Browse Market Structure

Stock Exchange

An in-depth article exploring the history, types, key events, functionalities, importance, and various aspects of stock exchanges around the world.

The stock exchange, commonly referred to as the stock market, is a pivotal platform for the sale and purchase of securities where prices are determined by supply and demand. Its primary function is to facilitate the raising of capital by public companies, governments, and other entities through the sale of securities to investors. In addition, stock exchanges provide liquidity and reduce investment risks.

Primary Market

In the primary market, new securities are created and sold for the first time, usually through initial public offerings (IPOs).

Secondary Market

The secondary market involves the buying and selling of previously issued securities. The New York Stock Exchange (NYSE) and NASDAQ are notable examples.

Over-the-Counter (OTC) Market

In the OTC market, trading is done directly between two parties, often through a dealer network, rather than on a centralized exchange.

Dark Pools

Dark pools are private exchanges where large volumes of securities are traded anonymously, away from the public eye.

Stock Exchange Functions

  • Capital Formation: Allows entities to raise funds by issuing shares and bonds.
  • Price Discovery: The exchange acts as a platform for price determination through the forces of supply and demand.
  • Liquidity: Provides liquidity, enabling investors to quickly buy and sell securities.
  • Risk Management: Facilitates risk distribution and management.

Mathematical Models/Formulas

The Black-Scholes model is commonly used for option pricing:

$$ C(S, t) = S_0N(d_1) - Xe^{-rt}N(d_2) $$

where \(d_1\) and \(d_2\) are calculated as:

$$ d_1 = \frac{\ln(S/X) + (r + \sigma^2/2)t}{\sigma\sqrt{t}} $$
$$ d_2 = d_1 - \sigma\sqrt{t} $$

Importance

Stock exchanges play a crucial role in the economic development by mobilizing savings for investment and providing a platform for raising capital. They are essential for corporate governance and wealth creation.

  • Securities: Financial instruments representing ownership (stocks) or debt (bonds).
  • Bourse: Another term for a stock exchange outside English-speaking countries.
  • Market Capitalization: The total value of a company’s shares of stock.
  • Initial Public Offering (IPO): The process of offering shares of a private corporation to the public.

FAQs

What is a stock exchange?

A stock exchange is a platform for buying and selling securities, including stocks, bonds, and other financial instruments.

How does a stock exchange work?

It operates as a regulated marketplace where buyers and sellers trade securities through brokers and dealers.

Why are stock exchanges important?

They enable companies to raise capital, provide liquidity for investors, and facilitate price discovery for securities.
Revised on Monday, May 18, 2026