Biogen (BIIB) Options Chain

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

225.71+7.28 (+3.33%)

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

Expiration date

Expiration: Mar 19, 2027
Days to expiration: 159
Share price: $225.71
Put/call ratio (OI): 0.78
Put/call ratio (volume): 0.15
ATM implied volatility: 42.3%
Expected move: ±$62.94
Open interest (C / P): 1.06K / 827

BIIB options summary

The BIIB options chain for the March 19, 2027 expiration lists 33 call and 27 put contracts, with 159 days until expiration. Open interest stands at 1,063 calls and 827 puts, a put/call ratio of 0.78, which is fairly balanced between calls and puts. At-the-money implied volatility near the $230.00 strike is 42.3%, which implies the market expects a move of about ±$62.94 (27.9%) in Biogen stock by expiration.

The most open interest sits at the $290.00 call (262 contracts) and the $140.00 put (118 contracts).

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

BIIB options chain · March 19, 2027

BIIB 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	1	90.0%	135.00	135.80	140.00	90.00	0.00	2.15	0.35	78.0%	2	20
3	—	—	88.08	100.50	105.00	95.00	0.00	2.15	0.40	73.8%	1	7
1	—	61.0%	111.00	122.00	126.20	100.00	0.00	2.20	0.45	70.2%	1	6
0	1	—	117.18	0.00	0.00	105.00	—	—	—	—	—	—
—	—	—	—	—	—	110.00	0.00	2.95	1.05	66.6%	1	5
—	—	—	—	—	—	115.00	0.00	2.40	0.70	60.4%	2	3
1	—	—	85.70	100.60	104.50	120.00	0.00	2.00	0.94	55.1%	2	4
5	5	67.7%	103.17	101.90	106.00	125.00	0.00	2.65	1.00	55.0%	1	10
—	—	—	—	—	—	130.00	0.00	2.85	1.40	52.6%	1	16
1	—	—	66.40	53.00	57.50	135.00	0.00	2.60	0.90	57.0%	8	33
0	—	—	69.05	0.00	0.00	140.00	0.00	3.20	1.20	56.8%	34	118
—	—	—	—	—	—	145.00	0.20	2.55	2.30	50.3%	1	36
11	8	57.0%	84.30	78.70	82.50	150.00	0.80	3.50	1.91	51.5%	1	58
4	4	55.5%	79.40	74.20	78.10	155.00	0.90	3.70	2.45	49.1%	1	11
3	2	54.2%	74.83	69.90	73.70	160.00	1.35	4.90	3.60	50.3%	3	15
6	10	52.9%	70.68	65.60	69.40	165.00	1.95	4.90	4.90	47.0%	1	16
36	44	51.6%	66.34	61.40	65.20	170.00	2.50	5.70	5.10	46.2%	9	99
10	20	50.5%	61.50	57.30	61.10	175.00	3.20	6.60	5.40	45.5%	7	22
5	8	53.9%	57.70	53.30	57.10	180.00	4.10	7.60	5.80	44.8%	3	60
3	6	52.6%	54.20	49.50	53.20	185.00	5.10	9.00	7.10	44.7%	3	19
12	4	51.6%	50.91	45.70	49.50	190.00	6.20	10.10	7.90	43.6%	1	16
21	2	49.5%	47.38	42.10	45.40	195.00	7.50	11.20	9.30	42.4%	1	66
53	2	49.9%	36.00	39.20	42.60	200.00	9.00	12.50	13.00	41.3%	4	116
53	3	48.1%	33.50	32.50	36.10	210.00	12.50	15.90	14.50	39.9%	1	23
152	518	46.1%	28.49	27.50	30.00	220.00	16.60	20.10	21.90	38.9%	5	15
BIIB $225.71
60	2	46.0%	26.72	21.70	25.50	230.00	21.50	25.30	24.80	38.5%	5	23
38	11	45.1%	17.77	17.00	21.10	240.00	—	—	—	—	—	—
135	5	44.4%	15.31	13.60	17.30	250.00	—	—	—	—	—	—
31	1	43.8%	12.10	10.30	14.10	260.00	—	—	—	—	—	—
9	1	42.7%	8.20	7.60	11.10	270.00	48.00	51.80	48.57	35.7%	1	9
26	2	43.8%	5.10	5.60	9.60	280.00	60.10	64.10	74.20	44.2%	—	1
262	1	43.8%	6.60	4.50	7.90	290.00	—	—	—	—	—	—
19	1	43.1%	4.50	2.50	6.20	300.00	—	—	—	—	—	—
21	3	42.8%	3.36	1.65	4.90	310.00	—	—	—	—	—	—
59	1	42.6%	1.90	1.15	3.90	320.00	—	—	—	—	—	—
11	1	45.1%	1.35	0.80	3.90	330.00	—	—	—	—	—	—
11	9	45.8%	1.10	0.65	3.40	340.00	—	—	—	—	—	—

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 BIIB put/call ratio?

For the March 19, 2027 expiration, the BIIB put/call ratio based on open interest is 0.78 (827 puts vs 1,063 calls), and 0.15 based on today's volume. A ratio above 1 means more puts than calls.

What is BIIB's implied volatility?

At-the-money implied volatility for BIIB options expiring March 19, 2027 is about 42.3%, an annualized estimate of how much the market expects Biogen stock to move.

How many BIIB option expiration dates are there?

BIIB has 14 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.