Stock Basics · Lesson 1/7 · 5 min read

What Is a Stock?

A Stock Is a Piece of Ownership in a Company

In one sentence, a stock (or share) is a small slice of ownership in a company. Say a company decides to raise money by splitting its total value into 10 million pieces. Each of those pieces is one share. If you own 100 shares, you own 100 out of 10 million — 0.001% of that company — and that makes you a shareholder.

That might sound abstract, but actually owning a piece of a company means two concrete things:

When the company does well, your slice becomes worth more. If the company grows and becomes more valuable, the value of your shares — the pieces that make up that company — grows right along with it.
When the company shares its profits, you get a cut. This is called a dividend.

Two Ways to Make Money From Stocks

Stock investing returns generally come from two sources:

Capital gains: Buying low and selling high, and pocketing the difference. This is what most beginners think of first.
Dividends: A portion of the company's profits paid out directly to shareholders in cash. Not every company pays dividends — some companies, especially growth companies, choose to reinvest all their profits back into the business instead.

💡 Tip: A company paying dividends is often read as a signal that it's generating stable, consistent profits. But not paying dividends doesn't necessarily mean the company is doing poorly — it might just be reinvesting to grow faster instead.

Why Do Companies Issue Stock?

From the company's side, the reason is simple: to raise money without taking on debt. Borrowing from a bank means paying interest and eventually repaying the principal. Issuing stock raises money with no repayment obligation — but in exchange, the company gives up a slice of ownership to investors.

The first time a company sells shares to the public is called an IPO (Initial Public Offering). After that, investors trade shares among themselves on an exchange. It's worth remembering that when you buy a stock after the IPO, your money doesn't go to the company — it goes to whoever sold you those shares (post-IPO trading is investor-to-investor).

Rights That Come With Owning Stock

Owning stock isn't just about watching a price move up and down. It comes with real rights.

Right	What it means
Voting rights	Vote on major company decisions (like electing directors) at shareholder meetings
Right to dividends	Receive dividends proportional to your shares, if the company declares them
Right to residual assets	If the company is liquidated, receive a proportional share of what's left after debts are paid
Preemptive rights	Priority to buy new shares before outside investors, when the company issues more stock

A handful of shares won't give an individual investor real influence over how a company is run, but these rights are what make it true that you actually own a piece of the company — not just a number on a screen.

How Stocks Differ From Other Investments

When you're new to investing, it's easy to mix up stocks, bonds, and savings accounts. Here's a quick comparison:

Savings account: You deposit money with a bank and earn a fixed interest rate. Almost no risk of losing principal, but low expected return.
Bonds: You "lend" money to a company or government and receive fixed interest. Unlike stocks, bonds don't come with ownership — but bondholders get paid back before shareholders if the company goes bankrupt.
Stocks: Actual ownership in the company. No fixed return — the value can swing significantly based on the company's performance — but the potential upside is also the highest of the three.

⚠️ Note: Higher potential return means higher potential risk. If a company goes bankrupt, shareholders get paid after creditors, which means in the worst case, you could lose your entire investment.

Common Stock vs. Preferred Stock

Browse listings on a brokerage app and you'll sometimes see two versions of the same company — one plain, one labeled "preferred." Everything we've discussed so far has been about common stock. Preferred stock is a different class entirely.

Common stock: Comes with voting rights; dividends can vary depending on how the company is doing.
Preferred stock: Usually has no voting rights, but receives dividends ahead of common stockholders (and often at a somewhat higher fixed rate).

Preferred shares often trade at a lower price than common shares of the same company, for two overlapping reasons: no voting rights, and typically much lower trading volume (lower liquidity), which makes them less convenient to buy and sell. Some investors buy preferred stock purely for the dividend income, but as a beginner, it's best to first understand the market through common stock.

Even after the IPO described above, a company that needs more capital can issue additional new shares (a secondary offering). For existing shareholders, this creates something called dilution.

For example, say a company has 1 million total shares outstanding, and you own 10,000 of them (1%). If the company issues 250,000 new shares, total shares outstanding become 1.25 million. You still own the same 10,000 shares, but your ownership stake drops from 1% to 0.8% (10,000 ÷ 1,250,000). If the company doesn't create an equivalent amount of real additional value with that new capital, your ownership percentage has simply been diluted.

💡 This dilution concern is a big part of why stock prices often wobble in the short term on news of a secondary offering. Whether it's ultimately positive or negative long-term depends on what the company does with the money — paying down debt versus funding a new growth initiative can lead to very different outcomes.

Summary

A stock is a piece of ownership in a company, split into small units.
Returns come from two channels: capital gains and dividends.
Companies issue stock to raise money without debt, giving up a slice of ownership in return.
Shareholders get real rights — voting, dividends — but also carry the risk that comes with the company's performance.

In the next lesson, we'll look at where and how stocks are actually bought and sold — the structure of exchanges and markets.