This is a visual explainer based on the Wikipedia article on the Australian Securities Exchange. Read the full source article here. (opens in new tab)

Australia's Financial Engine

From the trading floor's past to the high-speed algorithms of today, explore the institution at the heart of Australia's economy.

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Introduction to the ASX

A National Institution

The Australian Securities Exchange (ASX) is the nation's primary securities exchange. Formed on April 1, 1987, through the amalgamation of six state-based exchanges, it provides a marketplace for trading equities, derivatives, and other financial instruments. In 2006, it merged with the Sydney Futures Exchange, solidifying its role as a comprehensive market operator. The ASX is not just a marketplace; it is also a public company, ASX Limited, listed on its own exchange.

Global & Regional Significance

The ASX is a major player in global finance. With a market capitalisation of approximately A$2.6 trillion as of early 2024, it ranks among the world's top 20 listed exchange groups. It holds the position of the largest exchange in the Southern Hemisphere and the second largest in the Asia-Pacific region by free-float market capitalisation. This scale is supported by Australia's robust funds management industry, which boasts the fourth-largest pool of managed funds globally, largely driven by the compulsory superannuation system.

The Regulatory Framework

The integrity of the ASX is maintained through a multi-layered regulatory structure:

  • ASIC (Australian Securities & Investments Commission): Supervises real-time trading and the conduct of market participants. ASIC also ensures ASX Limited's own compliance with listing rules.
  • ASX Compliance: A subsidiary responsible for monitoring and enforcing the compliance of listed companies with ASX operating rules.
  • RBA (Reserve Bank of Australia): Oversees the ASX's clearing and settlement facilities to ensure the stability of the broader financial system.

The Evolution of the Exchange

From States to a Nation

The ASX's roots trace back to the mid-19th century gold rush, which spurred the creation of separate stock exchanges in each state capital, beginning with Melbourne in 1861. For decades, these exchanges operated independently. In 1937, the Australian Associated Stock Exchanges (AASE) was formed to standardize rules for listings, brokers, and commissions, marking the first major step toward a unified national market.

The Trading Floor Era

Early trading was a manual, voice-driven process. The "call system" involved an exchange employee shouting company names while brokers bid and offered. This was later replaced by the "post system" in the 1960s, where exchange employees known as "chalkies" would manually write bids and offers on blackboards. This physical, open-outcry method remained the standard until the digital revolution of the late 1980s.

Key Historical Milestones

The modern ASX was shaped by several transformative events. The national, unified exchange was officially formed in 1987, the same year it launched its first electronic trading system, SEATS.

  • 1861: Australia's first stock exchange is established in Melbourne during the gold rush.
  • 1937: The Australian Associated Stock Exchanges (AASE) is formed to create uniform rules.
  • 1969-70: The Poseidon nickel boom and subsequent crash highlight the need for stronger national regulation.
  • 1987: The six state exchanges amalgamate to form the Australian Stock Exchange (ASX). The Stock Exchange Automated Trading System (SEATS) is launched, ending the "chalkie" era.
  • 1994: The ASX introduces Low Exercise Price Options (LEPOs), expanding its derivatives offerings.
  • 1998: ASX becomes the first exchange in the world to demutualise and list its own shares on its market.
  • 2006: The ASX merges with the Sydney Futures Exchange (SFE), creating a fully integrated market for equities and derivatives.
  • 2011: A proposed merger with the Singapore Exchange (SGX) is blocked by the Australian Government on national interest grounds.

Trading Systems & Hours

ASX Trade: The Equities Engine

All equity securities on the ASX are traded via ASX Trade, an ultra-low latency platform based on NASDAQ OMX's Genium INET system. This technology, used by exchanges globally, is engineered for high speed and reliability, capable of executing trades with a latency as low as approximately 250 microseconds. This ensures efficient price discovery and execution for all market participants.

ASX Trade24: A Global Derivatives Platform

Derivatives are traded on the ASX Trade24 platform, which is designed for global, 24-hour access. It features a distributed network with access points in major financial hubs like Chicago, London, Hong Kong, and Singapore. A key feature is its ability to maintain two active trading days simultaneously, allowing new products to open for trading in one time zone while others are still active under the previous day's session.

