NSE updates 21-27 September 2026: Gold Mini expiry, USDINR ratios

For contracts expiring in October 2026 and later, Gold Mini futures expire on the third last business day of the month, and Gold Mini options expire five business days before the first business day of the underlying futures tender period. The circular is effective 5 October 2026, and existing contracts will be pre-matured.

Revised EUR, GBP, and JPY conversion ratios for the USD 1 million equivalent take effect on 29 October 2026. Positions across exchanges must stay within USD 100 million equivalent, and a client who exceeds that must disclose the underlying exposure to the trading member.

From 12 October, block trades in the BL and TL series use a 0.01 tick instead of the price-based tick, NSE starts an end-of-day index price report, and it adds .DAT bhavcopy files for the capital market and EGR segments. .MS and .MD formats stop on 16 November 2026, and the 26 September mock sessions did not release new software.

On 21 September NSE added black-box algo approval for Quantiply Technologies Private Limited, which already had white-box approval. On 22 September it gave final empanelment to seven providers that had been provisional.

NSE refreshed ESM and ASM lists, and from 29 September high-encumbrance Annexure I names draw at least 75 percent margin in equity and equity derivatives on open positions as of 28 September and on new positions. The October reversal-trade cancellation list covers the EQ, BE, BZ, SM, ST, and SZ series, and excludes approved securities, Nifty 500 names, and ETFs.

From 1 October, market-wide, trading member, FII/FPI, mutual fund, proprietary, and client position limits on single-stock futures and options are revised, as are approved securities and banks for collateral. From 30 September the strike scheme for specified stock options changes, and from 28 September clearing members must file associate details or a NIL declaration on a new portal.

Quintegra Solutions Limited returns to series EQ from 28 September after paying annual listing fees. Supreme Engineering Limited is restricted to trade-for-trade for non-compliance with LODR Regulation 14 for the year ended 2025-26, and Jaykay Enterprises Limited's 20,571,642 partly paid rights shares (JAYKAYPP, paid-up Re 0.50) start trading on 29 September.