Financial Times Stock Exchange Group (FTSE): Definition

Definition · Updated November 1, 2025

Key takeaways

– The FTSE (pronounced “footsie”) refers to the FTSE Russell Group (formerly the Financial Times Stock Exchange Group) and is commonly shorthand for the FTSE 100 index, the headline benchmark for the largest companies listed on the London Stock Exchange (LSE). (Investopedia; FTSE Russell)
– FTSE Russell is an index provider owned by the London Stock Exchange Group (LSEG) that creates and maintains many benchmarks (FTSE 100, FTSE 250, FTSE All‑Share, Russell 2000, etc.) used by investors worldwide. (FTSE Russell; LSEG)
– The FTSE 100 is a market‑capitalization weighted index of the 100 largest U.K.‑listed companies; constituents and weightings are reviewed quarterly. (Investopedia; LSE)
– You cannot buy an index itself, but you can gain exposure through funds (ETFs, mutual funds), ADRs, or buying the underlying stocks. U.S. investors commonly use ETFs that track FTSE indices. (Investopedia)

Understanding the FTSE and FTSE Russell

– What FTSE Russell is: an indexing and market‑data business that compiles and publishes benchmark indexes covering U.K., European and global equity markets. The FTSE Russell brand was created after FTSE and Russell Investments merged in 2015 and is now part of LSEG. (FTSE Russell; LSEG)
– What “FTSE” refers to in practice: most often the FTSE 100 (the top 100 U.K. companies by market capitalization), but the FTSE family includes many other indexes such as the FTSE 250, FTSE 350 and the FTSE All‑Share. (Investopedia; FTSE Russell)
– How the FTSE 100 is calculated: a continuously calculated market‑capitalization weighted index (calculated from LSE open to close); index composition and weightings are updated quarterly using the previous day’s closing prices. (Investopedia; LSE)

The FTSE 100 — a practical summary

– Purpose: widely used as a barometer of large U.K. listed companies and often cited in financial media as a shorthand for “London stocks.” (Investopedia)
– History & scale: launched January 1984 with a base of 1,000; it has reached levels above 7,000 over time. Constituents include many large multinational companies; the index is affected by both U.K. economic developments and global business performance. (Investopedia)
– Rebalancing: quarterly constituent reviews (typically the Wednesday after the first Friday in March, June, September and December). (Investopedia)

Other important FTSE indices

– FTSE 250: mid‑cap U.K. companies (ranked 101–350); often shows more domestic economic exposure than the FTSE 100.
– FTSE 350: combines the FTSE 100 and FTSE 250.
– FTSE All‑Share: broader representation of U.K. equities.
– Russell indices (via FTSE Russell): e.g., Russell 2000 (U.S. small‑cap benchmark). (FTSE Russell; Investopedia)

How to invest in the FTSE — practical steps for U.S. investors

1. Decide your exposure objective
– Do you want large‑cap U.K. exposure (FTSE 100), mid‑cap (FTSE 250), or broader U.K. market exposure (FTSE All‑Share/FTSE 350)?
2. Choose the investment vehicle
– ETFs: the most common choice. Examples cited by market providers include Vanguard FTSE 100, Vanguard FTSE 250, iShares Core FTSE 100, iShares 350 U.K. Equity Index Fund, and Vanguard FTSE U.K. All Share Index Unit Trust. (Investopedia)
– Mutual funds that track FTSE indices or active funds that invest in U.K. equities.
– ADRs / Direct U.K. shares: buy U.K. companies’ ADRs or buy shares directly on the LSE (via an international broker).
3. Open or use a brokerage account that supports the chosen vehicle
– For ETFs listed on U.S. exchanges, a standard U.S. brokerage account works.
– For direct LSE trading or U.K. domiciled funds, use an international broker or a broker with U.K. market access.
4. Consider currency and taxation effects
– Currency risk: U.K. equity returns in U.S. dollar terms depend on GBP/USD moves as well as stock performance.
– Tax: U.K. dividends are generally not subject to U.K. withholding for non‑residents, but U.S. investors must report foreign dividends and can be affected by U.S. tax rules. Also note tax complexity for non‑U.S. domiciled funds (PFIC rules may apply) — consult a tax advisor. (Investopedia; tax guidance recommendation)
– Transaction taxes: buying U.K. shares directly can involve Stamp Duty Reserve Tax (0.5% on many purchases) — ETFs may mitigate this cost. Check with your broker.
5. Execute the trade and monitor
– Buy the ETF or fund in line with your allocation plan.
– Monitor rebalancing needs, currency exposure and tax reporting.

What is the U.S. version of the FTSE?

– There is no direct one‑for‑one U.S. “FTSE,” but comparable headline indexes would be:
– S&P 500 — broad large‑cap U.S. benchmark (500 companies).
– Dow Jones Industrial Average (DJIA) — 30 large U.S. blue‑chip firms.
– The role FTSE 100 plays in the U.K. is analogous to how the S&P 500 and DJIA are referenced in the U.S. (Investopedia)

Can Americans invest in the FTSE?

– Yes. Common routes:
– Buy U.S.‑listed ETFs that track FTSE indices (simplest).
– Buy ADRs of U.K. companies that trade in the U.S.
– Trade U.K.‑listed shares via an international broker (consider Stamp Duty and currency).
– Practical considerations: ETF domicile (U.S., Ireland, UK), tax treatment (PFIC implications for non‑U.S. funds), dividend taxes and currency risk. Consult a tax professional for specifics. (Investopedia)

Stock market vs. stock exchange — concise distinction

– Stock exchange: a specific marketplace where securities are listed and traded (e.g., New York Stock Exchange, Nasdaq, London Stock Exchange). Exchanges are operated by companies that run the trading infrastructure.
– Stock market: the broader concept referring to all publicly traded equities in a region or country (e.g., the U.K. stock market). An exchange is a component of the stock market. (Investopedia)

Practical checklist before investing in FTSE exposure

– Define your goal (income, growth, diversification).
– Pick the right index exposure (FTSE 100 vs FTSE 250 vs All‑Share).
– Choose the product (ETF, mutual fund, ADRs, direct stock).
– Confirm the fund domicile and tax consequences for U.S. investors; consider PFIC and dividend treatment.
– Account for currency risk and decide if you need currency hedging.
– Compare fees (expense ratios, bid/ask spreads), tracking error and liquidity.
– Check trading hours and order types if buying on LSE directly.
– Rebalance and monitor tax reporting requirements annually.

The bottom line

The FTSE (FTSE Russell) is a major index provider and the FTSE 100 is the principal benchmark for large U.K. companies. U.S. investors can gain exposure easily via ETFs and other instruments, but they should be mindful of currency risk, fund domicile and tax implications. Use reputable ETFs or funds to replicate FTSE indices and consult a tax professional for cross‑border tax rules.

Sources

– Investopedia. “FTSE.” (source material provided)
– FTSE Russell. “Our Story.” (FTSE Russell)
– London Stock Exchange. “FTSE 100: Constituents.” (LSE)
– Examples of ETFs and index fund products cited from Investopedia summary (Vanguard, iShares examples).

If you’d like, I can:

– Compare specific FTSE‑tracking ETFs (fees, domicile, liquidity).
– Show example trade steps in a sample brokerage.
– Summarize tax concerns (PFIC basics and common solutions) for U.S. investors.

Related Terms

Further Reading