Biogen Inc. (BIIB)
NASDAQ: BIIB
· Real-Time Price · USD
139.31
0.19 (0.14%)
At close: Aug 22, 2025, 3:59 PM
139.53
0.16%
After-hours: Aug 22, 2025, 07:55 PM EDT
BIIB Gamma Exposure By Expiry
The total Gamma Exposure (GEX) for BIIB across all expirations is 26,974.02 shares per 1% move, with 58,086.68 from calls and 31,112.66 from puts. The put-call GEX ratio of 0.54 reflects balanced positioning between puts and calls. The highest gamma concentration is at the Sep 19, 25 expiration with 11,016.72 net GEX, which may act as a magnet point for price action. Near-term exposure for Aug 29, 25 suggests potential support from positive gamma hedging flows.
BIIB GEX Table
| Expiry Date | Call GEX | Put GEX | Net GEX | P/C GEX |
|---|---|---|---|---|
| Aug 29, 25 | 4,641.54 | -3,243.63 | 1,397.91 | 0.70 |
| Sep 5, 25 | 1,105.28 | -2,195.18 | -1,089.9 | 1.99 |
| Sep 12, 25 | 569.35 | -877.27 | -307.92 | 1.54 |
| Sep 19, 25 | 20,027.87 | -9,011.15 | 11,016.72 | 0.45 |
| Sep 26, 25 | 214.05 | -158.68 | 55.37 | 0.74 |
| Oct 3, 25 | 3.83 | 0 | 3.83 | 0.00 |
| Oct 17, 25 | 11,173.62 | -2,289.85 | 8,883.77 | 0.20 |
| Jan 16, 26 | 14,275.72 | -9,527.19 | 4,748.53 | 0.67 |
| Mar 20, 26 | 2,351.44 | -659.64 | 1,691.8 | 0.28 |
| Apr 17, 26 | 28.28 | -13.23 | 15.05 | 0.47 |
| Jun 18, 26 | 852.59 | -380.26 | 472.33 | 0.45 |
| Sep 18, 26 | 49.51 | -178.1 | -128.59 | 3.60 |
| Dec 18, 26 | 1,030.09 | -882.57 | 147.52 | 0.86 |
| Jan 15, 27 | 1,763.51 | -1,695.91 | 67.6 | 0.96 |