What Is a Stock Exchange? How the NYSE and NASDAQ Work
A stock exchange is an organized marketplace where people buy and sell shares of publicly traded companies. The two biggest exchanges in the United States, the New York Stock Exchange (NYSE) and the NASDAQ, both connect buyers and sellers, but they do it in different ways.
If you have ever wondered where a stock trade “happens,” this is it. Every time you buy or sell a share through a brokerage app, that order eventually routes to an exchange like the NYSE or NASDAQ, where it gets matched with someone on the other side of the trade.
What Does a Stock Exchange Actually Do?
A stock exchange has three main jobs: it lists companies, it matches buy and sell orders, and it sets prices based on supply and demand.
Think of it like a giant, highly regulated marketplace. Instead of stalls selling fruit or furniture, each “stall” represents a share of a company like a car maker, a bank, or a software business. Prices move up and down all day as buyers and sellers place orders.
Exchanges also enforce rules. Companies that want to list their shares have to meet requirements around finances, reporting, and corporate governance. This oversight is part of why investors generally trust exchange-listed stocks more than shares traded in less regulated settings.
Why Do Stock Exchanges Matter to Beginner Investors?
Exchanges give you a transparent, fair way to buy and sell stock. Prices are public, trades are recorded, and there are rules against manipulation.
Without exchanges, you would have to track down individual buyers or sellers yourself, agree on a fair price, and hope the trade actually goes through. The exchange system removes that friction.
How Does the New York Stock Exchange (NYSE) Work?
The NYSE is the largest stock exchange in the world by the total value of the companies listed on it. It’s based in New York City and has roots going back to 1792, making it one of the oldest exchanges still operating today.
For most of its history, the NYSE ran on a physical trading floor where brokers shouted orders and used hand signals. That floor still exists and is shown on TV during market opens and closes, but most trades today are executed electronically, even ones connected to the NYSE.
The NYSE’s Designated Market Maker System
One thing that sets the NYSE apart is its use of designated market makers (sometimes called specialists). These are firms assigned to specific stocks whose job is to keep trading orderly.
A designated market maker steps in to buy or sell when there’s a temporary imbalance, like when way more people want to sell a stock than buy it. This is meant to reduce sudden, extreme price swings and keep the market functioning smoothly, even during volatile moments.
How Does NASDAQ Work?
NASDAQ (which originally stood for National Association of Securities Dealers Automated Quotations) works differently. It has never had a physical trading floor. It was built from the start as an electronic marketplace, launching in 1971 as the world’s first electronic stock exchange.
Instead of designated market makers tied to individual stocks, NASDAQ uses a network of competing market makers. These are firms and dealers that constantly post buy and sell prices for stocks, and computers match orders automatically based on the best available prices.
NASDAQ is well known for listing technology companies, though it lists businesses across many industries, not just tech.
NYSE vs. NASDAQ: What’s the Difference?
Both exchanges do the same basic job (matching buyers and sellers) but they differ in structure, history, and the types of companies that tend to list there.
| Feature | NYSE | NASDAQ |
|---|---|---|
| Founded | 1792 | 1971 |
| Trading floor | Yes (hybrid, mostly electronic now) | No, fully electronic |
| Market model | Designated market makers | Competing electronic market makers |
| Known for | Large, established companies (banks, industrials) | Tech and growth companies |
| Listing standards | Generally stricter financial requirements | Multiple listing tiers with varying requirements |
In practice, most beginner investors will not notice a difference when they place a trade. Your brokerage app handles the routing, and the exchange details happen behind the scenes.
How Do Companies Get Listed on an Exchange?
A company doesn’t just show up on the NYSE or NASDAQ overnight. It has to apply and meet specific requirements, which usually include:
- Minimum financial thresholds, such as revenue, profit, or market value
- A minimum number of publicly held shares and shareholders
- Corporate governance standards, like having an independent board of directors
- Ongoing reporting requirements once listed, including quarterly financial filings
Once a company meets these standards and completes the listing process (often alongside its initial public offering, or IPO), its shares become available to trade on that exchange.
Are There Other Stock Exchanges Besides NYSE and NASDAQ?
Yes. While the NYSE and NASDAQ dominate U.S. trading, they are far from the only exchanges in the world. Other major exchanges include the London Stock Exchange, the Tokyo Stock Exchange, and the Shanghai Stock Exchange, among many others.
Smaller U.S. exchanges also exist, and some stocks trade on multiple exchanges or through alternative trading systems. As a beginner, you generally don’t need to think about which exchange a stock trades on. Your brokerage handles that automatically when you place an order.
Key Takeaways
- A stock exchange is a regulated marketplace where investors buy and sell shares of public companies.
- The NYSE uses designated market makers and has a hybrid trading floor, while NASDAQ is a fully electronic exchange with competing market makers.
- NASDAQ is known for tech and growth companies, though it lists businesses in many industries.
- Companies must meet financial and governance requirements to get listed on either exchange.
- As an everyday investor, you don’t need to pick an exchange yourself. Your broker routes the trade for you.
Frequently Asked Questions
Is NASDAQ or NYSE bigger?
The NYSE is larger by the total market value of the companies listed on it. NASDAQ, however, lists a large number of well-known technology companies and has grown significantly since it launched.
Can a company be listed on both NYSE and NASDAQ at the same time?
No, a company’s common stock is typically listed on only one primary exchange at a time, though its shares can still be bought and sold through various trading venues and brokers.
Do stock exchanges set stock prices?
Not directly. Prices are set by supply and demand between buyers and sellers. The exchange provides the system that matches those orders and displays the resulting price.
What happens if a company gets removed from an exchange?
This is called delisting. It can happen if a company fails to meet listing requirements, such as maintaining a minimum share price or filing required financial reports on time.
Do I need to know which exchange a stock trades on before I buy it?
No. When you place an order through a brokerage account, the system automatically routes it to the correct exchange or trading venue. You just need to know the stock’s ticker symbol.
