Biogen Inc. (BIIB)
NASDAQ: BIIB
· Real-Time Price · USD
159.88
4.63 (2.98%)
At close: Oct 03, 2025, 3:59 PM
159.00
-0.55%
After-hours: Oct 03, 2025, 07:58 PM EDT
BIIB Gamma Exposure By Expiry
The total Gamma Exposure (GEX) for BIIB across all expirations is -6,533.16 shares per 1% move, with 45,405.11 from calls and 51,938.27 from puts. The put-call GEX ratio of 1.14 indicates heavy put positioning, suggesting market makers may need to buy shares on declines (supportive) and sell on rallies (resistance).
BIIB GEX Table
| Expiry Date | Call GEX | Put GEX | Net GEX | P/C GEX |
|---|---|---|---|---|
| Oct 10, 25 | 1,562.05 | -2,704.62 | -1,142.57 | 1.73 |
| Oct 17, 25 | 11,241.08 | -22,278.04 | -11,036.96 | 1.98 |
| Oct 24, 25 | 646.76 | -1,129.73 | -482.97 | 1.75 |
| Oct 31, 25 | 355.31 | -1,196.35 | -841.04 | 3.37 |
| Nov 7, 25 | 80.07 | -61.46 | 18.61 | 0.77 |
| Nov 14, 25 | 6.49 | -6.46 | 0.03 | 1.00 |
| Nov 21, 25 | 2,321.14 | -4,473.64 | -2,152.5 | 1.93 |
| Dec 19, 25 | 5,189.58 | -694.57 | 4,495.01 | 0.13 |
| Jan 16, 26 | 13,546.69 | -13,025.78 | 520.91 | 0.96 |
| Mar 20, 26 | 6,628.71 | -1,115.43 | 5,513.28 | 0.17 |
| Apr 17, 26 | 97.66 | -64.97 | 32.69 | 0.67 |
| Jun 18, 26 | 939.12 | -1,062.68 | -123.56 | 1.13 |
| Sep 18, 26 | 85.01 | -1,110 | -1,024.99 | 13.06 |
| Dec 18, 26 | 990.22 | -1,002.68 | -12.46 | 1.01 |
| Jan 15, 27 | 1,693.48 | -1,960.42 | -266.94 | 1.16 |
| Jan 21, 28 | 21.74 | -51.44 | -29.7 | 2.37 |