National Stock Exchange of India Limited

Circular

All Members,

Market Data – Discontinuation of Existing Broadcast Parameters in Futures & Options Segment

This is in reference to Exchange circular NSE/MSD/74133 dated May 08, 2026 and NSE/MSD/74448 dated May 27, 2026 regarding ‘Market data- new broadcast parameters in Futures & Options segment’.

In the aforesaid circular, Exchange introduced new broadcast parameters for market data in F&O segment for implementing changes in data type for token level cumulative volume (total traded volume) from “Unsigned Integer” (4 bytes) to “LONG” (8 bytes). Further, Exchange also informed to provide a coexistence phase for receiving broadcast from both existing and new parameters, after which Exchange would discontinue the existing broadcast parameters.

Accordingly, members using NNF are required to note the following discontinuation date of coexistence period i.e. discontinuation of existing market data broadcast parameters. Thus, kindly migrate to new market data broadcast parameters before the deadline. No further extension shall be provided on the timelines below.

Please note all other details as mentioned in the above circulars shall remain unchanged.

For ease and convenience, members may refer to below annexures:

For and on behalf of National Stock Exchange of India Limited

---

Khushal Shah Associate Vice President

Annexure 1

Members are advised to note the below ‘Existing Broadcast Parameters’ which shall be discontinued:

I. Combined broadcast - Price volume (5 depth 1 second refresh), other related data, master updates, market open / close status message broadcast etc.

II. Stream wise broadcast - Price volume (5 depth 1 second refresh), other related data, master updates, market open / close status message broadcast etc. on additional streams in FO Segment

| Stream | Stream ID | Security / Contracts * | (Source 1) | (Source 2) | Approx. bandwidth utilization | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | | | | Multicast IP | Port | Multicast IP | Port | | | FO Stream B | 1 | As per master stream file | 239.50.51.51 | 15051 | 239.50.51.151 | 15151 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream C | 2 | As per master stream file | 239.50.51.52 | 15052 | 239.50.51.152 | 15152 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream D | 3 | As per master stream file | 239.50.51.53 | 15053 | 239.50.51.153 | 15153 | 0.6 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | | 4 | | 239.50.51.54 | 15054 | 239.50.51.154 | 15154 | 0.9 Mbps | | FO Stream E | | As per master stream file | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream F | 5 | As per master stream file | 239.50.51.55 | 15055 | 239.50.51.155 | 15155 | 0.4 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream G | 6 | As per master stream file | 239.50.51.56 | 15056 | 239.50.51.156 | 15156 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream H | 7 | As per master stream file | 239.50.51.57 | 15057 | 239.50.51.157 | 15157 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream I | 8 | As per master stream file | 239.50.51.58 | 15058 | 239.50.51.158 | 15158 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream J | 9 | As per master stream file | 239.50.51.59 | 15059 | 239.50.51.159 | 15159 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream K | 10 | As per master stream file | 239.50.51.60 | 15060 | 239.50.51.160 | 15160 | 0.4 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream L | 11 | As per master stream file | 239.50.51.61 | 15061 | 239.50.51.161 | 15161 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream M | 12 | As per master stream file | 239.50.51.62 | 15062 | 239.50.51.162 | 15162 | 0.1 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream N | 13 | As per master stream file | 239.50.51.63 | 15063 | 239.50.51.163 | 15163 | 3 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream O | 14 | As per master stream file | 239.50.51.64 | 15064 | 239.50.51.164 | 15164 | 3 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream P | 15 | As per master stream file | 239.50.51.65 | 15065 | 239.50.51.165 | 15165 | 3 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream Q | 16 | As per master stream file | 239.50.51.66 | 15066 | 239.50.51.166 | 15166 | 3 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | | 17 | | 239.50.51.67 | 15067 | 239.50.51.167 | 15167 | 3 Mbps | | FO Stream R | | As per master stream file | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | | | FO Stream S | 18 | As per master stream file | 239.50.51.68 | 15068 | 239.50.51.168 | 15168 | 3 Mbps | | | | | 239.50.51.50 | 15050 | 239.50.51.50 | 15050 | |

Annexure 2

Members are advised to mandatorily migrate to below parameters on priority or shall ensure readiness of their migration plan before the discontinuation date of existing broadcast parameters:

A. Combined broadcast - Price volume (5 depth 1 second refresh), other related data, master updates, market open / close status message broadcast etc.

