Markets & Trading·Market Structure

Market Structure

Primary vs. Secondary Market

Understanding where and how securities are created and traded is foundational to the Series 7.

Primary market: Where securities are first issued. The company (or government entity) sells newly created securities directly to investors, and the proceeds go to the issuer. An IPO (Initial Public Offering) is a primary market transaction. When Uber went public in 2019 and sold shares to investors for the first time, that was a primary market transaction -- Uber received the money.

Secondary market: Where previously issued securities trade between investors. When you buy Apple stock on NASDAQ today, Apple receives nothing. You are buying from another investor who already owned those shares. The NYSE and NASDAQ are secondary markets. All day-to-day stock trading occurs in the secondary market.

Key distinction: Primary market = issuer gets the money. Secondary market = investors trade among themselves.

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NYSE: The Auction Market

The New York Stock Exchange (NYSE) is an auction market (also called an agency market). Key features:

  • Buyers and sellers submit orders that are matched by price and time priority
  • Designated Market Makers (DMMs), formerly called specialists, are assigned to specific stocks
  • DMMs maintain a fair and orderly market -- they must buy when no one else will and sell when no one else will, using their own inventory if necessary
  • Physical trading floor at 11 Wall Street (though most trading is now electronic)
  • DMMs earn compensation from the bid-ask spread for providing liquidity
  • Real-world example: On a volatile day when no investor wants to buy XYZ stock, the DMM steps in and buys at the prevailing price, preventing a disorderly price collapse.

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    NASDAQ: The Dealer Market

    NASDAQ is a dealer market (also called a negotiated market). Key features:

  • No physical trading floor -- all electronic
  • Multiple market makers compete to trade each stock (unlike NYSE's one DMM per stock)
  • Market makers maintain bid and ask quotes and trade from their own inventory
  • Bid (price they will buy at) and Ask (price they will sell at) -- the spread is their profit
  • Originally designed for smaller growth companies; now hosts mega-cap tech firms (Apple, Microsoft, Amazon)
  • Real-world example: For AAPL stock, 10+ competing market makers all post bids and asks simultaneously on NASDAQ. Competition among market makers generally keeps spreads narrow.

    Agency vs. Principal trades:

  • Agency (agent): Broker executes on behalf of the customer, earning a commission. The broker does not take the other side of the trade.
  • Principal (dealer): Broker-dealer takes the other side of the trade from their own inventory, earning the bid-ask spread. Disclosure required when acting as principal.
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    OTC Markets: Pink Sheets and OTCBB

    Over-the-Counter (OTC) markets handle securities not listed on formal exchanges.

    OTC Bulletin Board (OTCBB): Electronic quotation system for unlisted securities with some SEC-reporting requirements.

    Pink Sheets (OTC Pink): For securities not required to file with the SEC; minimal disclosure requirements; includes many small, speculative, and foreign companies. Named for the pink paper on which quotes were historically printed.

    Key risks of OTC/Pink Sheet stocks:

  • Limited information about the company
  • Wide bid-ask spreads (low liquidity)
  • Subject to manipulation and fraud
  • Not subject to exchange listing standards
  • Not suitable for most retail investors
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    ECNs, ATS, and Dark Pools

    Electronic Communication Networks (ECNs): Computerized systems that automatically match buy and sell orders without human intervention. ECNs often operate after regular market hours, enabling extended-hours trading.

    Alternative Trading Systems (ATS): SEC-regulated platforms (Reg ATS) that match buyers and sellers but are not registered as national securities exchanges. Includes ECNs and dark pools.

    Dark pools: Private trading venues where large institutional orders can be executed anonymously without displaying them in the public market. Benefits: reduced market impact for large orders. Concerns: opacity, potential for conflicts of interest, and reduced price discovery for the broader market.

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    The IPO Process

    When a company raises capital for the first time through a public stock offering:

    1. Select underwriters: The company hires an investment bank (or syndicate of banks). The lead underwriter is called the book runner.

    2. File registration statement (S-1) with the SEC: Includes audited financials, business description, risk factors, and use of proceeds. During the SEC review period, the company may distribute a preliminary prospectus (red herring) to gauge interest. Cannot make sales during this period.

    3. Road show: Management and underwriters present to institutional investors and build the order book. Retail investors typically cannot participate.

    4. Pricing: Based on the order book, the underwriters and company agree on the offering price. The effective date is when the SEC declares the registration effective.

