Protagonist Therapeutics (PTGX) Options Chain
NASDAQ: PTGXHealth 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
- $143.73
- Put/call ratio (OI)
- 0.60
- Put/call ratio (volume)
- 1.00
- Expected move
- ±$27.65
- Open interest (C / P)
- 5 / 3
PTGX options summary
The PTGX options chain for the November 20, 2026 expiration lists 3 call and 3 put contracts, with 40 days until expiration. Open interest stands at 5 calls and 3 puts, a put/call ratio of 0.60, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $135.00 strike is 58.1%, which implies the market expects a move of about ±$27.65 (19.2%) in Protagonist Therapeutics stock by expiration.
The most open interest sits at the $115.00 call (2 contracts) and the $95.00 put (1 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
PTGX options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 95.00 | 0.00 | 4.90 | 0.20 | |||||
| 27.50 | 28.20 | 32.50 | 115.00 | — | — | — | |||||
| — | — | — | 125.00 | 0.00 | 3.90 | 2.96 | |||||
| — | — | — | 135.00 | 2.55 | 7.00 | 6.33 | |||||
| 5.02 | 3.30 | 5.00 | 155.00 | — | — | — | |||||
| 2.97 | 0.00 | 4.90 | 185.00 | — | — | — | |||||
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 November 20, 2026 expiration, the PTGX put/call ratio based on open interest is 0.60 (3 puts vs 5 calls), and 1.00 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 November 20, 2026 is about 58.1%, 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.