Stock Market Glossary
Stock index
Calculated key figure that shows the performance of a group of stocks.
In brief: Calculated key figure that shows the performance of a group of stocks.
Meaning in practice
Stock indices such as DAX, S&P 500 or MSCI World combine many individual values into one barometer. Performance indices (e.g. DAX) reinvest dividends, price indices (e.g. EuroStoxx 50) do not. They are a benchmark, investment object (via ETF) and sentiment indicator at the same time.
Context for investors and traders
When analysing a company, this term is meaningful only alongside the business model, industry and development across several reporting periods. One-off effects, accounting choices and the corporate cycle can move individual metrics.
How to use this in practice
A robust assessment looks across several reports: revenue quality, operating margin, investment, debt and cash flow can tell a different story from one metric. Changes in the competitive setting also matter more than an isolated snapshot.
What to keep in mind
Compare companies with suitable peers and check whether one-off effects, buybacks or accounting choices shift the metric. A strong number does not automatically explain a share valuation.
