Instruction
The investor defines security, side, quantity, order type, and any price or time condition.
IN THIS COURSE · 5 TOTALCurrent course
01Market Structure02Trading Mechanics03Accounts & Execution04Records, Custody & Shorting05Regulation & Account Operations
GUIDE FOCUS
This guide covers:
- Follow an order through the U.S. market structure.
- The core ownership, venue, pricing, and index concepts behind the U.S. stock market.
- Why ownership is not the same as a guaranteed claim on profits.
RELATED FOUNDATIONS
Review these foundations before moving into the details.
4 SECTIONS · ABOUT 9 MIN
Follow an order through the U.S. market structure
The U.S. stock market is a network of issuers, exchanges, trading venues, brokers, market makers, clearing systems, and indexes. Understanding the roles prevents common errors such as treating an index as an exchange or a ticker as proof of a security’s identity.
QUESTIONS THIS GUIDE ANSWERS
- Where is the security listed and where can the trade actually execute?
- What roles do exchanges, dealers, market makers, and off-exchange venues play?
- How is an index constructed and what does it actually represent?
01SECTION 01 · 2 MINU.S. stock market fundamentals
A stock represents an ownership interest in a corporation. Shareholders may benefit from price appreciation, dividends, voting rights, or corporate actions, but they also bear the risk that the business underperforms or fails. The U.S. stock market is the system through which these ownership interests are issued, quoted, traded, cleared, settled, and held.
U.S. stock market fundamentals
A stock represents an ownership interest in a corporation. Shareholders may benefit from price appreciation, dividends, voting rights, or corporate actions, but they also bear the risk that the business underperforms or fails. The U.S. stock market is the system through which these ownership interests are issued, quoted, traded, cleared, settled, and held.
How the mechanism works
Primary marketCompanies raise capital by issuing new securities, such as an
initial public offering or follow-on offering.
Secondary marketInvestors trade already-issued shares with other investors. Most
everyday stock trading occurs here.
Market priceThe price at which willing buyers and sellers agree to transact.
It reflects available information, liquidity, expectations, and
risk appetite, not a guaranteed estimate of fair value.
Ownership is not the same as a guaranteed claim on profits.
Common shareholders are residual owners. Creditors and preferred claims generally rank ahead of common equity if a company is liquidated.
02SECTION 02 · 2 MINExchanges, OTC markets, and trading venues
The most recognized listing markets are the New York Stock Exchange and Nasdaq. NYSE American is another national securities exchange. Securities may also trade through other registered exchanges, alternative trading systems, internal broker systems, wholesalers, and over-the-counter quotation venues.
Exchanges, OTC markets, and trading venues
The most recognized listing markets are the New York Stock Exchange and Nasdaq. NYSE American is another national securities exchange. Securities may also trade through other registered exchanges, alternative trading systems, internal broker systems, wholesalers, and over-the-counter quotation venues.
How the mechanism works
| Venue | What it does | Investor note |
|---|---|---|
| NYSE | Lists and trades many established U.S. and international companies using electronic systems supported by designated market makers. | A listing venue is not the only place where a listed stock can execute. |
| Nasdaq | Electronic exchange and major listing market with a large concentration of technology and growth companies. | Quotes come from competing market participants and venues. |
| NYSE American | Exchange serving smaller and growing companies and other securities. | Formerly associated with the AMEX name. |
| OTC markets | Dealer-based quotation and trading outside national exchange listings. | Disclosure, liquidity, spreads, and fraud risk may differ substantially; perform additional due diligence. |
U.S. equities operate under a national market system. A broker may route an order to an exchange, market maker, alternative trading system, or another venue, subject to its best-execution obligations and routing arrangements.
03SECTION 03 · 2 MINMajor U.S. market indexes
Indexes are measurement tools, not directly investable products. Index funds and ETFs attempt to track them, but fees, trading costs, taxes, sampling, and timing can create a difference between fund and index returns.
Major U.S. market indexes
Indexes are measurement tools, not directly investable products. Index funds and ETFs attempt to track them, but fees, trading costs, taxes, sampling, and timing can create a difference between fund and index returns.
