FTSE 100 Index Guide: Performance, S&P 500 Comparison, FAQs

If you’ve ever wondered what the FTSE 100 index stands for, you’re not alone: it tracks the 100 largest companies on the London Stock Exchange with a net market cap of £2.48 trillion and a dividend yield of 3.06% (Fidelity). This guide breaks down its performance, compares it to the S&P 500, and answers common investor questions.

Launch date: 3 January 1984 ·
Constituents: 100 ·
Net market cap: £2.48 trillion ·
Dividend yield: 3.06%

Six key data points define the FTSE 100’s profile.

What does FTSE 100 stand for?

FTSE stands for Financial Times Stock Exchange. The index was launched on 3 January 1984 as a joint venture between the London Stock Exchange and the Financial Times, replacing the older FT30 Index (Titan-Edge). It is commonly referred to as the “Footsie” and is maintained by FTSE Russell Group, a subsidiary of the London Stock Exchange (Fidelity).

Who manages the FTSE 100 index?

• The index is managed by FTSE Russell Group, a leading global index provider (Fidelity).
• Constituents are reviewed quarterly and adjusted based on full market capitalisation (London Stock Exchange).
• The index is calculated using market-capitalisation weighting of all eligible LSE stocks (Titan-Edge).

Which country does the FTSE 100 index represent?

The FTSE 100 represents the United Kingdom stock market. It includes the 100 largest companies listed on the London Stock Exchange, the primary stock exchange for the UK (Fidelity). However, many of its constituents are multinational corporations such as HSBC, Shell, and BP, so its performance often reflects the global economy (Everyday Investor, personal finance blog).

The implication: For UK retail investors, the FTSE 100 is a key barometer of domestic economic health, but its heavy multinational exposure means it doesn’t purely track the UK economy.

What is the 10 year average return on the FTSE 100?

Over the 20 years from 2006 to 2026, the FTSE 100 delivered a total shareholder return of 244%, equating to 6.4% annualised including dividends (IG UK). After adjusting for average inflation, this real return drops to about 3.4% annually (IG UK). For the 2010–2019 period, the index returned 8.3% per year with dividends reinvested, or 4.3% without reinvestment (Titan-Edge).

FTSE 100 historical performance from 2000 to 2026

• 2000 dot-com bubble: index reached ~6,950 (Titan-Edge)
• 2007–2009 financial crisis: fell from ~6,700 to ~3,500 (IG UK)
• March 2020 COVID crash: dropped 25% in three months (IG UK)
• 2022–2023 inflation concerns: index volatile around 7,000–8,000
• Early 2025: trading near 10,344

How does dividend yield affect total return?

The FTSE 100’s dividend yield has historically ranged from 3% to 4%, making it attractive for income investors. The current yield is 3.06%. Dividends contribute significantly to total return, especially during periods of low capital growth. For example, the 8.3% annual return from 2010–2019 included approximately 4% in dividends (Titan-Edge).

Which is better, S&P 500 or FTSE 100?

Four key differences separate the FTSE 100 from the S&P 500.

Should I invest in the S&P 500 or FTSE 100 index?

The choice depends on your goals. The S&P 500 has historically offered higher capital growth but with greater volatility. The FTSE 100 provides higher dividend income and is more stable during downturns. For diversification, holding both can reduce risk. IG UK notes the FTSE 100 is more defensive during market downturns (IG UK). When comparing FTSE 100 companies, metrics such as P/E ratio, P/B ratio, ROE, debt-to-equity, revenue growth, and EPS growth are commonly used (Investing.com, financial education platform).

Is 100% S&P 500 too risky?

Concentrating all equity exposure in the S&P 500 means relying heavily on US tech giants. If the US tech sector underperforms, portfolios could suffer. Adding the FTSE 100 or other global indices can provide a hedge. The FTSE 100’s sector composition (energy, mining, financials) correlates less with the S&P 500’s tech focus, offering diversification benefits (IG UK).

What this means: For risk-averse income-focused investors, the FTSE 100 may be more suitable. For growth-oriented investors, the S&P 500 has historically outperformed, but not without higher volatility.

Why are markets crashing?

Market crashes are typically triggered by economic shocks, asset bubbles, or geopolitical events. The FTSE 100 has experienced several major drawdowns.

What causes a stock market crash?

• Asset bubbles: unsustainable price increases lead to sharp corrections (e.g., dot-com bubble) (IG UK)
• Financial crises: systemic banking failures (2008)
• Pandemics: COVID-19 caused a 25% drop in Q1 2020 (IG UK)
• Inflation and interest rate hikes (2022)

How does a crash affect the FTSE 100?

The FTSE 100 is not immune to crashes, but its defensive sectors (energy, mining, healthcare) often cushion falls compared to tech-heavy indices. For example, during the 2008 crisis it fell roughly 50% from peak to trough, but recovered to pre-crash levels by 2013 (IG UK). On Black Monday 1987, it fell 21.7% over two days (IG UK).

The pattern: Crashes are inevitable, but the FTSE 100 has historically recovered within a few years. For long-term investors, staying invested through crashes has led to positive outcomes.

Why do 90% of people lose money in the stock market?

The statistic that 90% of retail investors lose money is often cited, though the exact figure varies by study. Common reasons include emotional trading, lack of diversification, high fees, and market timing.

What is the 7% sell rule?

The 7% sell rule is a risk management technique recommended by some advisors: sell a stock if it drops 7% from your purchase price to limit losses. This helps prevent emotional decision-making and preserves capital. However, it’s not a guarantee of success and can lead to frequent trading if not used carefully.

Warren Buffett’s advice for investors

Warren Buffett has long advocated for low-cost index funds, particularly the S&P 500 index fund, as the best investment for most people. He has stated that the long-term trend of the stock market is upward (IG UK). While not a direct quote, his philosophy emphasises patience and diversification.

The implication: For retail investors, avoiding common pitfalls requires discipline, a long-term horizon, and proper diversification. Index investing removes the need to pick winning stocks.

For UK retail investors, the FTSE 100 offers a balanced mix of income and stability, but it’s not a growth champion like the S&P 500. The choice between them comes down to whether you prioritise dividend income and lower volatility or historic capital growth. Whichever path you take, diversification across both indices may be the safest bet.

For more insights on individual stocks, see our analysis of Flight Centre Shares – Price, Performance and Dividends.