Halozyme Therapeutics (HALO) Options Chain

NASDAQ: HALOHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD

110.42+0.58 (+0.53%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Mar 19, 2027
Days to expiration: 159
Share price: $110.42
Put/call ratio (OI): 0.09
Put/call ratio (volume): 0.43
ATM implied volatility: 43.2%
Expected move: ±$31.50
Open interest (C / P): 3.81K / 332

HALO options summary

The HALO options chain for the March 19, 2027 expiration lists 21 call and 13 put contracts, with 159 days until expiration. Open interest stands at 3,806 calls and 332 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 43.2%, which implies the market expects a move of about ±$31.50 (28.5%) in Halozyme Therapeutics stock by expiration.

The most open interest sits at the $140.00 call (1.77K contracts) and the $110.00 put (89 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

HALO options chain · March 19, 2027

HALO calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
1	—	81.5%	38.00	64.10	68.20	45.00	—	—	—	—	—	—
19	9	75.8%	62.60	59.20	63.40	50.00	—	—	—	—	—	—
—	—	—	—	—	—	60.00	0.00	0.00	0.54	25.0%	—	0
0	2	—	31.30	0.00	0.00	70.00	0.00	2.45	1.05	51.4%	2	2
21	19	51.7%	38.68	35.70	39.10	75.00	0.00	0.00	3.10	12.5%	1	0
15	17	50.3%	34.12	31.20	35.10	80.00	0.00	0.00	1.95	12.5%	1	0
47	1	55.4%	27.40	26.90	30.30	85.00	0.30	4.00	2.10	50.8%	6	19
396	46	52.1%	23.30	22.80	26.20	90.00	1.95	2.80	3.00	37.4%	1	6
143	2	49.5%	19.70	19.20	22.40	95.00	1.75	5.90	4.60	44.9%	1	32
73	4	47.6%	16.50	15.70	19.00	100.00	3.20	6.80	5.40	40.8%	1	24
63	2	46.4%	15.50	12.80	16.00	105.00	5.20	8.80	7.60	40.0%	5	54
44	7	46.7%	12.30	9.90	13.70	110.00	7.50	11.30	9.40	39.8%	39	89
HALO $110.42
28	1	47.3%	9.60	7.70	11.80	115.00	10.50	14.00	13.20	39.1%	1	45
264	2	46.3%	8.50	6.00	9.70	120.00	13.70	17.00	14.30	38.3%	—	57
621	1	45.7%	5.90	4.10	8.00	125.00	16.60	20.50	16.60	38.3%	—	4
31	2	45.8%	5.00	2.80	6.70	130.00	—	—	—	—	—	—
7	5	44.4%	4.00	1.75	5.20	135.00	—	—	—	—	—	—
1,771	10	46.2%	2.70	1.30	4.70	140.00	—	—	—	—	—	—
1	1	45.8%	1.95	0.80	3.80	145.00	—	—	—	—	—	—
2	—	45.6%	2.00	0.05	3.10	150.00	—	—	—	—	—	—
257	4	49.1%	1.20	0.05	3.20	155.00	—	—	—	—	—	—
2	—	50.6%	1.35	0.05	2.95	160.00	—	—	—	—	—	—

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 March 19, 2027 expiration, the HALO put/call ratio based on open interest is 0.09 (332 puts vs 3,806 calls), and 0.43 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 March 19, 2027 is about 43.2%, 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.