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Free lessons on how markets match buyers and sellers. Written in Halifax, Nova Scotia.

Learning areas.

Five free areas that take apart the machinery of markets, piece by piece. Each one explains what a mechanism does, where it came from and why it changed.

Where should you start?

Pick the part of the machine you want to understand.

Area 01

Market structure

How orders meet. This area compares the main ways markets have matched buyers and sellers: call auctions, continuous trading, dealer quotes and electronic order books.

What you learn

  • Why a market needs one place, real or virtual, where orders gather
  • How price-time priority decides who trades first
  • What the spread and the depth of a book tell you about a market

Key concepts

  • Bid and ask
  • Order book
  • Call auction
  • Market maker
  • Spread
  1. Auctions and continuous tradingPrimerWhy some markets gather orders and cross them at once, while others match each order the moment it arrives.
  2. Dealers versus order booksPrimerA dealer quotes prices and takes the other side; an order book lets investors meet each other directly. We compare the two.
  3. When trading floors went quietArticle

Area 02

Information and technology

How prices travel. From messengers and the telegraph to the ticker tape, quotation terminals and electronic data feeds, this area follows the race to see the latest price.

What you learn

  • How the ticker created a shared reference price
  • Why delays in information can unsettle a market
  • How speed and proximity became questions of fairness

Key concepts

  • Telegraph
  • Ticker symbol
  • Quotation system
  • Latency
  1. From the runner to the wirePrimerHow prices moved from slips of paper carried by messengers to telegraph lines linking whole cities.
  2. How the stock ticker changed the speed of marketsArticle

Area 03

Rules and safeguards

How markets learned to pause. Trading halts, circuit breakers and disclosure rules, and the crises that led to each of them.

What you learn

  • Why exchanges closed in 1914 and how halts became planned rules
  • How market-wide and single-stock circuit breakers differ
  • Who writes and supervises trading rules in Canada

Key concepts

  • Circuit breaker
  • Trading halt
  • Price band
  • Self-regulation
  1. Reading a halt noticePrimerWhat a trading halt announcement says, who issues it and what happens before trading resumes.
  2. Why circuit breakers existArticle

Area 04

Clearing, settlement and ownership

What happens after the trade. Clearing houses, depositories, book entries and the shrinking settlement cycle that now completes most Canadian share trades in one business day.

What you learn

  • Why agreeing on a trade and completing it are separate steps
  • How netting reduces the payments firms must make
  • What it means to hold shares through an intermediary

Key concepts

  • Clearing house
  • Depository
  • Book entry
  • T+1
  1. Netting, explained with five brokersPrimerFive firms, twenty trades between them and one clearing house: how the payments shrink to a handful.
  2. From paper certificates to digital recordsArticle

Area 05

Canada's exchanges

How Canadian markets grew. From brokers in Montréal and Toronto to the regional exchanges of the West and the national structure that exists today, with the provinces writing the rules.

What you learn

  • Why Canada has provincial securities regulators
  • How senior and venture markets came to be separate
  • Which institutions handle trading, derivatives and settlement

Key concepts

  • Senior market
  • Venture market
  • CSA
  • CIRO
  1. Who regulates what in CanadaPrimerProvincial commissions, the Canadian Securities Administrators and CIRO, and how their roles divide.
  2. A brief history of stock exchanges in CanadaArticle

How do the pieces fit together?

Use the materials in three moves.

  1. Play the machine

    Start with the matching machine on the home page. Step through an auction, a floor and an order book until the difference feels obvious.

  2. Read one area end to end

    Each area links its lessons and articles in a suggested order. Read the area summary first, then the article, then come back to the key concepts.

  3. Check the words

    Keep the A to Z glossary open in another tab. Twelve terms cover most of what you need to read about market structure with confidence.

What does any of this cost?

Nothing. No account, no tier, no catch.

  • Every area and article is free to read
  • No registration, subscription or paid upgrade
  • No financial products, trading tips or personal advice
  • Funded by advertising, as explained on our About page