B. Stream wise broadcast - Price volume (5 depth 1 second refresh), other related data, master updates, market open / close status message broadcast etc. on additional streams in FO Segment

Members using stream broadcast are required to change to the updated parameters to receive the Existing transcodes (except 17201, 11833, 7208 & 7211) and new transcodes (i.e. 7201, 1833, 17208 & 17211) as per table below:

| Stream | Stream ID | Security / Contracts * | (Source 1) | (Source 2) | Approx. bandwidth utilization | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | | | | Multicast IP | Port | Multicast IP | Port | | | FO Stream B | 1 | As per master stream file | 239.50.51.21 | 15021 | 239.50.51.121 | 15121 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream C | 2 | As per master stream file | 239.50.51.22 | 15022 | 239.50.51.122 | 15122 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream D | 3 | As per master stream file | 239.50.51.23 | 15023 | 239.50.51.123 | 15123 | 0.69 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream E | 4 | As per master stream file | 239.50.51.24 | 15024 | 239.50.51.124 | 15124 | 1.035 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream F | 5 | As per master stream file | 239.50.51.25 | 15025 | 239.50.51.125 | 15125 | 0.46 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream G | 6 | As per master stream file | 239.50.51.26 | 15026 | 239.50.51.126 | 15126 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream H | 7 | As per master stream file | 239.50.51.27 | 15027 | 239.50.51.127 | 15127 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream I | 8 | As per master stream file | 239.50.51.28 | 15028 | 239.50.51.128 | 15128 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream J | 9 | As per master stream file | 239.50.51.29 | 15029 | 239.50.51.129 | 15129 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream K | 10 | As per master stream file | 239.50.51.30 | 15030 | 239.50.51.130 | 15130 | 0.46 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream L | 11 | As per master stream file | 239.50.51.31 | 15031 | 239.50.51.131 | 15131 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream M | 12 | As per master stream file | 239.50.51.32 | 15032 | 239.50.51.132 | 15132 | 0.115 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream N | 13 | As per master stream file | 239.50.51.33 | 15033 | 239.50.51.133 | 15133 | 3.45 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream O | 14 | As per master stream file | 239.50.51.34 | 15034 | 239.50.51.134 | 15134 | 3.45 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream P | 15 | As per master stream file | 239.50.51.35 | 15035 | 239.50.51.135 | 15135 | 3.45 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | | 16 | | 239.50.51.36 | 15036 | 239.50.51.136 | 15136 | 3.45 Mbps | | FO Stream Q | | As per master stream file | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream R | 17 | As per master stream file | 239.50.51.37 | 15037 | 239.50.51.137 | 15137 | 3.45 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | | | FO Stream S | 18 | As per master stream file | 239.50.51.38 | 15038 | 239.50.51.138 | 15138 | 3.45 Mbps | | | | | 239.50.51.20 | 15020 | 239.50.51.20 | 15020 | |

Notes: 1) Stream wise broadcast is not recommended for Neatplus application. 2) *Members are required to refer the Master Files for MTBT for details regarding tokens broadcasted in the respective stream(s).

General Notes applicable for all types of market data broadcast:

• The size of broadcast indicated above is an estimated approximation and shall change depending upon the market activity. Thus, Market participants are strongly advised to monitor and adequately size their infrastructure and systems while subscribing to these feeds.
• With respect to using Exchange data, Member’s may kindly take note of Exchange circulars NSE/MSD/64333 dated October 03, 2024, NSE/COMP/56426 dated April 20, 2023 and NSE/MEM/26958 dated June 19, 2014. Exchange data can be used by Member’s clients who are registered for trading with the member on the Exchange in any segment.
• With respect to using Exchange data, Member’s may also kindly take note of Exchange circular NSE/MSD/54696 dated December 02, 2022 regarding Market Data Broadcasts – Advisory and Member Guide.
• Members shall be solely responsible for implementing and maintaining redundancy for market data broadcast subscribed from NSEIL. NSEIL shall not be held liable in any manner whatsoever including but not limited to for any disconnection, excess bandwidth utilization, related latency issues’ etc. which arises out of the member’s decisions on market data broadcast configurations.
• National Stock Exchange of India Limited (“NSEIL”) strongly recommends its members to build resilience and redundancy in their subscription to market data broadcast provided by NSEIL, to ensure continuity of their business operations. NSEIL has made enabling provisions for members to implement redundancies by providing two sources of data and/or data recovery mechanisms. Members shall be solely responsible for implementing and maintaining redundancy for market data broadcast subscribed from NSEIL. NSEIL shall not be held liable in any manner whatsoever including but not limited to for any disconnection, excess bandwidth utilization, related latency issues’ etc. which arises out of the member’s decisions on market data broadcast configurations.