NSE updates stock options strike scheme for 22 stocks effective July 1
The exchange revises step values, strike counts, and reserve strikes for near, mid, and far expiry. Members must load the updated contract file before trading on July 1.
What changed
- Revised step values and strike counts for 22 stock options.
- Wide-range parameters set at double the narrow-range values.
- Members must update contract.gz file from NSE extranet before July 1.
The read
NSE has rolled out a standard periodic revision to its stock options strike scheme for 22 stocks. The changes adjust step values and the number of strikes available for near, mid, and far expiry — with wide-range steps typically double the narrow-range ones. This affects how finely options contracts are priced and how many strike prices are available. No lot sizes or underlying eligibility changes here. The real action item is for trading members: they must load the updated contract file from NSE's extranet before trading begins on July 1, 2026. Failure to do so could lead to trading errors. For most investors, this is background plumbing, not a market-moving event.
Primary source: official circular (PDF)