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BIIB

Biogen Inc.Close $212.55EOD only

Max Pain

$190.00

Next expiry Aug 21, 2026

Expected Move

±$4.85

2.3% from close

Price Gap

-22.55

Distance to max pain

IV Rank

Low premium

P/C OI

0.91

Balanced positioning

Consensus

—

No reports available

Published snapshot: Aug 18, 2026 close

End-of-day snapshot

This page reflects BIIB options positioning from the latest published market-close snapshot. Intraday price and contract changes are not displayed.

Published Snapshot

Aug 18, 2026 close

BIIB Options Chain

Data as of market close Aug 18, 2026

Expiration

Compare calls and puts side by side with OI, volume, IV, and positioning context.

Control Row

Next expiry (DTE 3)

Blank greek cells usually mean usable implied volatility was unavailable for that contract in the market-close snapshot.

Open Interest by Strike

IV Skew

Volume by Strike

Calls

Strike	Last	Bid	Ask	Chg	Vol	OI	IV	Delta	Gamma	Theta	Vega	Rho
110.00	90.90	100.80	104.70	0.00	0	1	282.0%	0.997	0.0002	-0.106	0.002	0.009
150.00	62.90	60.70	64.70	0.00	0	1	153.1%	0.995	0.0005	-0.087	0.003	0.012
160.00	44.10	51.00	54.70	0.00	1	1	142.4%	0.988	0.0011	-0.158	0.006	0.013
165.00	45.78	45.80	49.70	0.00	2	2	120.9%	0.991	0.0010	-0.113	0.005	0.013
170.00	40.16	40.70	44.70	0.00	412	278	103.7%	0.992	0.0011	-0.090	0.004	0.014
175.00	34.10	35.70	39.70	0.00	1	291	92.0%	0.991	0.0013	-0.090	0.005	0.014
180.00	25.85	30.80	34.70	0.00	2	7	84.4%	0.987	0.0021	-0.114	0.007	0.015
185.00	28.10	25.90	29.80	0.00	2	1	78.2%	0.977	0.0036	-0.157	0.010	0.015
190.00	20.34	20.80	24.70	0.00	1	12	60.7%	0.981	0.0040	-0.113	0.009	0.015
195.00	15.20	15.80	19.80	0.00	11	20	51.3%	0.970	0.0068	-0.133	0.013	0.015
197.50	11.43	13.30	17.30	0.00	3	3	87.5%	0.834	0.0148	-0.720	0.048	0.013
200.00	14.00	11.00	14.90	2.74	20	46	79.9%	0.811	0.0176	-0.713	0.052	0.013
202.50	5.50	8.50	12.60	0.00	2	4	73.3%	0.779	0.0210	-0.718	0.057	0.013
205.00	6.80	6.40	9.50	0.00	1	28	55.2%	0.775	0.0282	-0.550	0.058	0.013
207.50	6.15	4.30	8.30	2.34	7	31	61.6%	0.679	0.0302	-0.725	0.069	0.011
210.00	6.40	4.00	6.40	3.45	11	208	56.9%	0.605	0.0351	-0.718	0.074	0.010
212.50	3.65	0.80	4.00	1.45	5	35	44.8%	0.514	0.0462	-0.586	0.077	0.009
215.00	1.30	0.00	3.80	0.05	4	69	55.2%	0.422	0.0368	-0.704	0.075	0.007
217.50	1.05	0.00	3.30	0.46	2	11	60.4%	0.349	0.0318	-0.726	0.071	0.006
220.00	0.84	0.20	1.00	-0.53	2	539	39.3%	0.174	0.0339	-0.328	0.049	0.003
222.50	0.45	0.00	2.50	-0.77	42	11	50.8%	0.168	0.0256	-0.414	0.048	0.003
225.00	0.34	0.00	1.30	-0.18	2	41	58.9%	0.151	0.0206	-0.447	0.045	0.003
227.50	3.50	0.00	2.35	0.00	1	3	63.7%	0.127	0.0169	-0.428	0.040	0.002
230.00	0.15	0.00	0.50	0.00	16	184	55.1%	0.061	0.0113	-0.214	0.023	0.001
232.50	0.15	0.00	1.15	0.00	1	21	62.7%	0.061	0.0100	-0.246	0.023	0.001
235.00	1.10	0.00	1.35	0.00	1	15	70.9%	0.064	0.0091	-0.286	0.024	0.001
240.00	0.10	0.00	0.15	0.00	49	244	54.3%	0.007	0.0020	-0.036	0.004	0.000
245.00	0.55	0.00	1.15	0.00	0	1	88.6%	0.042	0.0053	-0.257	0.017	0.001
250.00	0.15	0.00	1.35	0.00	5	19	101.6%	0.043	0.0047	-0.301	0.018	0.001
255.00	0.16	0.00	2.15	0.00	1	1	123.3%	0.058	0.0049	-0.462	0.022	0.001
260.00	1.10	0.00	2.15	0.00	1	7	132.9%	0.054	0.0043	-0.468	0.021	0.001
270.00	0.48	0.00	2.15	0.00	4	8	151.0%	0.047	0.0034	-0.476	0.019	0.001
300.00	0.23	0.00	2.15	0.00	2	4	199.2%	0.035	0.0020	-0.491	0.015	0.001

