Stocks & Equities · definition
Stock (Equity)
A stock is a security that represents partial ownership of a company. Owning shares entitles the holder to a slice of the company's assets and profits, proportional to the number of shares held.
A stock, also called a share or equity, is a security that represents partial ownership of a company. If a company has issued one million shares and you own ten thousand of them, you own one percent of that business: one percent of its profits, one percent of the votes at its shareholder meetings, and a claim on one percent of whatever remains if the company is ever wound up after creditors are paid.
That one idea, slicing a business into transferable pieces, is the foundation of modern capital markets, and it is older than most people guess.
Key takeaways
- A share is a unit of ownership in a company; shareholders are owners, not lenders.
- Shareholders can earn through price appreciation and through dividends, when the board declares them.
- Common stock usually carries voting rights; preferred stock usually has payment priority instead.
- Equity holders stand last in line in a bankruptcy, behind every creditor, which is the structural reason stocks are riskier than bonds.
- The long-run record of broad stock indexes is strong on average and violent in the short term; both halves of that sentence are part of the definition of equity risk.
Four centuries of shares
The world's first publicly traded company was the Dutch East India Company (VOC), which sold shares to the public in Amsterdam in 1602 to finance its fleets; the Amsterdam exchange that grew around that trade is considered the world's oldest stock market. The model spread because it solved two problems at once: companies could raise permanent capital without repayment dates, and investors could exit by selling to someone else instead of waiting for the venture to end. Everything since, from the New York Stock Exchange (founded under a buttonwood tree in 1792, by legend) to app-based brokers, is plumbing built around that same trade.
Why companies issue stock
Companies sell shares to raise money without borrowing. The first public sale, the initial public offering (IPO), moves a company onto an exchange; later share sales (secondary offerings) raise more capital but dilute existing owners, since the same business is now cut into more slices. Dilution is a permanent feature of equity life: stock-based employee pay, convertible bonds and acquisition currency all add shares over time, which is why analysts track per-share figures rather than company totals.
After the IPO, daily trading happens entirely between investors. The company receives nothing when its shares change hands; prices move purely on supply and demand.
Common, preferred, and share classes
| Type | Votes | Dividends | Typical holder |
|---|---|---|---|
| Common stock | Usually yes | Variable, board decides | Most investors |
| Preferred stock | Usually no | Fixed, paid before common | Income-focused, institutions |
| Dual-class (e.g. A/B shares) | Unequal by design | Same economics, different control | Founders vs public |
Dual-class structures deserve a note because they are common among technology companies: Alphabet's class B shares (10 votes each) keep founder control while class A (1 vote) and class C (no votes) trade publicly. Berkshire Hathaway's A and B shares differ in size and voting weight rather than economics. The lesson is general: "one share, one vote" is a default, not a law of nature, and the prospectus is where the actual rights live.
How a price comes about
On an exchange, a share's price is simply the last price at which a buyer and seller agreed. Beneath that number sits an order book: bids (offers to buy) and asks (offers to sell) at different prices, with the gap between the best of each being the spread, a direct measure of liquidity. News moves prices by moving what people are willing to pay: earnings, interest rates, the economic cycle, and sentiment all flow into the book. Multiplying price by shares outstanding gives market capitalization, and ratios such as the price-to-earnings ratio describe how a price relates to profits.
What owning a share gets you, and what it does not
Common shareholders typically vote on directors, mergers and major policies, receive dividends when declared, and may buy new shares in some markets before outsiders (pre-emption rights, standard in Europe, rare in the US). What ownership does not include: any guaranteed payment, any right to demand money back from the company, or any protection of the price paid.
The downside boundary is real. In bankruptcy, the law pays secured creditors, then unsecured creditors and bondholders, and only then shareholders, who in large failures usually receive nothing: Lehman Brothers equity (2008) and Enron equity (2001) ended at zero while some creditors recovered part of their claims. Delisting, nationalisation and dilution in rescue financings are milder versions of the same lesson.
The long run, with honest footnotes
Broad US stock indexes have returned roughly 10% per year on average in nominal terms since 1926 (about 7% after inflation), the most quoted figure in equity writing. Three footnotes keep it honest. First, the average contains crashes of 50% and more; nobody earns the average without sitting through the bear markets. Second, the US is history's best-performing major market; global studies (Dimson, Marsh and Staunton's yearbook) find lower long-run returns in most other countries, so the US series is a ceiling more than a baseline. Third, those returns assume reinvested dividends, as explained under dividend. The record describes the past; it makes no appearance in any promise about the future.
Frequently asked questions
What is the difference between a stock and a share?
In daily usage, nothing. Strictly, "stock" is ownership in companies generally and a "share" is the countable unit: you hold 100 shares of stock.
Do all stocks pay dividends?
No. Dividends are a board decision, and many companies, especially fast growers, retain every dollar to fund expansion. Berkshire Hathaway has famously paid one dividend in six decades.
Can a share price go to zero?
Yes, in bankruptcy or fraud. It cannot go below zero: a shareholder's loss stops at the amount invested, unlike some derivative and short-selling positions.
What are blue-chip stocks?
An informal label for large, established companies with long records. The name comes from poker, where blue chips carried the highest value.
Sources
This entry is for education only. Investing Value describes how financial concepts work; it does not provide investment, tax or legal advice, and nothing here is a recommendation to buy or sell any asset.