Zenas BioPharma (ZBIO) Options Chain
NASDAQ: ZBIOHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
After hours: 26.24 0.00%
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $26.24
- Put/call ratio (OI)
- 3.23
- Put/call ratio (volume)
- 40.00
- ATM implied volatility
- 110.8%
- Expected move
- ±$4.31
- Open interest (C / P)
- 13 / 42
ZBIO options summary
The ZBIO options chain for the October 16, 2026 expiration lists 5 call and 3 put contracts, with 8 days until expiration. Open interest stands at 13 calls and 42 puts, a put/call ratio of 3.23, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $25.00 strike is 110.8%, which implies the market expects a move of about ±$4.31 (16.4%) in Zenas BioPharma stock by expiration.
The most open interest sits at the $35.00 call (9 contracts) and the $25.00 put (40 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ZBIO options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 10.50 | 6.80 | 11.00 | 17.50 | — | — | — | |||||
| — | — | — | 25.00 | 0.00 | 2.45 | 0.94 | |||||
| 3.17 | 0.00 | 1.85 | 30.00 | 2.00 | 6.00 | 2.50 | |||||
| 0.10 | 0.00 | 1.40 | 35.00 | 7.00 | 10.50 | 4.90 | |||||
| 1.35 | 0.00 | 4.90 | 40.00 | — | — | — | |||||
| 0.70 | 0.00 | 4.90 | 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 ZBIO put/call ratio?
For the October 16, 2026 expiration, the ZBIO put/call ratio based on open interest is 3.23 (42 puts vs 13 calls), and 40.00 based on today's volume. A ratio above 1 means more puts than calls.
What is ZBIO's implied volatility?
At-the-money implied volatility for ZBIO options expiring October 16, 2026 is about 110.8%, an annualized estimate of how much the market expects Zenas BioPharma stock to move.
How many ZBIO option expiration dates are there?
ZBIO has 7 listed expiration dates, from Oct 16, 2026 to Dec 17, 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.