I have nifty put of dec 26, if nifty cuts lot size to 65 what will happen to it.
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If you hold an odd lot of Nifty long-dated options, these positions will remain open until the contract’s expiry, and no further action can be taken after the lot size has changed. It will be open till the expiry of the contract. For more details, click here.
You can exit the position any time before the revision in the lot size. If you choose not to exit, the position will automatically be settled by the exchange on the expiry date.
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So the moral of the story is, i should close positions before dec 30, otherwise it will be closed only on expiry(dec26) by exchange. I cannot close positions on my own after dec 30.
Is my understanding correct?
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My existing NIFTY and BANKNIFTY positions are of DEC expiry (expiring 30th DEC).
I plan on holding my position till expiry day.
Revised lot size comes into effect Jan 2026 onwards (Monthly expiry).
The mention of additional 5% margin starting 26th Dec is confusing and unwarranted.
Kindly clarify on the 5% additional margin part.
you mention “if you do not adjust the size of your positions to be in multiples of revised lot sizes” how??? the least qty comes to 975 ! (15lots of 65)
And there is no provision for me to adjust the lot size of long date options right now? (as system still goes will old lot) this is compulsory closure of positions. Holding till expiry will lead to additional margin as mentioned in email?
Such inconvenience !
thanks,
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Can you DM your client ID? We will get this checked.
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Sent via DM
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Is this 5% of the existing margin or 5% of the contract value? Please clarify
We see that you have several contracts nearing expiry. While the December 2025 contracts aren’t an issue, you do hold multiple quarterly contracts for March, June, and December 2026. Please note that the lot size for these contracts will change from 75 to 65 after December 30th 2025.
We suggest that you adjust your contract lot sizes to match the new lot size. Alternatively, you may also choose to close your positions to prevent the additional 5% from being blocked. If you do not take any action, the lot sizes for your contracts will automatically be updated to multiples of 65. Any remaining odd quantities will stay open until they expire, and an additional 5% will be blocked.
Here’s an example of your positions: You have a short position of 300 quantities in Nifty 26MAR 26000PE. After December 30, when you decide to close your March position, you will only be able to close 4 lots, totalling 260 quantities (4*65). The remaining 40 quantities will stay open and expire automatically on the March expiry date. For these 40 quantities, an additional 5% will be applied.
For example, Today’s Nifty close is at 25,986, the calculation would be: 40 * 25,986 * 0.05 = 51,972.
You can apply this calculation to the rest of your quarterly contracts.
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Your leftover odd quantity will be based on that day’s specific Nifty close price with an additional 5%.
For example, if you hold 75, your remaining odd quantity will be 10, calculated as 10 * Nifty close * 5%.
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The additional margin will be only on short options, right?
What about the long options?
One can’t close that additional odd lot part, need to wait till expiry, no additional margins in this case.
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Hello guys,
Least common multiple of 75 and 65 is 975. So, this is the lowest position size which can be traded in its entirety for both lot sizes. I’ll suggest rounding off your position in Nifty long-dated options to multiples of 975 if you don’t want to get into the hassle of holding a non-tradable position in your portfolio.
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Ugh, changing lot size for existing contracts is so annoying. 
I can’t even afford to 3x my position size from 375 to 975. 
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