Phathom Pharmaceuticals (PHAT) Options Chain
NASDAQ: PHATHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $7.25
- Put/call ratio (OI)
- 0.67
- Put/call ratio (volume)
- 0.15
- ATM implied volatility
- 110.7%
- Expected move
- ±$2.66
- Open interest (C / P)
- 2.17K / 1.45K
PHAT options summary
The PHAT options chain for the November 20, 2026 expiration lists 9 call and 3 put contracts, with 40 days until expiration. Open interest stands at 2,170 calls and 1,450 puts, a put/call ratio of 0.67, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $7.50 strike is 110.7%, which implies the market expects a move of about ±$2.66 (36.7%) in Phathom Pharmaceuticals stock by expiration.
The most open interest sits at the $15.00 call (1.07K contracts) and the $7.50 put (1.44K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
PHAT options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 5.10 | 2.50 | 7.00 | 2.50 | — | — | — | |||||
| 7.50 | 3.50 | 8.00 | 5.00 | — | — | — | |||||
| 2.00 | 0.10 | 2.85 | 7.50 | 0.15 | 1.25 | 1.42 | |||||
| 0.20 | 0.10 | 4.50 | 10.00 | 0.80 | 5.50 | 2.81 | |||||
| 0.10 | 0.00 | 5.00 | 12.50 | 3.10 | 8.00 | 4.50 | |||||
| 0.05 | 0.00 | 0.60 | 15.00 | — | — | — | |||||
| 0.30 | 0.00 | 0.00 | 17.50 | — | — | — | |||||
| 0.50 | 0.00 | 0.00 | 20.00 | — | — | — | |||||
| 0.95 | 0.00 | 4.90 | 25.00 | — | — | — | |||||
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 November 20, 2026 expiration, the PHAT put/call ratio based on open interest is 0.67 (1,450 puts vs 2,170 calls), and 0.15 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 November 20, 2026 is about 110.7%, 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.