The top 10 sectors by market capitalisation in India significantly influence the direction of major indices. Grounded in September 2026 data from the National Stock Exchange (NSE) broad market and Nifty index compositions, the top 10 heavyweights driving India's multi-trillion dollar equity ecosystem are ranked by their market cap dominance below: [1, 2, 3] ------------------------------ ## 📊 Top 10 Sectors by Market Capitalisation Weightage | Rank | 🏛️ Sector | 📈 Approximate Index Weight / Dominance | 🏢 Key Anchor Companies Driving the Sector | |---|---|---|---| | 1 | Financial Services (BFSI) | 33% – 36% | HDFC Bank, ICICI Bank, State Bank of India (SBI), Bajaj Finance | | 2 | Oil, Gas & Consumable Fuels | 9.5% – 11% | Reliance Industries (RIL), ONGC, Coal India | | 3 | Information Technology (IT) | 8.5% – 13% | Tata Consultancy Services (TCS), Infosys, HCLTech, Wipro | | 4 | Automobile & Auto Components | 6.5% – 7.5% | Mahindra & Mahindra (M&M), Maruti...
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