Everyone has heard the word "stock", but the picture behind it tends to be hazy - numbers running across a screen with someone making or losing money on them. The reality is far more tangible. This article explains what a stock really is, why its price keeps moving, and what happens step by step when you buy one.
A stock is a stake in a real company
A company that wants to grow needs capital. One way to raise it is to divide itself into many small stakes - shares - and sell them to the public. Whoever buys a share becomes a shareholder: a co-owner of the company, even if only of a tiny fraction.
This is not a figure of speech. If you own a share of a carmaker, a corresponding piece of its factories, its brand, and its future profits belongs to you. The stake comes with concrete rights:
- A share in the profit. If the company decides to pay out part of its profit to shareholders, you receive a dividend - the same amount for every share you hold.
- Voting rights. At the general meeting you vote on the company's fundamental questions; the weight of your vote matches the number of your shares.
- A share in the assets. If the company's value grows, the value of your stake grows - and vice versa.
At the same time, a shareholder bears business risk: nobody guarantees a dividend, or that the stock can be sold for more than it was bought. That is what distinguishes a stock from a bond, where you are a creditor with agreed interest. A shareholder is an owner - with all the good and bad that comes with it. But shareholders are not liable for the company's obligations: they can never lose more than the amount they invested.
Why a stock price fluctuates
A stock's price is not set by the company, the exchange, or any authority. At every moment it emerges from the clash of supply and demand: when more people want to buy than sell, the price rises; when sellers dominate, it falls. There is nothing more behind the movements on the screen.
The more interesting question is why supply and demand keep changing. The answer: the market does not trade the past, it trades expectations. A stock's price reflects what thousands of investors think about the company's future profits. Every new piece of information - earnings results, a new product, a change in interest rates, a crisis in the industry - shifts those expectations, and with them the price. That is why a stock can fall even after good results: they were good, but the market expected even better.
Short-term movements are largely noise - moods, speculation, reactions to headlines. Over the long run, though, the price tracks the company's business: a company that grows its revenue and profits for years tends to be valued higher over time. Price fluctuation is thus a normal sign of a functioning market, not a sign that something is wrong. And the price by itself does not tell you whether a stock is expensive or cheap - for that you need to compare it with the company's value, which is exactly the job of the Fair Price Index.
How the stock exchange works
An exchange is an organized marketplace where the orders of buyers and sellers meet. The best known include the NYSE and Nasdaq in New York; Prague has the Prague Stock Exchange. The exchange itself buys and sells nothing - it provides the rules, matches orders, and ensures the trade is fair to both sides.
As a retail investor you cannot reach the exchange directly. Your order is delivered by a broker - a licensed intermediary with whom you hold an investment account. The broker sends the order to the exchange, where it is matched with a counterparty; the purchased shares are then recorded in your client account. They are your property - the broker merely holds them.
An exchange has trading hours. The US exchanges trade on business days from 9:30 a.m. to 4:00 p.m. New York time, which is usually 3:30 p.m. to 10:00 p.m. Central European time; the Prague exchange trades during the day in local hours. Outside these hours there is normally no trading - when a company releases important news in the evening, the market only absorbs it at the next open, and the stock can open with a jump higher or lower.
Every stock has its ticker on the exchange - a short code of a few letters that unambiguously identifies it in the trading system. The ticker serves you too: it is how you find the stock at your broker, in the news, and in tools such as the stock screener.
What really happens when you buy a stock
Say you have decided to buy one share of a specific company. The whole process looks like this:
- You place an order with your broker. You pick the stock by its ticker, choose the number of shares and the order type - either buying immediately at the current market price, or with a limit, the maximum price you are willing to pay.
- The broker sends the order to the exchange. There it is matched with the order of someone who is selling at that moment. Important: you are buying from another investor, not from the company. The company received money only when the shares were first issued; ordinary daily trading is an exchange between investors and does not touch the company's finances at all.
- The trade executes. For liquid stocks, within a fraction of a second. The price of the share plus any trading fee is deducted from your brokerage account.
- Settlement takes place. The transfer of ownership is formally completed usually within one business day. The share appears in your account - and from the moment the trade executed, you are a shareholder with all the rights that entails.
From that moment on, the value of your investment moves with the stock's price on the exchange. There is nothing more you need to do: dividends arrive in your brokerage account automatically, and you can sell the stock the same way at any time during trading hours.
Summary
A stock is a stake in a real company - with a right to profit, a vote, and a share of the assets, but with no guarantees. Its price emerges from the clash of supply and demand and fluctuates because the market constantly re-evaluates its expectations of the future. The exchange is an organized marketplace with fixed hours where your broker carries your orders, and the ticker is the name under which you find the stock. And in an ordinary purchase you buy from another investor, not from the company. Once you understand this, you stop seeing running numbers - and start seeing pieces of companies changing hands.