The Trading Day Explained

The ASX operates on weekdays, excluding national public holidays. The trading day is structured to ensure an orderly market opening and closing.

All times are in Sydney time (AEST/AEDT).

  • 7:00am - 10:00am: Pre-market session. Brokers can enter orders into the system in preparation for the market open.
  • 10:00am - 10:10am (approx.): Market Open. The market opens via a series of single-price auctions, phased alphabetically by stock code. A small random element is included to prevent precise timing of the first trades.
  • 10:00am - 4:00pm: Normal Trading. Continuous trading occurs where buyers and sellers are matched in real-time.
  • 4:00pm - 4:10pm: Pre-Closing Single Price Auction. The market prepares for the closing auction.
  • 4:10pm - 4:12pm: Closing Single Price Auction. A final auction determines the daily closing price for each security.

Market Products & Instruments

Equities and Indices

The core of the ASX is its equity market, where shares in public companies are bought and sold. The performance of this market is tracked by a family of indices managed in partnership with Standard & Poor's. The benchmark index is the S&P/ASX 200, which represents the 200 largest eligible companies. Other key indices include the S&P/ASX 20, S&P/ASX 50, and the broader All Ordinaries.

Derivatives: Futures & Options

The ASX offers a deep and liquid derivatives market, largely inherited from the Sydney Futures Exchange. Key products include:

  • Futures: Contracts to buy or sell an asset at a predetermined future date and price. Popular contracts include the SPI 200 Index Futures and futures on 3-year and 10-year Australian government bonds.
  • Options: Contracts giving the buyer the right, but not the obligation, to buy or sell an underlying asset at a specified price on or before a certain date. Options are available on many leading shares.

Other Traded Products

Beyond standard shares and derivatives, the ASX provides a diverse range of investment vehicles:

  • Exchange-Traded Funds (ETFs): Managed funds that trade like shares, offering diversified exposure to indices, sectors, or commodities.
  • Real Estate Investment Trusts (REITs): Companies that own and operate income-producing real estate.
  • Interest Rate Securities: Includes corporate bonds and floating-rate notes, which trade and settle like shares.
  • Warrants: A derivative that gives the right to buy or sell a security at a certain price before expiration.

Market Mechanics & Operations

Settlement: The CHESS System

The ASX operates on an uncertificated, electronic system for share ownership. The Clearing House Electronic Sub-register System (CHESS) is the central component. Most investors hold shares through a broker who "sponsors" them into CHESS, assigning them a Holder Identification Number (HIN). This system facilitates the T+2 settlement cycle, where the transfer of money and securities is completed two business days after a trade is executed. The alternative is an "issuer-sponsored" holding, managed directly by the company's share registry.

Short Selling Regulations

Short selling, the practice of selling a security one does not own with the intent of repurchasing it later at a lower price, is permitted on the ASX under strict conditions. Brokers must report all daily gross short sales to the ASX, which then publishes aggregated data to the market. This transparency is designed to maintain market stability. During periods of extreme volatility, such as the 2008 financial crisis, the regulator ASIC has the power to temporarily ban or restrict short selling to protect market integrity.

The ASX Sharemarket Game

As part of its educational mandate, the ASX runs the Sharemarket Game, a simulation for students and the public. Participants are given a hypothetical A$50,000 to invest in a selection of real companies, using live market data over a set period. This interactive tool provides a risk-free environment to learn the principles of sharemarket investing, portfolio management, and market dynamics.

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References

References

A full list of references for this article are available at the Australian Securities Exchange Wikipedia page

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Important Notice

This page was generated by an Artificial Intelligence and is intended for informational and educational purposes only. The content is based on a snapshot of publicly available data from Wikipedia and may not be entirely accurate, complete, or up-to-date.

This is not financial advice. The information provided on this website does not constitute investment advice, financial advice, trading advice, or any other sort of advice, and you should not treat any of the website's content as such. Always conduct your own due diligence and consult a licensed financial professional before making any investment decisions. The creators of this page are not responsible for any investment losses you may incur.