Puts

Strike	Last	Bid	Ask	Chg	Vol	OI	IV	Delta	Gamma	Theta	Vega	Rho
100.00	0.25	0.00	0.10	0.00	0	2	271.1%	-0.001	0.0000	-0.021	0.000	-0.000
105.00	0.11	0.00	0.10	0.00	0	0	254.7%	-0.001	0.0001	-0.021	0.001	-0.000
110.00	1.23	0.00	2.15	0.00	0	10	370.6%	-0.017	0.0006	-0.491	0.008	-0.000
115.00	1.23	0.00	2.15	0.00	0	10	348.7%	-0.018	0.0007	-0.490	0.008	-0.000
150.00	0.64	0.00	0.15	0.00	0	1	139.8%	-0.002	0.0003	-0.034	0.001	-0.000
155.00	1.52	0.00	2.15	0.00	1	1	199.4%	-0.033	0.0019	-0.470	0.014	-0.001
165.00	1.23	0.00	2.15	0.00	1	4	167.0%	-0.040	0.0027	-0.461	0.017	-0.001
170.00	1.33	0.00	2.15	0.00	1	15	151.3%	-0.045	0.0032	-0.456	0.018	-0.001
175.00	0.25	0.00	1.35	0.00	5	22	121.6%	-0.034	0.0032	-0.295	0.015	-0.001
180.00	0.80	0.00	0.40	0.00	10	31	84.4%	-0.013	0.0021	-0.092	0.007	-0.000
185.00	0.05	0.00	1.15	0.00	12	110	89.7%	-0.040	0.0050	-0.247	0.017	-0.001
187.50	4.04	0.00	1.15	0.00	0	1	82.9%	-0.044	0.0058	-0.245	0.018	-0.001
190.00	0.10	0.00	0.70	0.00	12	527	67.9%	-0.032	0.0054	-0.154	0.014	-0.001
192.50	1.25	0.00	1.15	0.00	0	1	69.1%	-0.053	0.0081	-0.238	0.021	-0.001
195.00	0.05	0.00	0.15	0.00	6	87	46.4%	-0.019	0.0051	-0.068	0.009	-0.000
200.00	0.18	0.00	0.50	-0.53	6	83	46.3%	-0.069	0.0150	-0.197	0.026	-0.001
202.50	0.35	0.00	2.15	0.00	10	273	50.6%	-0.139	0.0227	-0.356	0.043	-0.002
205.00	0.85	0.00	1.10	-0.25	2	46	42.7%	-0.168	0.0305	-0.339	0.048	-0.003
207.50	1.70	0.00	2.70	0.00	1	14	54.8%	-0.303	0.0331	-0.607	0.067	-0.005
210.00	1.43	0.40	3.50	-1.52	7	41	52.9%	-0.389	0.0376	-0.641	0.074	-0.007
212.50	2.32	0.50	4.40	-2.70	2	10	49.9%	-0.486	0.0415	-0.626	0.077	-0.009
220.00	9.15	6.10	9.80	-18.03	7	10	58.2%	-0.732	0.0294	-0.596	0.063	-0.014
230.00	25.80	15.50	19.00	0.00	0	1	77.1%	-0.862	0.0148	-0.522	0.042	-0.017
240.00	25.80	25.40	29.10	-8.70	2	3	104.3%	-0.891	0.0093	-0.599	0.036	-0.018

How to Read the Chain

Use this market-close chain snapshot to compare liquidity, pricing, IV, and per-contract greeks across the active expiration.

How to scan it

Start with strike, bid/ask spread, open interest, and volume. Then use IV and greeks to decide whether a contract fits your directional, income, or volatility idea.

What matters first

Clean fills matter before a contract looks mathematically attractive. A thin market can erase the edge you think you found.

What can mislead you

Low premium, high IV, or one convenient delta do not make a trade by themselves. Check how far the strike sits from spot, expected move, and the event calendar.

Greeks are close-of-day estimates, and blank greek cells usually mean usable implied volatility was unavailable for that contract.