Earlier, NSE used event-based index reconstitution for mergers/demergers, where once shareholders approval is received, it is considered as a trigger to initiate replacement of such stocks in the index and exclusion of stocks going through merger/demerger is done much ahead of ex-date.
This rule changed from April 30, 2023 and the exchange decided to use a Special pre-open session (SPOS) to determine index reconstruction.
You can check the below mentioned post to read the summary of that circular:
What happens to Nifty and Reliance Industries after the demerger?
On 20th July (record date), a Pre-open Call Auction Session will be conducted for Reliance in the Capital Market segment on July 20, 2023, from 9 AM to 10 AM to determine the opening price of Reliance.
So, what happens in the special pre-open session?
Let’s assume Reliance Industries closed at 3000 on 19th July,
On the next day, at the end of the Pre-open session, Reliance industries closes at 2800. Then, the difference (3000-2800) = 200 will be the price of Jio Financial Services which will continue to remain in the Index at that constant price till the shares are re-listed.
Once shares of Jio Financial Services are relisted, the shares will be excluded from the indices at end-of-day on 3rd day after relisting.
This is subject to certain price conditions:
- In case, during the first 2 days of these 3 days, if Jio Financial Services hits the price band on both days, then the exclusion date will be extended by another 3 days. After two consecutive days of the spun off business/ entity (Jio Financial Services here) not hitting the price band, Jio Financial Services will be removed after the third trading day of such observation.
Update: As JFS hit the price band in the first two days, The removal of JFS from nifty is postponed to 29th August from tomorrow
If on the 3rd day of extended period Jio Financial Services again hits the price band, exclusion of the stock from the index will not be extended further.
So, basically, Reliance Industries (along with constant price of Jio Financial Services will remain in the index till Jio Financial Services is relisted after which Jio Financial Services will get delisted after 3 days)
To know more about Reliance demerger, Check the below post out: