Zai Lab (ZLAB) Options Chain
NASDAQ: ZLABHealth 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
- $24.99
- Put/call ratio (OI)
- 1.17
- Put/call ratio (volume)
- 1.00
- Expected move
- ±$5.77
- Open interest (C / P)
- 23 / 27
ZLAB options summary
The ZLAB options chain for the November 20, 2026 expiration lists 4 call and 6 put contracts, with 40 days until expiration. Open interest stands at 23 calls and 27 puts, a put/call ratio of 1.17, which is fairly balanced between calls and puts. At-the-money implied volatility near the $25.00 strike is 69.7%, which implies the market expects a move of about ±$5.77 (23.1%) in Zai Lab stock by expiration.
The most open interest sits at the $35.00 call (10 contracts) and the $25.00 put (13 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ZLAB options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 17.50 | 0.00 | 5.00 | 0.40 | |||||
| — | — | — | 20.00 | 0.40 | 1.00 | 1.00 | |||||
| 5.40 | 1.40 | 6.00 | 22.50 | 0.10 | 5.00 | 1.30 | |||||
| 3.10 | 0.00 | 4.20 | 25.00 | 0.10 | 5.00 | 2.00 | |||||
| 2.00 | 0.00 | 4.00 | 30.00 | 3.20 | 7.90 | 5.50 | |||||
| 1.65 | 0.00 | 3.00 | 35.00 | 7.70 | 12.40 | 10.00 | |||||
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 ZLAB put/call ratio?
For the November 20, 2026 expiration, the ZLAB put/call ratio based on open interest is 1.17 (27 puts vs 23 calls), and 1.00 based on today's volume. A ratio above 1 means more puts than calls.
What is ZLAB's implied volatility?
At-the-money implied volatility for ZLAB options expiring November 20, 2026 is about 69.7%, an annualized estimate of how much the market expects Zai Lab stock to move.
How many ZLAB option expiration dates are there?
ZLAB has 6 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.