When twelve fills were secretly one idea
A busy blotter can still be a single bet on a single expiry. Split the day and find out.
A day with twelve fills feels diversified. It rarely is.
Split the P&L by symbol and by expiry and the same picture keeps showing up in retail books: one index, one weekly contract, both sides of a position that was never really hedged.
Split the pie before you tell the story
Contribution by symbol is a two-minute chart and it settles a lot of arguments. If four fifths of a month came from one contract, then that month is a report card on one contract.
This is description, not a diversification lecture. Some of the best retail books are deliberately narrow.
Illustrative journal data, not a live book and not a performance claim.
Then split by days-to-expiry
Weekly expiry contracts pull an enormous share of Indian retail volume, and since September 2025 the calendar itself changed: NSE index and stock derivatives expire on Tuesday, BSE on Thursday.
If your P&L piles into one or two days-to-expiry buckets, that is your actual sport. Own it in the review instead of describing yourself as a swing trader.
Illustrative journal data, not a live book and not a performance claim. Expiry weekday itself is set by exchange circular.
Keep open risk on a separate page
Closed-book concentration and overnight delta are two different questions. Positions and holdings screens answer the second one. Mixing them into a single headline number produces a figure that means nothing to anybody.
Key takeaways
- Split P&L by symbol and by expiry at least once a month.
- Days-to-expiry buckets describe what you actually trade.
- Do not merge closed-book stats with open-position risk.
Where these numbers come from
Not advice, not a call. NiyataBook is a personal trading journal, not a SEBI-registered investment adviser or research analyst. Everything above looks backwards at trades that already closed. What happened in a book does not promise what happens next, and F&O can take a year’s savings in a week.