PANW's put midpoint finished 10% below the scenario estimate
OptionsPeek estimated a $32.94 indicative midpoint for the Dec. 18 $370 put under a 7% stock-decline scenario with IV held constant. At 9:32 a.m. Eastern, the midpoint was $29.65 after PANW had fallen 5.11% from the base stock price.
- Planned move
- -7.00%
- Observed move at 9:32 a.m. ET
- -5.11%
- Estimated option price
- $32.94
- Observed option price
- $29.65
- Option price before
- $22.13
- Option price gap
- 10% below
The stock declined less than the 7% scenario
The observed indicative put midpoint was 9.98% below the estimate, a rounded difference of $3.29. PANW moved from $394.49 to $374.33, a 5.11% decline, versus the planned $366.88 target under a 7% decline scenario. Implied volatility rose from 59.82% to 59.97%, a 0.15-point change from the hold-constant assumption. The estimate used rounded delta and gamma in its saved calculation input, with IV held constant and no elapsed-time change. The prior-session bid and ask were $20.87 and $23.39; at 9:32 a.m. Eastern they were $26.92 and $32.38. The $5.46 after-open spread exceeded the $3.29 midpoint gap, limiting a precise reading of the comparison. These indicative quotes are provider-derived rather than actual OPRA quotes or executable prices.
PANW fell 5.11% rather than 7%; its put midpoint was below the estimate while IV was nearly unchanged and spreads were wide.
Review the captured assumptions
Scenario: $394.49 base stock price, -7.00% move, $366.88 target, with IV set to hold constant.
Planning data: Prior-session indicative option midpoint (provider-derived, not an OPRA quote) with OptionsPeek-aligned estimated Greeks and IV, timestamped 2026-10-28T19:59:59.556Z.
Comparison: mid at 2026-10-29T13:32:49.509Z. The owner approved this case after reviewing the proposed source. Codex checked the baseline, estimate, same-contract outcome, spread, stock and IV path, arithmetic, and references.