Major Stock Market Indices — Live Prices & Performance
Track all major global indices in real time — S&P 500, NASDAQ, Dow Jones, DAX, FTSE 100, Nikkei, CAC 40, and more. Compare performance across regions, view live charts, and understand what moves each index.
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What is a stock market index?
A stock market index measures the performance of a group of stocks representing a portion of the market. The S&P 500, for example, tracks the 500 largest US companies by market capitalization. Indices are used as benchmarks — professional fund managers are judged by whether they "beat" their benchmark index over time.
S&P 500 — The benchmark of benchmarks
The S&P 500 is widely considered the best single gauge of large-cap US equities. It covers approximately 80% of available US market capitalization across all major sectors. Created by Standard & Poor's, it is market-cap weighted — meaning larger companies like Apple and Microsoft have greater influence on the index's daily moves.
NASDAQ 100 — Tech-heavy powerhouse
The NASDAQ 100 includes the 100 largest non-financial companies listed on the NASDAQ exchange. It is heavily weighted toward technology — Apple, Microsoft, NVIDIA, and Meta together represent a large portion of the index. It tends to be more volatile than the S&P 500 due to its tech concentration and is tracked by the popular QQQ ETF.
What moves an index?
Indices move based on the weighted average price changes of their constituent stocks. Major drivers include earnings reports from large-cap components, macroeconomic data (GDP, CPI, jobs), central bank decisions (Fed, ECB), geopolitical events, and overall investor risk sentiment. A strong earnings beat from Apple or Microsoft alone can lift the S&P 500.
Price-weighted vs market-cap weighted
The Dow Jones Industrial Average is price-weighted — higher-priced stocks have more influence regardless of company size. The S&P 500 and NASDAQ 100 are market-cap weighted — larger companies have more influence. The Nikkei 225 is also price-weighted. Most modern indices use market-cap weighting as it better reflects economic reality.
How to invest in indices
The easiest way to invest in an index is through ETFs (Exchange-Traded Funds). SPY tracks the S&P 500, QQQ tracks the NASDAQ 100, DIA tracks the Dow Jones, and EWG tracks German DAX. Index funds offer low-cost diversification. Warren Buffett himself has repeatedly recommended low-cost S&P 500 index funds for most retail investors.
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