Sutro Biopharma (STRO) Options Chain
NASDAQ: STROHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Feb 19, 2027
- Days to expiration
- 132
- Share price
- $14.27
- Put/call ratio (OI)
- 0.92
- Put/call ratio (volume)
- 0.54
- Expected move
- ±$0.2686
- Open interest (C / P)
- 13 / 12
STRO options summary
The STRO options chain for the February 19, 2027 expiration lists 8 call and 5 put contracts, with 132 days until expiration. Open interest stands at 13 calls and 12 puts, a put/call ratio of 0.92, which is fairly balanced between calls and puts. At-the-money implied volatility near the $15.00 strike is 3.1%, which implies the market expects a move of about ±$0.2686 (1.9%) in Sutro Biopharma stock by expiration.
The most open interest sits at the $30.00 call (5 contracts) and the $12.50 put (7 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
STRO options chain · February 19, 2027
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 12.50 | 0.10 | 4.90 | 1.50 | |||||
| 10.00 | 0.00 | 0.00 | 15.00 | 0.00 | 0.00 | 3.00 | |||||
| 2.85 | 0.80 | 4.90 | 17.50 | 2.20 | 7.00 | 3.30 | |||||
| — | — | — | 20.00 | 0.00 | 0.00 | 4.40 | |||||
| 6.00 | 0.00 | 0.00 | 22.50 | — | — | — | |||||
| 2.51 | 0.25 | 4.90 | 25.00 | — | — | — | |||||
| 2.40 | 0.00 | 4.90 | 30.00 | — | — | — | |||||
| 2.56 | 0.00 | 4.90 | 35.00 | — | — | — | |||||
| 0.65 | 0.40 | 4.90 | 40.00 | 18.60 | 22.50 | 19.69 | |||||
| 1.65 | 0.00 | 0.00 | 45.00 | — | — | — | |||||
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 STRO put/call ratio?
For the February 19, 2027 expiration, the STRO put/call ratio based on open interest is 0.92 (12 puts vs 13 calls), and 0.54 based on today's volume. A ratio above 1 means more puts than calls.
What is STRO's implied volatility?
At-the-money implied volatility for STRO options expiring February 19, 2027 is about 3.1%, an annualized estimate of how much the market expects Sutro Biopharma stock to move.
How many STRO option expiration dates are there?
STRO has 4 listed expiration dates, from Oct 16, 2026 to May 21, 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.