    5. Allotment and distribution: Underwriters allocate shares.

    6. Trading begins: Once shares are distributed, secondary market trading begins.

    Firm commitment: Underwriter purchases all shares from the issuer and assumes the risk of selling them. Most common IPO structure.

    Best efforts: Underwriter tries to sell as many shares as possible but does not guarantee the full amount.

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    Key Terms

  • Primary market: Where newly issued securities are sold; issuer receives proceeds
  • Secondary market: Where existing securities trade between investors
  • NYSE: Auction/agency market; DMMs maintain fair and orderly markets
  • NASDAQ: Dealer/negotiated market; competing market makers; all electronic
  • DMM (Designated Market Maker): Assigned to specific NYSE stocks; obligated liquidity provider
  • Market maker: NASDAQ dealer who posts bids/asks and trades from own inventory
  • OTC/Pink Sheets: Unlisted securities with minimal disclosure; higher risk
  • ECN: Electronic platform matching buy/sell orders automatically
  • Dark pool: Private venue for anonymous large-order execution; no pre-trade transparency
  • IPO: Initial Public Offering; company's first public sale of stock
  • Red herring: Preliminary prospectus; cannot be used to sell securities
  • Road show: Pre-IPO investor meetings to build the order book
  • Firm commitment: Underwriter guarantees the issuer will receive funds

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Quiz Questions:

Q1. An investor buys 1,000 shares of a stock on the NYSE the day after its IPO completed. Which market did this transaction occur in?

A) Primary market, because it was an IPO B) Secondary market, because the investor bought from another investor, not the issuer C) Primary market, because the NYSE is a primary exchange D) OTC market, because IPO shares are not listed for 30 days

Answer: B -- Once IPO shares begin trading on an exchange, all subsequent purchases are secondary market transactions. The company received money only during the initial IPO (primary market). The NYSE is always a secondary market venue. There is no 30-day waiting period for exchange trading (D is wrong).

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Q2. A broker-dealer executes a customer's order by selling shares to the customer from the firm's own inventory. The broker-dealer is acting as a:

A) Agent, earning a commission B) Principal (dealer), earning the bid-ask spread C) Market maker on a national exchange D) Underwriter in a primary offering

Answer: B -- When a broker-dealer trades from its own inventory (buys or sells to a customer using its own holdings), it acts as a principal or dealer. The firm profits from the bid-ask spread, not a commission. When acting as principal, the firm must disclose this to the customer. Acting as agent (A) means the firm facilitates the trade between buyer and seller and earns a commission.

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Q3. Which of the following BEST describes the NYSE Designated Market Maker (DMM) obligation?

A) Post the lowest available ask price for each assigned security B) Maintain fair and orderly markets by providing liquidity, including buying when no buyers exist C) Execute all orders electronically without human intervention D) Match orders only from institutional clients

Answer: B -- DMMs are obligated to maintain fair and orderly markets in their assigned securities. This includes stepping in with their own capital to buy when there are no willing buyers or sell when there are no willing sellers. This affirmative obligation is the key structural feature of the NYSE auction market that distinguishes it from NASDAQ's competing market maker model.

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Q4. During the IPO process, a company distributes a preliminary prospectus to institutional investors before the offering becomes effective. This document is commonly referred to as a:

A) Final prospectus B) Tombstone advertisement C) Red herring D) Offering circular

Answer: C -- The preliminary prospectus is called a "red herring" because it historically bore a red-ink disclaimer stating the information was preliminary and subject to change. It is used during the road show to provide information but does not contain the final offering price. The final (definitive) prospectus is delivered at or before sale. A tombstone (B) is a post-offering advertisement with minimal details.

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Q5. Which of the following BEST describes the primary concern regulators have about dark pools?

A) Dark pools charge excessive commissions compared to traditional exchanges B) Dark pools are only accessible to retail investors, disadvantaging institutions C) Dark pools reduce price transparency because large trades are hidden from the public market D) Dark pools are not subject to any SEC regulation

Answer: C -- The primary regulatory concern about dark pools is reduced price transparency. By hiding large orders from the public market, dark pools can reduce the quality of price discovery for all participants. They are regulated under Reg ATS (D is wrong) and are used primarily by institutional investors, not retail investors (B is wrong). They typically charge lower fees than traditional exchanges (A is wrong).