India's Nifty 50 and Gift Nifty indices explained

The Nifty 50 is the flagship index of the National Stock Exchange of India, comprising 50 large‑cap companies from sectors such as banking, IT, oil and gas, consumer goods, pharmaceuticals, automobiles, metals and telecommunications. It serves as a barometer of the Indian equity market and is widely used by investors to gauge overall market performance.

Gift Nifty is a derivative contract traded on the GIFT City platform that mirrors the Nifty index. It provides an early signal of how the Indian market may open by reflecting global investor sentiment before domestic trading begins. By extending trading hours, Gift Nifty allows international participants to react to overnight news, currency moves and global risk appetite, supporting price discovery and reducing uncertainty at the market open.

Open interest (OI) data for Nifty futures and options, including Gift Nifty, helps traders assess market strength. Rising price with rising OI suggests a strong trend, while falling price with falling OI may indicate weakening participation. Analysts combine OI trends with price action to make more informed trading decisions.