Halozyme Therapeutics (HALO) Options Chain
NASDAQ: HALOHealth 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
- $110.42
- Put/call ratio (OI)
- 0.09
- Put/call ratio (volume)
- 0.80
- Expected move
- ±$18.50
- Open interest (C / P)
- 1.12K / 106
HALO options summary
The HALO options chain for the November 20, 2026 expiration lists 8 call and 7 put contracts, with 40 days until expiration. Open interest stands at 1,117 calls and 106 puts, a put/call ratio of 0.09, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $110.00 strike is 50.6%, which implies the market expects a move of about ±$18.50 (16.8%) in Halozyme Therapeutics stock by expiration.
The most open interest sits at the $110.00 call (795 contracts) and the $115.00 put (45 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
HALO options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 85.00 | 0.00 | 1.35 | 1.12 | |||||
| 22.00 | 19.20 | 23.20 | 90.00 | — | — | — | |||||
| — | — | — | 95.00 | 0.55 | 2.10 | 0.84 | |||||
| 14.25 | 11.30 | 14.10 | 100.00 | 0.50 | 3.60 | 1.96 | |||||
| 9.25 | 7.50 | 10.80 | 105.00 | 2.05 | 3.60 | 3.12 | |||||
| 5.20 | 4.30 | 7.90 | 110.00 | 3.20 | 7.00 | 5.00 | |||||
| 4.71 | 3.80 | 6.00 | 115.00 | 6.00 | 9.60 | 7.89 | |||||
| 3.05 | 0.95 | 2.55 | 120.00 | 10.00 | 13.00 | 14.62 | |||||
| 1.41 | 0.20 | 2.60 | 125.00 | — | — | — | |||||
| 0.90 | 0.30 | 2.05 | 130.00 | — | — | — | |||||
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 HALO put/call ratio?
For the November 20, 2026 expiration, the HALO put/call ratio based on open interest is 0.09 (106 puts vs 1,117 calls), and 0.80 based on today's volume. A ratio above 1 means more puts than calls.
What is HALO's implied volatility?
At-the-money implied volatility for HALO options expiring November 20, 2026 is about 50.6%, an annualized estimate of how much the market expects Halozyme Therapeutics stock to move.
How many HALO option expiration dates are there?
HALO 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.