How it unfolds, step by step
The setup
Instrument Y has a scheduled announcement on day 8. From day 1 the at-the-money premium climbs from ₹95 to ₹150, while the underlying goes almost nowhere. The rise is not a view about direction. It is the market paying more for uncertainty as the date approaches.
What happens next
The announcement lands on day 8. The underlying moves about 1.2%, in the direction a holder of this option wanted. The premium opens the next session at ₹96.
What it means — and does not
The underlying moved the right way and the premium fell by more than a third. The market had added ₹55 of extra time value for the unknown. That value was released the instant the unknown became known. The 1.2% move was not large enough to replace it with intrinsic value. Nothing here is a market opinion. It is what happens to the price of an unknown once it is known.
- Option premium (₹)
- Premium before the build-up · 95
Premium climbs into a scheduled day-8 event on a flat underlying. It then falls back below where it started once the event resolves.
Show the underlying data
| Day | Option premium (₹) |
|---|---|
| 1 | 95 |
| 2 | 101 |
| 3 | 109 |
| 4 | 118 |
| 5 | 128 |
| 6 | 138 |
| 7 | 150 |
| 8 | 148 |
| 9 | 96 |
| 10 | 89 |
| 11 | 83 |
| 12 | 76 |
What this does not establish
The reading is that the pre-event build-up is uncertainty being priced, rather than direction being predicted. That is refuted if the premium keeps rising after the event on the same . That would mean the market had NOT resolved the uncertainty. Either the announcement raised more questions than it settled, or a second dated event sits behind it. The practical test is the calendar. Check whether another scheduled event falls before this , because the crush lands on the LAST unknown, not the first.
Things to check
4Is there a scheduled, dated event before this expiry?
How much of the current premium was added in the sessions running up to it?
How large would the move have to be to replace that time value with intrinsic value?
Remember: this example shows how a mechanic works. It is not a view on any event.
Common mistakes
2Reading a rising pre-event premium as the market predicting the direction of the outcome. Both sides usually rise together.
Measuring the trade only against the direction of the move, when the premium had already priced a move of its own size.
Premium builds for a week into a scheduled announcement while the underlying stays flat. What is being priced?
- The direction the announcement is expected to take
- A shortage of sellers before the date
- The uncertainty itself, which is released once the outcome is known
Show the answer
C. The uncertainty itself, which is released once the outcome is known
A dated unknown widens the range of outcomes an option has to cover, and calls and puts usually build together — which is the giveaway that direction is not what is being paid for. When the outcome lands, that portion of the value has nothing left to represent.
Frequently asked
3What is implied volatility?
The market's assumption, backed out of the option's own price, about how much the underlying will move before expiry. It is derived from the premium rather than measured from the past.
Why do premiums rise before a known event?
Because a dated unknown widens the range of outcomes the option has to cover, and a wider range is worth more. That extra value is released once the outcome is known.
Does a volatility crush hit calls and puts alike?
The collapse in the volatility component affects both. What separates them afterwards is the direction and size of the actual move, which adds intrinsic value on one side only.