Before getting into stocks, bonds, indices, or how to open a brokerage account, you need to understand where any of this actually happens. When someone says they "bought a stock," where exactly did they buy it, who did they buy it from, and who makes sure the transaction is even valid? The short answer is a stock exchange. This lesson is the starting point of the series, and it explains what an exchange is, why it exists, and what role it plays in the broader economy.
A Stock Exchange Is a Regulated Marketplace
Picture a farmers market in your town. There's a fixed location, set opening hours, rules about who can sell and what they can sell, and an inspector who makes sure the scales aren't lying. A stock exchange is the same idea, except the goods aren't vegetables. They're securities: stocks, bonds, ETFs, and other financial instruments.
The simple definition: an exchange is a regulated marketplace where buyers and sellers of securities come together. Trading happens through electronic systems, there are clear rules about how prices are set, and a regulator oversees the whole thing. In Israel, that regulator is the Israel Securities Authority. We'll cover it in more detail in the next lesson.
Why Companies Decide to Go Public
A growing company needs money. It can borrow from a bank, find a single large private investor, or turn to the general public. Turning to the public is called an IPO, short for Initial Public Offering. In an IPO, the company offers to sell a piece of itself, in the form of shares, to the public. In return, the company receives capital.
There are three main reasons a company chooses this path.
The first is raising capital. Instead of borrowing from one large bank, the company raises money from thousands of small investors at once. Each investor contributes a relatively small amount, but together they form serious funding that lets the company expand operations, enter new markets, or develop new products.
The second is liquidity for early stakeholders. Founders, early employees, and venture capital funds invested years in the company. Without a public market, they have no orderly way to turn their stake into cash. Going public gives them an exit path.
The third is visibility and credibility. A public company files quarterly reports, trades under a known ticker, and shows up in the press. That helps it negotiate better terms with customers, suppliers, and lenders.
How Money Actually Moves From the Public to the Company
Here's a critical distinction beginners miss. There are two markets running in parallel: the primary market and the secondary market.
The primary market is the IPO itself. The company issues new shares, the public buys them, and the cash goes directly into the company's bank account. This is the moment the company actually raises capital. If a company issues one million shares at $50 each, it receives $50 million minus underwriting fees.
The secondary market is everything that happens after the IPO. When investor A sells a share to investor B, the company itself does not see a single cent from that trade. The money flows from one investor to another. The company already got its cash back at the IPO. Almost everything you read in the news, like "Company X's stock rose 3% today," is happening in the secondary market. Investors are simply swapping ownership with each other.
This matters. When you buy a stock through your brokerage app, in 99% of cases you're buying in the secondary market, from another investor who's selling. The company itself receives nothing from your purchase.
Who Is on the Other Side of Your Trade
When you tap "buy" in your app, someone else somewhere is tapping "sell" at that same moment. Who are those people?
Retail investors. Regular people like you and me, deciding to buy or sell. Their share of daily trading volume varies, but they're always in the mix.
Institutional investors. Pension funds, insurance companies, mutual funds, and provident funds. These are large players managing money on behalf of millions of individuals. If you have a pension, some of your money is probably being managed right now by an institution that's actively buying and selling securities on an exchange.
Market makers. Firms that commit to always quoting both a buy price and a sell price for a given security, even when nobody else wants to trade it. They provide liquidity. Without them, you might want to sell a stock and find no buyer at all on the other side. The market maker stands ready to buy from you, then tries to sell on at a small profit.
Speculators and algorithmic traders. Players trying to profit from short-term price moves, often through automated algorithms. They add trading volume and help prices update quickly as new information arrives.
Why a Centralized Exchange Exists at All
In the internet era you might think people could just trade with each other directly, no middleman needed. Why have a central institution? A few overlapping answers.
Price discovery. When thousands of buyers and sellers meet in one place, a price emerges that reflects all available information. It's not a perfect price, but it's far more reliable than a price negotiated privately between two strangers.
Regulation and transparency. The exchange forces companies to file reports, disclose material events, and follow disclosure rules. Without that, a small investor would have no chance against people with inside knowledge of the company.
Settlement guarantees. When a trade happens on an exchange, there's a clearing mechanism that makes sure the buyer actually receives the shares and the seller actually receives the money. This sounds obvious, but in a private trade between two strangers there's a real risk that one side runs off with the cash or fails to deliver the shares. The exchange and its clearinghouse remove that risk.
Accessibility. Without exchanges, only very wealthy people with the right connections could invest in companies. With exchanges, anyone with a brokerage account can buy a small piece of a large business.
How This Connects to Your Money
Here's the simplest way to picture the whole thing.
Your salary lands in your bank. The bank doesn't let that money sit. It lends part of it out, some to other individuals as mortgages or personal loans, some to businesses. At the same time, some companies don't want to borrow from a bank. They prefer to raise capital directly from the public. So they list shares on an exchange. Whoever buys those shares becomes a partial owner of the company.
When you invest through an exchange, you're essentially skipping the bank as a middleman and connecting your savings directly to a company. You take on more risk, but you also get a share of the upside if the company does well.
In the next lesson we'll dive into our specific exchange, the Tel Aviv Stock Exchange, and see what makes it distinct on the global map.