How index classification works (and why it moves markets)

The annual review

MSCI and FTSE Russell each run a formal, annual market-classification review. They assess economic development, market size and liquidity, and — most decisively — market accessibility: currency convertibility, foreign-investor registration, custody arrangements, short-selling and transfer rules, and the reliability of settlement.

Changes rarely come as surprises. Markets are first placed on watch lists, consultations are run with institutional investors, and implementation is announced well in advance — often a year or more — precisely because so much indexed money must reposition.

A concrete example: South Korea

South Korea is the canonical case of plumbing outweighing wealth. A top-tier economy by development measures, it has remained in MSCI's emerging tier for years, with limited offshore convertibility of the won cited as a central obstacle. The lesson: classification measures what a foreign institution can actually do in a market, not how modern the country is.

Why reclassification is a risk and an opportunity

When a market is promoted, index-tracking funds must buy it — often billions of dollars of forced demand concentrated around the implementation date. Demotions force selling the same way. Investors holding single-country funds through a reclassification can see flows, volatility, and index composition change underneath them. This site's methodology page records the classification basis used here and flags pending changes.

Our classification basis →