How the stock market actually works

Buying a share makes you a part-owner of the business behind it. That claim comes with two practical rights: a share of the profits when the company pays dividends, and a vote on certain company decisions.

You do not own the buildings or the inventory directly. You own a claim on the future earnings of the whole enterprise. That is why earnings, growth and debt matter to a share price: they are the inputs to what the business can eventually pay out.

Companies issue stock to raise money without taking on debt. The first sale, an initial public offering (IPO), puts new shares into the market; after that, most trading happens between investors, and the company sees none of that money.

This distinction explains a common confusion: a stock rising does not put cash in the company’s bank account. What the price does affect is the cost of raising future capital and the value of shares already held by founders and employees.

Every trade has two sides. Alongside individual investors sit pension funds, index funds, market makers and high-frequency firms. Market makers continuously quote both a buy and a sell price, which is what keeps a stock tradable throughout the day.

Prices are set by disagreement: thousands of participants with different time horizons, facts and constraints continuously re-price the same company. A price moving against you means others changed their view, or simply their needs. It does not mean you were wrong.

Over a year, the dominant drivers are earnings and how fast they grow, interest rates, and the health of the sector. Over a single day, headlines, index rebalances and sentiment can dominate: noise that has little to do with the business.

Learning to separate the two timescales is the single most useful habit in this curriculum: fundamentals explain the long run, and price action explains the mood.