Profit Calculator→
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