FTSE 100
Category
Related Terms
Browse by Category
What Is the FTSE 100?
The FTSE 100 is a capitalization-weighted stock market index representing the 100 largest companies listed on the London Stock Exchange by market capitalization, serving as the primary benchmark for UK equity market performance.
The FTSE 100, formally known as the Financial Times Stock Exchange 100 Index, is the primary and most important stock market index for the United Kingdom and one of the most widely followed and respected major European equity benchmarks globally. It represents the 100 largest companies listed on the London Stock Exchange by market capitalization, providing a comprehensive snapshot of the UK's economic health and corporate performance across major sectors. The index was launched in 1984 as a joint venture between the Financial Times and the London Stock Exchange to replace the older FT 30 index. It quickly became the standard benchmark for UK equity market performance and is now followed by investors worldwide. The FTSE 100 includes some of the world's most recognizable companies across various sectors including banking, energy, mining, pharmaceuticals, consumer goods, and telecommunications. As a capitalization-weighted index, the FTSE 100 gives greater influence to larger companies based on their market value. A company's weight in the index is determined by its market capitalization multiplied by the number of shares available for trading. This means that the largest companies, like those in the banking and energy sectors, have the most significant impact on the index's overall performance.
Key Takeaways
- FTSE 100 tracks the 100 largest UK companies by market capitalization
- Capitalization-weighted index where larger companies have greater influence
- Primary benchmark for UK stock market performance and institutional investors
- Constitutes about 80% of the total market capitalization of the London Stock Exchange
- Quarterly reviewed with potential changes to index composition
- Influences investment decisions and serves as underlying asset for financial products
How the FTSE 100 Works
The FTSE 100 operates on a real-time basis during London Stock Exchange trading hours, typically from 8:00 AM to 4:30 PM GMT. The index value is calculated continuously throughout the trading day, reflecting the current market prices of its constituent companies. Companies are selected for inclusion based on their market capitalization ranking among UK-listed companies. The index is reviewed quarterly (in March, June, September, and December) to ensure it continues to represent the largest companies. Changes to the index composition occur when companies enter or exit the top 100 by market capitalization. The base value of the FTSE 100 was set at 1,000 points when it launched in 1984. Today, it trades at much higher levels, often in the range of 7,000-8,000 points, reflecting both the growth of the UK economy and the effects of stock splits and other corporate actions. The index uses a divisor system to maintain continuity when companies are added or removed, or when they undergo corporate actions like stock splits or rights issues. This ensures that the index value remains consistent despite changes in its composition.
Key Elements of the FTSE 100
The FTSE 100's composition reflects the structure of the UK economy, with significant representation from financial services, energy, mining, and consumer goods sectors. Historically, the index has been heavily weighted toward banks and energy companies, though this has diversified somewhat over time. Sector diversification is an important characteristic. While no sector dominates completely, the index typically includes: - Financial services (banks, insurance companies) - Energy (oil and gas producers) - Mining and basic materials - Consumer goods and services - Pharmaceuticals and healthcare - Telecommunications and technology The index's international exposure is substantial, as many FTSE 100 companies derive significant revenues from overseas markets. This global exposure means the index's performance often reflects international economic conditions as much as domestic UK factors. Market capitalization requirements ensure that only the largest, most established companies are included. This creates a stable, blue-chip index that appeals to institutional investors seeking exposure to large, established businesses.
Important Considerations for FTSE 100 Investing
Investors should understand that the FTSE 100's performance is influenced by both UK-specific and global factors. Domestic economic indicators, Bank of England policy decisions, and political events all impact the index. However, with many constituent companies having significant international operations, global economic conditions also play a major role. Currency fluctuations can affect FTSE 100 performance, particularly for investors outside the UK. Since most trading occurs in pounds sterling, exchange rate movements can amplify or dampen returns for international investors. The index's concentration in certain sectors means it can be volatile during industry-specific downturns. For example, the financial crisis of 2008 heavily impacted the FTSE 100 due to its large banking sector exposure. Dividend yields are typically attractive, as many FTSE 100 companies have strong dividend payment histories. This makes the index popular among income-focused investors, though yields can vary with market conditions.