How the mechanism works
| Index | Construction | What it is commonly used to represent |
|---|---|---|
| Dow Jones Industrial Average | 30 large U.S. companies; price-weighted. | A long-running snapshot of selected blue-chip companies. A higher-priced component has more index influence than a lower-priced one. |
| S&P 500 | About 500 leading U.S. companies; float-adjusted market-cap weighted. | A broad benchmark for large-cap U.S. equities and a common portfolio comparison standard. |
| Nasdaq Composite | Thousands of securities listed on Nasdaq; market-cap weighted. | A broad Nasdaq-listed universe with significant technology exposure. |
An index is a rules-based measurement portfolio, not an investable account by itself. Broad U.S. indexes can differ in eligibility, weighting method, reconstitution schedule, share-count treatment, free-float rules, sector exposure, and how corporate actions are handled. Price-weighted, market-cap-weighted, and equal-weighted indexes can tell different stories even when they contain similar companies. When a fund says it tracks an index, review both the index methodology and the fund’s implementation rather than assuming every “market” benchmark represents the same exposure.
04SECTION 04 · 2 MINPrimary and secondary markets perform different jobs
The primary market is where new securities are issued and capital moves to an issuer or selling security holder under an offering structure. The secondary market is where existing investors trade securities with one another through exchanges and other venues. A company’s share price can move every second in the secondary market without new capital flowing to the company.
Primary and secondary markets perform different jobs
The primary market is where new securities are issued and capital moves to an issuer or selling security holder under an offering structure. The secondary market is where existing investors trade securities with one another through exchanges and other venues. A company’s share price can move every second in the secondary market without new capital flowing to the company.
How the mechanism works
| Market activity | What happens | Investor checks |
|---|---|---|
| IPO | A private company becomes publicly traded through an offering and listing process. | Read the offering document, capitalization, use of proceeds, dilution, lockups, voting structure, risk factors, underwriters, and whether profitability/cash flow support the valuation. |
| Follow-on / secondary offering | A public company may issue new shares, or existing holders may sell shares, or both. | Separate primary shares that raise company capital from secondary shares sold by existing holders. Recalculate diluted share count and per-share economics. |
| Direct listing / other listing route | Existing shares can begin public trading under a structure different from a traditional underwritten IPO. | Understand which shares become tradeable, price discovery, liquidity, lockups, capital raised, and how the listing structure changes supply. |
| Secondary trading | Investors submit orders that interact across exchanges, market makers, ATSs, and other venues. | Focus on order type, session, spread, displayed depth, routing, fill quality, volatility, and settlement. |
In the primary market, newly issued securities raise capital or transfer existing ownership through an offering process; in the secondary market, investors trade existing securities with other market participants. IPOs, follow-on offerings, direct listings, private placements, and debt issuance have different disclosure, allocation, pricing, and dilution considerations. Once trading begins, the company usually does not receive cash from ordinary secondary-market trades. Distinguishing the two markets helps investors understand where proceeds go and why a new issue can change share count.
MARKET CHAIN
Follow the order from investor instruction to execution and settlement
The exchange ticker is only one visible part of the market. A customer order passes through a broker and may interact with an exchange, market maker, alternative venue, or other execution process before the trade is cleared and settled.
Routing
The broker applies its routing and execution process. The venue shown on a quote screen is not necessarily the only place liquidity exists.
Execution
A trade occurs when compatible interest meets under applicable market rules. The last price is not a guarantee of the next execution price.
Settlement
Cash and securities move through post-trade processes after execution. Trade date and settlement date are separate events.
A U.S. stock order can interact with more than one venue
U.S. securities can trade across exchanges and other execution venues, while brokers route customer orders according to their systems and obligations. The consolidated quote and last-sale information do not mean every order is sent to one central marketplace.
Indexes are measurement tools rather than trading venues. A stock can be included in an index while trading on an exchange, and an ETF can seek to track that index while trading as its own security. Keeping issuer, security, venue, and index separate prevents common market-structure confusion.
- Distinguish the company from the security, the venue, and the index.
- Remember that the displayed quote can change while an order is being routed.
- Use order type and limit price to control what the investor can control.
REVIEW POINTS
Review the key points
1. How does an order move through the U.S. market structure step by step?
The U.S. stock market is a network of issuers, exchanges, trading venues, brokers, market makers, clearing systems, and indexes. Understanding the roles prevents common errors such as treating an index as an exchange or a ticker as proof of a security’s identity.
2. How do ownership, trading venues, pricing, and indexes fit together in the U.S. stock market?
A stock represents an ownership interest in a corporation. Shareholders may benefit from price appreciation, dividends, voting rights, or corporate actions, but they also bear the risk that the business underperforms or fails. The U.S. stock market is the system through which these ownership interests are issued, quoted, traded, cleared, settled, and held.
3. Why ownership is not the same as a guaranteed claim on profits.
Common shareholders are residual owners. Creditors and preferred claims generally rank ahead of common equity if a company is liquidated.