Nifty was green and your options were red. Both are true.
Premium P&L is not a scaled copy of the index move, and your journal should stop pretending it is.
The most common misreading in an options journal is treating index direction as the explanation for the day.
The index went up, so a bullish position should have made money. Except premium responds to direction, to time, and to volatility all at once, and on plenty of days the last two win.
Log the index reference alongside the premium
Two columns: what the underlying did while you held, and what your premium did. Once those sit next to each other for a month, the days where they disagree become the interesting ones.
Index move for the week. The option book that week finished red on Monday and Thursday because of volatility crush and decay.
Tag the position type after the fact
Short premium, long premium, spread, directional. Without that tag, a green week gets remembered as a good market read when it was actually a quiet tape paying a seller.
Long option, right direction
- Index moved your way
- Implied volatility fell
- Time decay over a weekend
- Premium still ended lower
Short option, wrong direction
- Index moved against you
- But volatility collapsed
- And expiry was close
- Position still finished green
Volatility is context, never a signal from us
Recording the implied volatility on the day you traded is useful history. Turning that into an instruction to sell or buy premium is somebody else’s business — a journal has no view on what you should trade tomorrow.
Key takeaways
- Store the underlying reference next to the premium fills.
- Tag short premium separately from directional bets.
- Keep volatility as recorded context, not as a prompt.
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.