aTyr Pharma (ATYR) Options Chain
NASDAQ: ATYRHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $0.2462
- Put/call ratio (OI)
- 0.29
- Put/call ratio (volume)
- 0.57
- ATM implied volatility
- 340.6%
- Expected move
- ±$0.2776
- Open interest (C / P)
- 2.07K / 592
ATYR options summary
The ATYR options chain for the November 20, 2026 expiration lists 4 call and 3 put contracts, with 40 days until expiration. Open interest stands at 2,067 calls and 592 puts, a put/call ratio of 0.29, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $0.50 strike is 340.6%, which implies the market expects a move of about ±$0.2776 (112.8%) in aTyr Pharma stock by expiration.
The most open interest sits at the $1.00 call (1.40K contracts) and the $2.00 put (576 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ATYR options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.03 | 0.00 | 0.05 | 0.50 | 0.15 | 0.35 | 0.25 | |||||
| 0.03 | 0.00 | 0.05 | 1.00 | 0.00 | 1.00 | 0.72 | |||||
| 0.02 | 0.00 | 0.10 | 2.00 | 0.90 | 2.60 | 1.77 | |||||
| 0.05 | 0.00 | 0.00 | 4.00 | — | — | — | |||||
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 ATYR put/call ratio?
For the November 20, 2026 expiration, the ATYR put/call ratio based on open interest is 0.29 (592 puts vs 2,067 calls), and 0.57 based on today's volume. A ratio above 1 means more puts than calls.
What is ATYR's implied volatility?
At-the-money implied volatility for ATYR options expiring November 20, 2026 is about 340.6%, an annualized estimate of how much the market expects aTyr Pharma stock to move.
How many ATYR option expiration dates are there?
ATYR 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.