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Biogen Inc BIIB 254.46 5.53 2.22%

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ATM IV
0.494
Put Call Ratio (OI)
0.995
Put Call Ratio (Vol)
1.1
IV Rank
76.5
IV Percentile
98.4
Max pain
250

Gamma exposure (2026-11-04)

GEX estimates dealer hedging flow at each strike.

Positive GEX = dealers are long gamma; they buy the dip and sell the rip, dampening volatility. Negative GEX = dealers are short gamma; they sell the dip and buy the rip, amplifying volatility.

DTE \text{DTE}
2.0
807.0
| Δ | |\Delta|
0.00
1.00
Moneyness Moneyness
-194.5
194.5
View values by strike
BIIB · Gamma exposure · 2026-11-04. USD of exposure per 1% underlying move.
StrikeCallsPuts
60.00 9.66 -124
65.00 8.05 -7.06
70.00 27.9 -167
75.00 106 -4.8 K
80.00 405 -1.86 K
85.00 129 -1.2 K
90.00 394 -1.13 K
95.00 108 -3.19 K
100.00 637 -15.5 K
105.00 381 -13.3 K
110.00 821 -20.9 K
115.00 194 -11.1 K
120.00 1.58 K -18.5 K
125.00 597 -12.5 K
130.00 3.51 K -6.32 K
135.00 1.59 K -4.46 K
140.00 4.35 K -9.01 K
145.00 1.53 K -10.5 K
150.00 175 K -33.7 K
155.00 4.6 K -11.1 K
160.00 11.3 K -26.1 K
165.00 3.96 K -30.6 K
170.00 15.5 K -51 K
175.00 19.6 K -39.2 K
180.00 60.4 K -162 K
185.00 51.7 K -23.2 K
190.00 23.6 K -101 K
195.00 93 K -225 K
200.00 207 K -352 K
205.00 31.1 K -14.3 K
210.00 335 K -247 K
212.50 0 -3.13 K
215.00 58.2 K -10.5 K
217.50 0 -1.17 K
220.00 392 K -484 K
222.50 394 0
225.00 31 K -195 K
227.50 387 -7.85 K
230.00 834 K -1.05 M
232.50 561 -6.38 K
235.00 171 K -1.05 M
237.50 29.4 K -10.9 K
240.00 1.57 M -1.57 M
242.50 7.98 K -22 K
245.00 691 K -261 K
247.50 30.1 K -60.3 K
250.00 1.08 M -3.83 M
252.50 77.9 K -79.6 K
255.00 1.63 M -325 K
257.50 200 K -23.3 K
260.00 1.23 M -387 K
262.50 14.9 K -7.85 K
265.00 766 K -4.98 K
267.50 10.1 K 0
270.00 182 K -15.8 K
272.50 935 0
275.00 202 K -2.41 K
280.00 600 K -5.68 K
282.50 459 0
285.00 140 K 0
290.00 291 K -1.48 K
295.00 30.6 K 0
300.00 482 K -3.02 K
305.00 9.42 K 0
310.00 39.6 K 0
315.00 15.6 K 0
320.00 123 K 0
330.00 10.8 K 0
340.00 63.6 K 0
350.00 8.26 K 0
360.00 2.26 K 0