Browse Investing

UK and FTSE Indexes

FTSE, FTSE 100, Financial Times Actuaries indexes, and London-market benchmark terms.

UK and FTSE Indexes terms explain how benchmarks, market gauges, weighting rules, index families, data series, and market-cycle labels are used in investment analysis.

Use this branch when benchmark selection, index membership, weighting, float adjustment, publication source, region, sector, or dividend treatment changes the comparison being made.

Key Terms in This Branch

TermUse it for
Financial Times Actuaries All-Share IndexBenchmark construction, regional equity index, weighting, market-cycle, sentiment, commodity, freight, or index-publication terms.
Financial Times Actuaries Share IndexesBenchmark construction, regional equity index, weighting, market-cycle, sentiment, commodity, freight, or index-publication terms.
Financial Times Industrial Ordinary Share IndexBenchmark construction, regional equity index, weighting, market-cycle, sentiment, commodity, freight, or index-publication terms.
Financial Times Share IndexesBenchmark construction, regional equity index, weighting, market-cycle, sentiment, commodity, freight, or index-publication terms.
Financial TimesSTOck Exchange Group (FTSE)Benchmark construction, regional equity index, weighting, market-cycle, sentiment, commodity, freight, or index-publication terms.
FTSEBenchmark construction, regional equity index, weighting, market-cycle, sentiment, commodity, freight, or index-publication terms.
FTSE 100Benchmark construction, regional equity index, weighting, market-cycle, sentiment, commodity, freight, or index-publication terms.

What to Check

Check the index provider, universe, eligibility rule, weighting method, float adjustment, rebalancing schedule, currency, dividend treatment, data date, and whether the index is investable or only a benchmark.

Common Mistakes

  • Treating an index as a recommendation or as a directly owned portfolio.
  • Comparing index returns without checking currency, dividends, fees, and time period.
  • Ignoring methodology changes, reconstitution, concentration, and float adjustments.
  • Using a regional or sector index as a broad-market benchmark without checking its universe.

Indexes are benchmarks and data tools, not personalized investment recommendations or performance promises.

In this section

Choose a subsection first. Deeper term pages live inside each subsection, which keeps large topic hubs readable.

Financial Times Share Indexes

Financial Times Share Indexes are market benchmarks used to track UK share performance across selected listed companies.

FTSE

FTSE refers to a family of equity indexes used to benchmark UK and global stock-market performance.

FTSE 100

The FTSE 100 is a benchmark UK equity index tracking 100 large companies listed on the London Stock Exchange.

Revised on Sunday, June 21, 2026