BIIB Options Chain by Expiration – Open Interest & Put/Call Ratio

Explore the BIIB options chain aggregated by expiration date, with call and put open interest, total OI and put/call ratios. Use this overview to spot where options positioning is most concentrated and which expirations carry bullish, bearish or neutral sentiment for BIIB.

Options Analysis Short-Term Forecast Short Interest Report

Market Sentiment from BIIB Options by Expiration Date

The table below aggregates BIIB options data by expiration date, including call volume, put volume, total open interest and the put/call ratio. Each row is assigned a sentiment label and numerical sentiment score, highlighting expirations where positioning is extremely bullish, defensive or balanced. Click on an expiration date to drill down into the detailed options chain for that maturity.

Expiration Date	Call OI	Put OI	Total Open Interest	Put/Call Ratio
2026-07-17	12388	7473	19861	0.603
2026-07-24	348	74	422	0.213
2026-07-31	437	60	497	0.137
2026-08-07	611	388	999	0.635
2026-08-14	9	96	105	10.667
2026-08-21	769	798	1567	1.038
2026-09-18	4250	4721	8971	1.111
2026-10-16	968	503	1471	0.520
2026-12-18	3192	3042	6234	0.953
2027-01-15	5073	5142	10215	1.014
2027-03-19	543	379	922	0.698
2027-06-17	779	204	983	0.262
2028-01-21	2750	1024	3774	0.372
How the Options Sentiment Score Is Calculated This sentiment framework evaluates market bias for BIIB based on aggregated options data by expiration date. The key metrics are: Put/Call Ratio (PCR): Compares put and call activity. A higher PCR usually indicates more defensive or bearish positioning, while a lower PCR suggests bullish call demand. Open Interest (OI): Represents the number of outstanding option contracts. Higher open interest reflects strong market attention, hedging activity or speculative positioning around BIIB. Unusual activity ⚠️: Expirations with extreme PCR or unusually high OI are flagged with a warning icon, signaling concentrated bets, hedging pressure or potential event-driven risk. The sentiment score combines PCR and OI into a 0–100 scale, then classifies each expiration into intuitive labels such as Strong Bullish, Moderate Bullish, Neutral, Moderate Bearish, Strong Bearish. Higher scores reflect more aggressive bullish positioning in BIIB options, while lower scores highlight more defensive or bearish structures.