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Indices & Index Changes

How India’s stock indices are built and changed: who decides what goes into the Nifty 50 and Sensex, how MSCI reviews move money, and what new indices actually track.

Illustration of the NSE and BSE buildings with stacked blocks labeled Nifty 50, Sensex, Nifty Next 50, Nifty 100 and Nifty 500, next to a signpost asking what is an index, how is it constructed, who manages it, and where to find the data.
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Who Actually Decides What’s in the Nifty 50? A Plain-English Guide to India’s Indices

The Nifty 50 is decided by NSE Indices Limited's Index Maintenance Sub-Committee, which applies a published rulebook in reviews every March and September; the Sensex is decided by BSE Index Services' own index committee. The rules, press releases and current constituents are free on niftyindices.com and bseindices.com, and the September 2026 review, for example, named BSE Ltd to replace Wipro in the Nifty 50.

September 28, 2026
MSCI logo beside a glass globe showing Asia and a city skyline

MSCI Rebalancing: The Index Reshuffle That Can Move Your Stocks

MSCI rebalancing is the regular review in which MSCI adds, removes or reweights stocks in indexes such as MSCI India; with more than $17 trillion of assets benchmarked to its indexes, funds must buy or sell when they change. The next announcement is on 11 November 2026, effective 1 December, and inclusion is not a buy signal, since the moves are often priced in early.

Oct 24, 2026
Illustration of a person celebrating opening a glowing AI treasure chest, with text reading NSE Indices launches Nifty AI Catalysts Index — Now we can easily track India’s AI enablers

India’s AI Treasure Map: 48 Stocks, One Free Index

The Nifty AI Catalysts Index, launched by NSE Indices on 11 September 2026, tracks 48 Nifty 500 companies that supply the products, services and infrastructure behind AI, with each stock capped at 3%. It leans on capital goods, power and telecom infrastructure rather than AI software.

Sep 28, 2026