Fundamentals
What is a stock?
A stock is a fraction of ownership in a real company. Buy one share and you own a piece (usually a tiny piece) of every desk, factory, contract and brand the company runs. The price moves because the market keeps revising what that whole pie is worth.
6 min read
The idea, in three paragraphs
A stock, also called a share or in some countries an equity, is a unit of ownership in a public company. When a company issues shares to the market, it is dividing its entire business into small, transferable pieces. If a company has issued one hundred shares and you own three of them, you own three percent of that business. The principle is the same whether the business is a small family bakery that has gone public or a global technology firm worth trillions; only the scale changes.
Owning a share is not the same as owning a tangible asset you can carry away. You will not show up at headquarters and walk out with a desk. What you actually own is a claim on the company: a slice of any future profits the company chooses to distribute as dividends, a vote at the annual shareholder meeting, and a residual claim on whatever is left if the company is ever sold or wound down. The price of the share goes up and down because the market continuously argues about what that pie of claims is worth.
Most public companies issue what is called common stock, which carries voting rights and a variable dividend. Some also issue preferred stock, which usually pays a fixed dividend and ranks ahead of common stock if the company is liquidated, but typically without voting rights. For most retail investors most of the time, the relevant kind is common stock. For the rest of this page, when we say "share" we mean a common share unless we say otherwise.
The cake of ownership
First, the metaphor: drag the slider to buy slices of a fictional company that has issued exactly one hundred shares. Then the reality check: how the same fractional-ownership math looks at Apple scale.
Five things to remember
- Owning a stock means owning a piece of a real business. Apple's share price is not a casino chip; it is a continuously revised market estimate of what the whole company (its products, its cash, its brand, its risks) is worth.
- Most retail shareholders own tiny fractions. Three shares of Apple is roughly two-billionths of a percent of the company. That is normal, not a problem; the principle of ownership is unchanged.
- Stock prices reflect what the market collectively thinks the whole pie is worth, divided by the number of slices. When the price moves, somebody changed their mind about the pie, the slices, or both.
- Voting rights come with common shares but most retail investors never vote. The right exists; how seriously you take it is up to you. Many brokers expose proxy voting one click away if you want to use it.
- Dividends are the company's way of sharing realized profit with owners. Not every company pays them. Fast-growing firms tend to keep cash inside the business, and those that do can change the policy at any time.
Why this matters for LATAM investors
For investors in Mexico, Brazil, Colombia, Peru and Chile, most stock exposure happens through US-dollar-denominated brokers and through ADRs (American Depositary Receipts) that wrap a foreign-listed company in a US-tradable shell. That can make foreign-listed shares feel intangible: there is no physical certificate, no Mexican-bolsa ticker on the news, just a number on a screen. Understanding fractional ownership is what keeps that number grounded.
Three threads pull this together. First, holding a stock year after year is what lets the math work in your favour, because compounding rewards time more than timing. Second, buying many stocks at once through a single ETF share is the quickest way for a retail investor to build broad-market exposure without picking individual companies. And third, even if you do prefer single stocks, do not pile into one company or one country. The cleanest LATAM portfolios spread across geographies, asset classes, and company sizes rather than concentrating in a single name.
Four real companies to look at
Familiar single stocks at very different sizes and sectors. Use them as starting points for your own research, not recommendations.
Where to start with single stocks
If you want to go deeper into single-stock picks rather than ETFs, our AI-stocks shortlist is a curated entry point into one of the most actively researched themes today.