Protagonist Therapeutics (PTGX) Options Chain
NASDAQ: PTGXHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $139.91
- Put/call ratio (OI)
- 1.21
- Put/call ratio (volume)
- 1.34
- Expected move
- ±$0.0388
- Open interest (C / P)
- 56 / 68
PTGX options summary
The PTGX options chain for the October 16, 2026 expiration lists 30 call and 17 put contracts, with 7 days until expiration. Open interest stands at 56 calls and 68 puts, a put/call ratio of 1.21, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $140.00 strike is 0.2%, which implies the market expects a move of about ±$0.0388 (0.0%) in Protagonist Therapeutics stock by expiration.
The most open interest sits at the $65.00 call (32 contracts) and the $95.00 put (61 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
PTGX options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 99.40 | 0.00 | 0.00 | 50.00 | — | — | — | |||||
| 41.30 | 0.00 | 0.00 | 55.00 | — | — | — | |||||
| 46.00 | 46.50 | 50.50 | 60.00 | — | — | — | |||||
| 41.25 | 33.50 | 38.40 | 65.00 | — | — | — | |||||
| 76.00 | 0.00 | 0.00 | 70.00 | 0.00 | 0.00 | 3.30 | |||||
| 34.39 | 34.00 | 38.00 | 75.00 | — | — | — | |||||
| 60.30 | 0.00 | 0.00 | 80.00 | 3.10 | 7.90 | 5.40 | |||||
| 21.00 | 18.50 | 22.80 | 85.00 | 4.50 | 9.00 | 7.00 | |||||
| 62.18 | 0.00 | 0.00 | 90.00 | 0.00 | 0.00 | 0.35 | |||||
| 57.47 | 0.00 | 0.00 | 95.00 | 0.00 | 5.00 | 4.50 | |||||
| 36.50 | 53.10 | 58.00 | 100.00 | 0.00 | 0.00 | 0.55 | |||||
| 46.00 | 0.00 | 0.00 | 105.00 | 9.00 | 12.40 | 13.73 | |||||
| 36.57 | 0.00 | 0.00 | 110.00 | 0.00 | 0.00 | 1.40 | |||||
| 32.50 | 0.00 | 0.00 | 115.00 | 17.00 | 21.50 | 22.00 | |||||
| 22.00 | 0.00 | 0.00 | 120.00 | 0.00 | 0.00 | 4.32 | |||||
| 8.00 | 17.10 | 21.90 | 125.00 | 0.00 | 0.00 | 0.94 | |||||
| 26.00 | 0.00 | 0.00 | 130.00 | 0.00 | 0.00 | 2.25 | |||||
| 10.50 | 0.00 | 0.00 | 135.00 | 0.00 | 0.00 | 2.55 | |||||
| 5.00 | 0.00 | 0.00 | 140.00 | 0.00 | 0.00 | 5.00 | |||||
| 3.50 | 0.00 | 0.00 | 145.00 | 0.00 | 0.00 | 8.05 | |||||
| 2.90 | 0.00 | 0.00 | 150.00 | 0.00 | 0.00 | 16.70 | |||||
| 3.00 | 0.00 | 0.00 | 155.00 | — | — | — | |||||
| 3.50 | 0.00 | 0.00 | 160.00 | 0.00 | 0.00 | 16.55 | |||||
| 2.24 | 0.00 | 0.00 | 165.00 | — | — | — | |||||
| 0.80 | 0.00 | 0.00 | 170.00 | — | — | — | |||||
| 5.20 | 0.00 | 0.00 | 175.00 | — | — | — | |||||
| 1.85 | 0.00 | 0.00 | 180.00 | — | — | — | |||||
| 1.99 | 0.00 | 0.00 | 185.00 | — | — | — | |||||
| 3.70 | 0.00 | 0.00 | 190.00 | — | — | — | |||||
| 0.40 | 0.00 | 0.00 | 195.00 | — | — | — | |||||
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 PTGX put/call ratio?
For the October 16, 2026 expiration, the PTGX put/call ratio based on open interest is 1.21 (68 puts vs 56 calls), and 1.34 based on today's volume. A ratio above 1 means more puts than calls.
What is PTGX's implied volatility?
At-the-money implied volatility for PTGX options expiring October 16, 2026 is about 0.2%, an annualized estimate of how much the market expects Protagonist Therapeutics stock to move.
How many PTGX option expiration dates are there?
PTGX has 4 listed expiration dates, from Oct 16, 2026 to Apr 16, 2027.
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.