BSE19 Aug 2026noticePrepared by Complied AI

Release of New Version of Market Data API in Equity Derivatives Segment

BSE notice 20260820-14 · 19 Aug 2026

Official title

Release of new version of Market Data API in Equity Derivatives segment - Update

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Summary

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What changed

BSE revises the go-live date for the MDI/EMDI API Version 1.4.5 in the Equity Derivatives segment to August 31, 2026. The exchange schedules mock trading for this version on August 29, 2026. The go-live date for NFCAST Version 6.2 remains September 07, 2026, with mock trading on September 05, 2026. These API versions support pre-open session modifications and the dissemination of closing reference prices for stock futures. Trading members and front-end trading application vendors must complete testing in the test environment to ensure a smooth rollout.

Who is affected: Trading members and front-end trading application vendors
Required action: Complete testing in the test environment
Key dates: Mock trading for MDI/EMDI API Version 1.4.5 — 28 Aug 2026
Go-live date for MDI/EMDI API Version 1.4.5 — 30 Aug 2026
Mock trading for NFCAST Version 6.2 — 04 Sept 2026
Go-live date for NFCAST Version 6.2 — 06 Sept 2026

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Source details

Source: BSE Ltd (Bombay Stock Exchange)
Type: notice
Published by source: 19 Aug 2026
Document number: 20260820-14
Issuing division: Trading Development
Coverage area: securities

Document text

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NOTICE

Notice No.	20260820-14
Notice Date	20 Aug 2026
Category	Trading
Segment	Derivatives
Department	Trading Development
Subject	Release of new version of Market Data API in Equity Derivatives segment - Update
Attachments	No Attachment

[Image omitted. See the official document.]

This is in partial modification to Exchange circular no. 20260805-32 dated August 05, 2026, regarding release of the new version of Market Data APIs in Equity Derivatives segment. This is also further to Exchange circular no. 20260803-36 dated August 03, 2026 regarding Modifications in the Pre-open Session in Equity Derivatives segment.

It is proposed to revise the go-live date for the new MDI/EMDI API (Version 1.4.5) in the Equity Derivatives Segment to August 31, 2026. Please note that there is no change in the go-live date for NFCAST Version 6.2, which shall remain as per the schedule communicated earlier.

Market Data Streams	Current Version	New Version	Current Go-Live Date	Revised Go-Live Date
NFCAST API	Version 5.0	Version 6.2	September 07, 2026
(Mock Trading on September 05,2026)	September 07, 2026

Important Note: Trading members may kindly note that the above-mentioned market data API versions shall facilitate rollout of pre-open session modifications and dissemination of closing reference price for stock futures between 3:15pm – 3:20pm, as informed vide Exchange circular no. 20260803-36 dated August 03, 2026.

Trading members and front-end trading application vendors are requested to complete the necessary testing in their respective applications in the test environment to ensure a smooth rollout.

For any queries about this circular, members may kindly get in touch through the following contact details –

Queries	Email ID	Telephone No.
Technical queries	bse.tech@bseindia.com

For & on behalf of BSE Ltd,

Nawaid Pathan Vice President I.T. Development

Tejash Somaiya Vice President Trading Development

August 20, 2026

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