Unverified record. The outcome below was inferred from the share-price reaction around this date. Nobody has confirmed it against an FDA, SEC or company document, and it may be wrong: we have published at least one inferred outcome that turned out to be impossible (see corrections). Treat it as a price observation, not as a regulatory fact. Verified decisions on this site always link a primary source.
Daily close, T-120 (12/13/24) through T+5. Run-up high $47.53 on 1/14/25, low $23.65 on 5/16/25 (T-120 to T-1). FDA decision 5/31/25. Historical price action, not a forecast.
Positioning before the decision
On May 16, 2025, 15 days before the decision date, at-the-money options priced a move of ±13.6% through Jun 6, 2025 (the first listed expiry after the decision; ATM implied volatility 71%). The stock closed +1.8% at the first close across the decision and +3.4% five trading days on. A straddle priced weeks out covers ordinary movement plus the event, so this is the move the options market priced through that expiry, not the event-implied move alone. How this compares across 1,000+ decisions.
Decision facts
FDA decision date2025-05-31
OutcomeUnconfirmed · price consistent with approval~ price-only (validating)
Decision-day move+1.8%
T-120 run-up (low→high)+8.0% ($23.65→$44.94)
ValidationOutcome consistent with price; primary-source verification in progress.
Market-cap tierLarge
Cohort decision-day move (history)1.0% median (n=835)
Cohort move is the historical median absolute decision-day move for this market-cap tier across our run-up study. History, not a prediction.