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What is the FTSE 350 Index

- July 7, 2025 - Team Invest in Brands

Understanding the FTSE 350 Index

The FTSE 350 Index is one of the most important stock market indices in the UK. It combines the FTSE 100 and the FTSE 250, giving a broader view of the UK’s corporate landscape. This makes it a valuable tool for investors who want a clearer picture of the market.

What Makes Up the FTSE 350?

The FTSE 350 is made up of:

  • FTSE 100: The top 100 companies by market value listed on the London Stock Exchange (LSE).
  • FTSE 250: The following 250 largest companies are listed on the LSE.

Together, they make up the 350 largest companies on the LSE by market capitalisation.

Why It Matters to Investors

1. Broad Market View

The FTSE 350 provides a more comprehensive view of how both large and mid-sized UK companies are performing. It is more balanced than just looking at the FTSE 100.

2. Diverse Sectors

The index encompasses a diverse range of industries, including banking, healthcare, retail, and manufacturing. This means investors can track multiple sectors simultaneously.

3. Benchmark for Funds

Many investment funds use the FTSE 350 as a benchmark. If a fund aims to beat the UK market, it often compares its performance to this index.

4. Lower Volatility Than Smaller Indexes

Because the FTSE 350 includes many large, stable companies, it tends to be less volatile than indexes that focus on smaller firms.

How Companies Are Selected

Market Capitalisation

Only the most prominent companies by market value qualify for the FTSE 350.

Liquidity

Companies must also have a sufficient number of shares actively traded on the market.

Free Float

A certain percentage of a company’s shares must be publicly available, not held by insiders.

Regular Review

The FTSE reviews the list every quarter. Companies can be added or removed based on their size and trading activity.

Who Tracks the FTSE 350?

Investors, analysts, fund managers, and economists all pay attention to the FTSE 350. It is also used in financial media to give updates on the UK market’s overall performance.

How the FTSE 350 Is Calculated

The index is weighted by market capitalisation. This means:

  • Larger companies have more influence on the index value.
  • If a large company’s share price rises, the entire index can increase, even if the share prices of smaller companies decline.

FTSE 100 vs FTSE 250 vs FTSE 350

Index Companies Included Focus

FTSE 100 Top 100 UK companies Large-cap companies

FTSE 250 Next 250 companies Mid-cap companies

FTSE 350, FTSE 100 + FTSE 250, Broad UK market

Pros of the FTSE 350 Index

1. Diversification

Investing in the FTSE 350 provides access to a diverse range of companies across various sectors.

2. Strong Performance Track Record

Many companies in the FTSE 350 have stable earnings and long-term growth.

3. Reliable for Long-Term Investing

It’s a solid option for investors looking for long-term growth and income.

4. Useful for Passive Investing

Index funds and ETFs that track the FTSE 350 are significant for hands-off investing.

Cons of the FTSE 350 Index

1. Limited Global Exposure

Though some FTSE 100 firms operate globally, the index still focuses on UK-listed companies.

2. Heavy Weighting on Large Companies

Big companies can dominate index movements. This may mask what’s happening with smaller firms.

3. Market Sentiment Impacts

Economic or political news can cause significant swings, even if a company’s fundamentals remain strong.

How to Invest in the FTSE 350

1. Index Funds

These funds aim to copy the performance of the FTSE 350 by holding its stocks.

2. ETFs (Exchange-Traded Funds)

ETFs also track the index and can be bought and sold like shares.

3. Mutual Funds

Some UK-focused mutual funds invest in companies listed on the FTSE 350.

4. Individual Stocks

You can also buy shares in companies that are part of the index.

Final Thoughts

The FTSE 350 is a strong representation of the UK economy. It includes the country’s biggest companies and provides a mix of large and mid-sized firms. For new and experienced investors, it offers a practical way to track or invest in the UK market.

Whether you want to invest for growth, income, or stability, the FTSE 350 gives you a broad base to start from. As always, make sure you understand your financial goals before investing.

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Welcome to Invest in Brands UK – your gateway to exploring business opportunities, investment avenues, and franchise possibilities across the United Kingdom. Our platform is designed to bridge the gap between businesses and potential investors by offering valuable insights and well-researched content about the dynamic UK market. While we provide comprehensive information, we strongly emphasize that the final decision rests with you, the investor, and thorough research is paramount before making any commitments.

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