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What Is the London Stock Exchange (LSE)?


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    Highlights

  • The London Stock Exchange is one of the oldest and largest in the world, originating over 300 years ago and formalized in 1801
  • The 1986 Big Bang deregulation modernized the LSE with electronic trading, boosting its global competitiveness
  • The LSE's Main Market offers diverse segments like Premium, Standard, and Specialist for various company listings
  • Major companies listed on the LSE include AstraZeneca, Shell, HSBC, Unilever, and BP
Table of Contents

What Is the London Stock Exchange (LSE)?

Let me explain to you that the London Stock Exchange, or LSE, is the primary stock exchange in the United Kingdom and its largest one. It originated more than 300 years ago, and in 1973, regional exchanges merged to form the Stock Exchange of Great Britain and Ireland, which was later renamed the London Stock Exchange. You should know that the Financial Times Stock Exchange 100 Share Index, often called the Footsie, is the dominant index here, including 100 of the top blue-chip stocks on the LSE.

The exchange is physically located in the city of London. In 2007, it merged with the Milan Stock Exchange, known as Borsa Italiana, to create the London Stock Exchange Group.

Key Takeaways

I want you to remember that the LSE is one of the oldest stock exchanges globally, the largest in Europe, and the main one for the United Kingdom. It rivals the New York Stock Exchange in market capitalization, trade volume, access to capital, and liquidity. Also, the Big Bang refers to the government's deregulation on October 27, 1986, which modernized trading with an electronic system and opened the LSE to worldwide capital markets.

Understanding the London Stock Exchange (LSE)

You need to understand that London has long been a leading financial city, a hub for international trade, banking, and insurance. The LSE's history dates back to 1698, when broker John Castaing started posting stock and commodity prices at Jonathan's Coffee House, a spot where businessmen met to trade. He called his list 'The Course of the Exchange and Other Things.'

By 1801, it was clear a formal system was needed to stop fraud and bad traders, so brokers set rules and paid fees to join, creating London's first regulated stock exchange.

Through its primary markets, the LSE offers cost-efficient access to deep and liquid capital pools. It hosts a wide range of companies and provides electronic equities trading for listed firms. The LSE is the most international exchange, with thousands of companies from over 60 countries, serving as Europe's top source for equity liquidity, benchmark prices, and market data. With partnerships in Asia and Africa, it aims to remove cost and regulatory barriers from global capital markets.

The LSE and the Big Bang

On October 27, 1986, the UK government deregulated the London stock market, an event called the Big Bang due to the immediate massive changes. This introduced electronic trading, replacing open outcry, making the system more efficient and faster, which increased trading volumes and helped the LSE compete with global exchanges like the NYSE.

The Big Bang was part of reforms to cut overregulation and promote free-market competition. It eliminated minimum fixed commissions on trades and ended the separation between stock traders and investor advisors. These shifts boosted competition among brokerages, leading to mergers and acquisitions. Another change allowed foreign ownership of UK brokers, opening the market to international banks.

The Main Market

The Main Market of the LSE is one of the world's most diverse, with companies from 40 different sectors. Listing here gives access to real-time pricing, deep capital pools, benchmarking via the FTSE UK Index Series, and high levels of media coverage, research, and announcements.

Companies can join the Main Market in ways like Premium, which applies to equity shares of commercial trading companies meeting the UK's super-equivalent rules, potentially offering lower capital costs and inclusion in FTSE indices. The Standard segment covers equity shares, Global Depositary Receipts, debt securities, and derivatives with lighter compliance, helping emerging market companies attract London's capital. The Specialist Fund Segment targets high-growth businesses and specialized investment entities for institutional or professionally advised investors, for those not eligible for Premium or Standard listings seeking growth funding.

What Companies Does the London Stock Exchange Group Own?

Besides the LSE itself, the London Stock Exchange Group owns FTSE Russell, Refinitiv, and LCH Clearing.

When Was the London Stock Exchange Established?

The LSE was formed in 1801 as London's first regulated exchange.

What Are the Top Companies on the London Exchange?

As of June 21, 2023, the largest companies by market cap on the LSE are AstraZeneca PLC, Shell PLC, HSBC Holdings PLC, Unilever PLC, and BP PLC.

The Bottom Line

In summary, the LSE is the UK's main stock exchange and one of the largest worldwide, with a history from the 1600s that has evolved over time. It lists major global companies like Shell, HSBC, and BP.

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