Advantages of FTSE 100 Index Investing
The FTSE 100 provides investors with diversified exposure to the UK's largest and most established companies. This diversification reduces company-specific risk while maintaining exposure to economic growth. Low expense ratios make index-tracking funds and ETFs an attractive option for cost-conscious investors. These products typically have much lower fees than actively managed funds. The index's stability and liquidity make it suitable for long-term investors. The large market capitalizations of constituent companies ensure good trading liquidity and lower volatility compared to smaller company indices. Strong dividend payments from many FTSE 100 companies provide attractive income streams. The index's dividend yield often exceeds those of other major global indices.
Disadvantages of FTSE 100 Index Investing
The FTSE 100's heavy concentration in financial services and energy sectors can lead to volatility during sector-specific downturns. This concentration risk means the index can underperform during banking crises or energy price collapses. Limited exposure to smaller, faster-growing companies means investors miss out on the higher growth potential of mid-cap and small-cap stocks. The index's blue-chip focus may not capture the full growth potential of the UK economy. International investors face currency risk, as all trading occurs in pounds sterling. Exchange rate fluctuations can significantly impact returns for investors outside the UK. The index's performance may not fully reflect the broader UK economy, as it excludes many smaller companies that contribute significantly to employment and economic activity.
Real-World Example: FTSE 100 Performance
Consider an investor who purchased £10,000 worth of FTSE 100 index tracker shares in January 2020.
FTSE 100 vs. Other Major Indices
The FTSE 100 compares to other major global stock indices in terms of composition, methodology, and market representation.
| Index | Companies | Market Cap Focus | Geographic Focus | Key Characteristics |
|---|---|---|---|---|
| FTSE 100 | 100 | Large Cap | UK | Blue-chip UK companies, sector concentration |
| S&P 500 | 500 | Large Cap | US | Broad US market representation, tech heavy |
| Dow Jones | 30 | Large Cap | US | Price-weighted, traditional blue-chips |
| CAC 40 | 40 | Large Cap | France | French market benchmark, financial heavy |
| DAX | 40 | Large Cap | Germany | German industrial and export focus |
FTSE 100 Market Impact
The FTSE 100 significantly influences UK economic sentiment and investment flows. Major index movements can affect investor confidence, currency values, and economic policy decisions. Institutional investors often use FTSE 100 performance as a key benchmark for portfolio evaluation.
FAQs
The FTSE 100 is reviewed quarterly (March, June, September, December). Companies may be added or removed based on their market capitalization ranking. Changes typically occur when companies enter or exit the top 100 largest UK-listed companies.
The FTSE 100 includes the 100 largest companies by market capitalization, while the FTSE 250 includes the next 250 largest companies (positions 101-350). The FTSE 100 represents larger, more established companies, while the FTSE 250 focuses on mid-sized businesses.
The FTSE 100 is a capitalization-weighted index. Each company's weight is determined by its market capitalization (share price × shares outstanding) multiplied by the number of shares available for trading. The index uses a divisor to maintain continuity when companies are added or removed.
The FTSE 100 is heavily weighted toward financial services (banks and insurance), energy (oil and gas), mining, consumer goods, and pharmaceuticals. Financial services and energy typically account for 40-50% of the index's total market capitalization.
Investors can gain exposure through index-tracking funds, ETFs, or futures contracts. Popular options include Vanguard FTSE 100 ETF or various tracker funds offered by UK investment providers. These provide diversified exposure at low cost.
The Bottom Line
The FTSE 100 stands as the definitive benchmark for UK equity market performance, representing the country's largest and most influential publicly traded companies across major industries. As a capitalization-weighted index, it provides investors with exposure to established blue-chip businesses across diverse sectors, offering stability, liquidity, and attractive dividend yields. While the index offers strong long-term performance potential, investors should consider its sector concentration risks and currency exposure for international investors. Whether used as a direct investment vehicle through ETFs or as a performance benchmark, the FTSE 100 remains a cornerstone of UK financial markets and a key indicator of economic health.
More in Stock Market Indices
At a Glance
Key Takeaways
- FTSE 100 tracks the 100 largest UK companies by market capitalization
- Capitalization-weighted index where larger companies have greater influence
- Primary benchmark for UK stock market performance and institutional investors
- Constitutes about 80% of the total market capitalization of the London Stock Exchange