The Bombay Stock Exchange is Asia's oldest exchange, and its Sensex is India's most-quoted market number. These 5 BSE index pages cover the benchmark and the main sector indices, each with its live level, constituents, sector weightings and long-form explanation.
Sensex vs Nifty 50
Both are broad-market benchmarks, and they move together most days. The difference is breadth and venue: the Sensex tracks 30 companies on the BSE, while the Nifty 50 tracks 50 on the NSE. The Nifty is the more widely used base for derivatives and index funds; the Sensex has the longer history, running back to 1979.
How the Sensex is calculated
The Sensex uses free-float market capitalisation weighting. Each company's weight reflects the market value of its publicly tradable shares, not its share price, and an index divisor keeps the series comparable across time as constituents change, shares are issued, or corporate actions occur.
| Index | Tracks |
|---|---|
| BSE Sensex | India's benchmark 30-stock index — live value, constituents and analysis. |
| BSE Bankex | The BSE banking sector index — leading public & private banks tracked live. |
| BSE IT | The BSE technology index — India's top IT and software companies. |
| BSE Auto | The BSE automobile index — carmakers, two-wheelers, EV and auto ancillaries. |
| BSE MidCap | The BSE mid-cap index — emerging mid-sized companies with growth potential. |
Index levels are for information only and are not a recommendation to buy or sell any security or index product.