Zenas BioPharma (ZBIO) Options Chain
NASDAQ: ZBIOHealth 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
- $27.26
- Put/call ratio (OI)
- 0.09
- Put/call ratio (volume)
- 0.50
- Expected move
- ±$8.50
- Open interest (C / P)
- 11 / 1
ZBIO options summary
The ZBIO options chain for the November 20, 2026 expiration lists 5 call and 3 put contracts, with 40 days until expiration. Open interest stands at 11 calls and 1 puts, a put/call ratio of 0.09, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $25.00 strike is 94.2%, which implies the market expects a move of about ±$8.50 (31.2%) in Zenas BioPharma stock by expiration.
The most open interest sits at the $25.00 call (4 contracts) and the $22.50 put (1 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ZBIO options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 15.00 | 0.00 | 4.90 | 2.46 | |||||
| 6.30 | 1.20 | 6.00 | 20.00 | — | — | — | |||||
| 5.00 | 8.80 | 12.70 | 22.50 | 0.00 | 4.90 | 1.00 | |||||
| 4.80 | 2.00 | 6.20 | 25.00 | 0.50 | 4.90 | 1.45 | |||||
| 2.25 | 0.10 | 4.90 | 30.00 | — | — | — | |||||
| 4.25 | 1.75 | 6.00 | 35.00 | — | — | — | |||||
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 November 20, 2026 expiration, the ZBIO put/call ratio based on open interest is 0.09 (1 puts vs 11 calls), and 0.50 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 November 20, 2026 is about 94.2%, 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.