Understanding Market-Cap Weighted Indexes: A Snapshot for Investors Understanding Market-Cap Weighted Indexes: A Snapshot for Investors In the world of stock market investing, market-cap-weighted indexes are widely used to track market performance. Kiran Shroff / Tuesday, January 28, 2025 / Article rating: 5.0 You’ve likely encountered this concept in popular Indian indexes like the Nifty 50 or the BSE Sensex, but what exactly does it mean, and why should investors pay attention to it?