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Stockfacts

EOD US-equity data for investors and AI agents

Data is end-of-day, not real-time, and not investment advice

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Options · BIIB

As of 2026-08-20
Put/Call Volume Ratio
0.84
Neutral
Put/Call OI Ratio
0.79
Cumulative positioning sentiment
Front-month ATM Implied Volatility
38.6%
Market-expected move
Contracts / Expirations
324
9 expirations
CallStrikePut
OIVolIVBidAskStrikeBidAskIVVolOI
–––––110.000.000.20146.8%010
–––––115.000.000.20138.1%010
–––––145.000.002.1589.3%01
–––––165.000.002.1562.0%01
1070.8%33.0036.80180.000.002.1542.5%02
–––––185.000.002.2036.6%08
–––––187.500.002.2533.7%012
1056.1%23.2026.90190.000.002.3030.8%03
1050.3%18.3022.10195.000.002.4524.9%04
–––––197.500.002.3022.0%01
16045.4%13.7017.50200.000.001.0019.0%09
–––––202.500.003.1016.1%03
6040.5%9.3013.00205.000.353.9045.4%105
9139.5%7.5011.00207.500.054.2038.6%017
14739.5%5.509.50210.001.104.7038.6%1621
5139.5%4.108.00212.501.605.5035.6%23
184438.6%2.806.50215.00–––––
7038.6%1.655.50217.50–––––
657344.4%2.204.50220.005.709.5033.7%02
7041.5%0.454.10222.50–––––
19013.2%0.003.60225.00–––––
1016.1%0.002.20227.50–––––
14018.1%0.002.90230.00–––––
1021.0%0.002.70232.50–––––
1023.0%0.002.85235.00–––––
8027.8%0.001.00240.00–––––
1032.7%0.002.45245.00–––––
3045.4%0.001.90260.00–––––
24061.0%0.002.15280.00–––––
Click a call or put in the chain to see its history.

Source: Alpha Vantage options chain EOD (incl. greeks / IV / open interest). Contracts with low liquidity, far expirations (>180 days), and deep out-of-the-money strikes (±50%) are filtered out. P/C ratios are aggregated across the full chain.