Index options expire on a fixed day each week or month, depending on the index. Only Nifty 50 and Sensex have weekly expiries. All other indices expire monthly.
Index option expiry schedule
| Index | Symbol | Weekly expiry | Monthly expiry |
| Nifty 50 | NIFTY | Tuesday of every week | Last Tuesday of each month |
| Sensex | SENSEX | Thursday of every week | Last Thursday of each month |
| Nifty Bank | BANKNIFTY | No weekly expiry | Last Tuesday of each month |
| BSE Bankex | BANKEX | No weekly expiry | Last Thursday of each month |
| Nifty Midcap Select | MIDCPNIFTY | No weekly expiry | Last Tuesday of each month |
| Nifty Financial Services | FINNIFTY | No weekly expiry | Last Tuesday of each month |
| BSE SENSEX 50 | SENSEX50 | No weekly expiry | Last Thursday of each month |
| Nifty Next 50 | NIFTYNXT50 | No weekly expiry | Last Tuesday of each month |