The Financial Times Stock Exchange 100 Index, commonly referred to as the FTSE 100, serves as a key indicator of the UK stock market's performance. Comprised of the 100 largest companies by market capitalization listed on the London Stock Exchange, it covers a wide range of industries, including finance, energy, consumer goods, and technology. The index is calculated in real-time during trading hours and is widely considered a benchmark for investors assessing the health of the UK equity market.
For example, companies such as HSBC Holdings, Unilever, and BP are typically included in the FTSE 100, reflecting significant portions of the UK's economic activity. Movements in the FTSE 100 can influence investor sentiment and flow of capital in and out of the market. Related concepts include the FTSE 250, which tracks mid-cap companies in the UK, and the FTSE All-Share Index, which encompasses all eligible firms listed on the London Stock Exchange.