Janux Therapeutics (JANX) Options Chain
NASDAQ: JANXHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
After hours: 18.50 0.00%
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $18.50
- Put/call ratio (OI)
- 0.20
- Put/call ratio (volume)
- 5.82
- ATM implied volatility
- 124.9%
- Expected move
- ±$3.42
- Open interest (C / P)
- 510 / 103
JANX options summary
The JANX options chain for the October 16, 2026 expiration lists 6 call and 3 put contracts, with 8 days until expiration. Open interest stands at 510 calls and 103 puts, a put/call ratio of 0.20, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $17.50 strike is 124.9%, which implies the market expects a move of about ±$3.42 (18.5%) in Janux Therapeutics stock by expiration.
The most open interest sits at the $25.00 call (270 contracts) and the $17.50 put (49 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
JANX options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 3.16 | 1.45 | 4.50 | 15.00 | 0.00 | 0.70 | 0.50 | |||||
| 1.10 | 0.45 | 1.90 | 17.50 | 0.00 | 2.05 | 1.42 | |||||
| 0.05 | 0.10 | 0.30 | 20.00 | 0.00 | 3.80 | 3.18 | |||||
| 0.05 | 0.00 | 2.10 | 22.50 | — | — | — | |||||
| 0.10 | 0.00 | 2.15 | 25.00 | — | — | — | |||||
| 0.10 | 0.00 | 2.15 | 30.00 | — | — | — | |||||
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 JANX put/call ratio?
For the October 16, 2026 expiration, the JANX put/call ratio based on open interest is 0.20 (103 puts vs 510 calls), and 5.82 based on today's volume. A ratio above 1 means more puts than calls.
What is JANX's implied volatility?
At-the-money implied volatility for JANX options expiring October 16, 2026 is about 124.9%, an annualized estimate of how much the market expects Janux Therapeutics stock to move.
How many JANX option expiration dates are there?
JANX has 7 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.