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: Jan 15, 2027
Days to expiration: 96
Share price: $225.71
Put/call ratio (OI): 1.04
Put/call ratio (volume): 0.38
ATM implied volatility: 41.4%
Expected move: ±$47.95
Open interest (C / P): 6.75K / 7.05K

BIIB options summary

The BIIB options chain for the January 15, 2027 expiration lists 41 call and 37 put contracts, with 96 days until expiration. Open interest stands at 6,754 calls and 7,055 puts, a put/call ratio of 1.04, which is fairly balanced between calls and puts. At-the-money implied volatility near the $230.00 strike is 41.4%, which implies the market expects a move of about ±$47.95 (21.2%) in Biogen stock by expiration.

The most open interest sits at the $230.00 call (1.05K contracts) and the $110.00 put (1.10K contracts).

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

BIIB options chain · January 15, 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
0	5	—	137.00	0.00	0.00	60.00	0.00	2.15	0.15	140.8%	8	18
1	1	—	68.40	67.00	71.50	65.00	0.00	4.80	2.70	155.9%	1	1
11	2	—	115.00	113.00	117.00	70.00	0.00	4.00	0.52	141.4%	1	12
18	1	—	134.00	145.40	149.60	75.00	0.00	1.75	0.80	114.1%	5	26
53	38	113.9%	142.90	144.80	149.00	80.00	0.05	3.30	2.64	121.9%	6	17
49	1	107.8%	142.80	139.80	144.00	85.00	0.00	2.00	1.74	104.4%	1	43
0	1	—	111.00	0.00	0.00	90.00	0.00	1.95	0.45	98.4%	3	23
7	3	—	86.42	99.60	103.30	95.00	0.00	0.00	0.20	25.0%	3	0
0	1	—	106.22	0.00	0.00	100.00	0.00	2.25	0.31	90.5%	1	1,070
15	1	—	104.60	116.10	120.00	105.00	1.05	1.85	2.25	90.0%	1	823
57	1	86.8%	114.41	115.20	119.40	110.00	0.00	2.30	1.14	81.4%	1	1,099
21	2	84.8%	109.28	110.40	114.70	115.00	0.00	2.30	0.58	76.9%	2	527
50	1	80.6%	103.65	105.50	109.70	120.00	0.00	2.00	0.98	70.7%	4	346
13	2	76.6%	99.62	100.50	104.80	125.00	0.00	2.40	0.20	69.2%	1	64
0	1	—	92.00	0.00	0.00	130.00	0.00	2.70	1.05	66.8%	10	135
34	2	68.2%	86.50	90.80	94.50	135.00	0.00	0.00	1.10	25.0%	1	0
59	1	65.3%	80.20	85.90	89.70	140.00	0.00	2.60	0.90	58.7%	2	47
28	3	—	52.00	55.60	59.00	145.00	0.00	0.00	1.60	12.5%	4	0
372	1	60.2%	63.67	76.30	80.10	150.00	0.00	1.00	1.18	48.7%	2	329
0	2	—	59.95	0.00	0.00	155.00	0.00	3.00	1.85	59.3%	1	190
36	3	55.1%	67.11	66.80	70.50	160.00	0.00	3.10	2.35	56.0%	1	227
15	1	53.0%	60.50	62.10	65.90	165.00	1.00	3.30	2.92	53.1%	2	104
69	1	51.3%	60.05	57.60	61.30	170.00	0.55	3.20	1.85	48.9%	1	63
149	8	57.0%	53.14	53.00	56.90	175.00	0.75	4.40	4.80	50.2%	10	109
534	5	54.8%	45.27	48.60	52.50	180.00	1.30	4.30	2.80	45.9%	3	360
94	11	53.1%	46.20	45.00	48.30	185.00	1.85	5.50	3.60	46.3%	1	27
51	1	51.4%	45.15	40.40	44.20	190.00	2.65	6.00	4.90	43.9%	7	54
56	6	50.0%	41.79	36.50	40.30	195.00	3.70	7.20	5.70	43.3%	1	575
244	1	48.4%	35.90	33.30	36.40	200.00	5.40	8.30	7.40	42.1%	1	622
685	5	47.0%	23.92	26.00	29.80	210.00	8.00	11.30	10.68	40.5%	1	80
164	20	43.5%	22.57	19.60	22.90	220.00	11.80	15.20	15.00	39.1%	2	32
BIIB $225.71
1,049	1	43.8%	14.50	15.10	18.40	230.00	16.60	20.50	18.56	39.1%	1	11
830	1	42.1%	10.68	10.50	13.80	240.00	22.50	26.20	34.85	38.0%	1	10
821	4	42.9%	7.51	7.50	11.00	250.00	29.30	33.00	42.54	37.6%	2	2
382	97	42.8%	6.50	4.50	8.40	260.00	36.70	40.50	34.90	37.2%	1	9
39	2	40.9%	4.75	3.00	5.70	270.00	—	—	—	—	—	—
623	1	42.1%	3.50	1.80	4.60	280.00	0.00	0.00	67.60	—	—	0
47	2	44.6%	2.05	1.05	4.10	290.00	—	—	—	—	—	—
74	2	44.6%	1.40	0.75	3.10	300.00	175.00	180.00	170.50	277.4%	—	0
4	—	44.0%	1.30	0.40	2.20	310.00	—	—	—	—	—	—
0	3	12.5%	1.35	0.00	0.00	320.00	—	—	—	—	—	—

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 January 15, 2027 expiration, the BIIB put/call ratio based on open interest is 1.04 (7,055 puts vs 6,754 calls), and 0.38 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 January 15, 2027 is about 41.4%, 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.