Phathom Pharmaceuticals (PHAT) Options Chain
NASDAQ: PHATHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
After hours: 7.13 0.00%
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $7.13
- Put/call ratio (OI)
- 0.79
- Put/call ratio (volume)
- 0.06
- ATM implied volatility
- 318.2%
- Expected move
- ±$3.36
- Open interest (C / P)
- 121 / 96
PHAT options summary
The PHAT options chain for the October 16, 2026 expiration lists 4 call and 4 put contracts, with 8 days until expiration. Open interest stands at 121 calls and 96 puts, a put/call ratio of 0.79, which is fairly balanced between calls and puts. At-the-money implied volatility near the $7.50 strike is 318.2%, which implies the market expects a move of about ±$3.36 (47.1%) in Phathom Pharmaceuticals stock by expiration.
The most open interest sits at the $10.00 call (94 contracts) and the $7.50 put (49 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
PHAT options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 2.53 | 0.20 | 4.90 | 5.00 | 0.00 | 4.90 | 0.05 | |||||
| 0.25 | 0.00 | 0.75 | 7.50 | 0.10 | 4.90 | 0.65 | |||||
| 0.10 | 0.00 | 1.95 | 10.00 | 1.00 | 5.50 | 2.85 | |||||
| 0.05 | 0.00 | 4.90 | 12.50 | 3.50 | 8.00 | 5.74 | |||||
In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.
Frequently asked questions
What is the PHAT put/call ratio?
For the October 16, 2026 expiration, the PHAT put/call ratio based on open interest is 0.79 (96 puts vs 121 calls), and 0.06 based on today's volume. A ratio above 1 means more puts than calls.
What is PHAT's implied volatility?
At-the-money implied volatility for PHAT options expiring October 16, 2026 is about 318.2%, an annualized estimate of how much the market expects Phathom Pharmaceuticals stock to move.
How many PHAT option expiration dates are there?
PHAT has 6 listed expiration dates, from Oct 16, 2026 to Jan 21, 2028.
What does "in the money" mean?
A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.