MSCI World

The MSCI World is a widely followed global stock market index that tracks the performance of around 1,300 large and mid-cap companies across 23 developed countries.^[1][2] It is maintained by MSCI, formerly Morgan Stanley Capital International, and is used as a common benchmark for global stock funds intended to represent a broad cross-section of global markets.^{[citation needed]}

The index includes a collection of stocks of all the developed markets in the world, as defined by MSCI. The exclusion of stocks from emerging and frontier economies makes the index narrower in global coverage than the name suggests.^{[clarification needed]} A related index, the MSCI All Country World Index (ACWI), incorporates both developed and emerging countries. MSCI also produces a Frontier Markets index, including another 31 markets.^[3]

The MSCI World Index has been calculated since 1969,^[4] in various forms: without dividends (Price Index), with net or with gross dividends reinvested (Net and Gross Index), in US dollars, Euro and local currencies.

The MSCI World Index is constructed by classifying equity securities from developed market countries into large-cap and mid-cap segments based on their free float-adjusted market capitalization.

Market capitalization refers to the total market value of a company's outstanding shares, calculated as the share price multiplied by the total number of shares. In MSCI's methodology, this figure is adjusted for free-float: meaning only shares available for public trading are counted, excluding those held by insiders, governments, or other holders who are unlikely to trade.

Within each developed market country, MSCI ranks companies by their free float-adjusted market capitalization and includes:

• Large-cap stocks: companies that collectively account for approximately the top 70% of the cumulative market capitalization
• Mid-cap stocks: companies that bring the cumulative total of market capitalization up to 85%

The MSCI index excludes the remaining 15% of market capitalization segment, corresponding to low-cap stocks.

This segmentation ensures that the MSCI World Index captures roughly 85% of the investable equity universe in each country, providing broad and representative coverage of developed market equities.

MSCI evaluates a country's equity market as "developed" if all of the following criteria are met:^[5][6]

MSCI monitors all countries continuously, but formal reclassification consultations occur each spring, with decisions announced the following June and implemented in quarterly index reviews. Off-cycle announcements are reserved for exceptional market events.

The index includes companies in the following 23 countries:

Companies are divided into sectors according to GICS. The breakdown is shown here in the pie chart, with information technology being the biggest sector with more than 26% as of July 2025.^[1]

• (a) Total returns including reinvested dividends.^[8][9]

• FTSE Global Equity Index Series (FTSE All-World Index)
• Exchange-traded fund
• MSCI EAFE
• S&P Global 1200
• Stock market index