Data through close

BIIB max pain, gamma exposure (GEX) & options open interest

As of close · rank #1157 by open interest · snapshot page

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BIIB's nearest-expiration max pain is 215.00 for 2026-10-09, its GEX flip is 185.35, net GEX is 1,847,765, its put/call open-interest ratio is 0.81. These are whole-chain derived aggregates as of Oct 2, 2026 close.

Close
219.88
prev 222.82
Gamma max
232.52
+5.8% from close
Delta neutral
193.14
-12.2% from close
Gamma neutral
185.35
-15.7% from close
Open interest
37,707
-4.5% vs prev
Contracts listed
463
304 calls · 253 puts

Whole-chain analytics

Derived after the close from the same dated options chain. Signed gamma exposure uses calls positive and puts negative; it is a model convention, not observed dealer inventory.

Nearest max pain
215.00
-2.2% from close
2026-10-09
GEX flip
185.35
-15.7% from close
Net GEX
1,847,765
4,900,323 per 100k OI
Call wall
230.00
+4.6% from close
Put wall
200.00
-9.0% from close
Put/call OI
0.81
16,895 puts / 20,812 calls

Advanced options analysis

Complete derived analysis from the dated chain, normalized where possible for comparison across tickers. Catalyst intensity measures unusual pricing and activity; it does not identify an event, predict direction, or establish that an investment is attractive.

Catalyst intensity
–
cross-sectional score / 100
Directional score
–
IV rank
54.3
within trailing 52-week range
Front / back ATM IV
+33.4% / +37.3%
-3.9 pp front premium
Expected move
+4.6%
7 DTE · one standard deviation
ATM straddle / spot
+4.6%
front-window midpoint premium
25Δ risk reversal
1.1 pp
put IV minus call IV
IV butterfly
4.8 pp
front-window smile convexity
Volume / open interest
0.05
1,872 contracts traded
Normalized net delta
0.240
option-holder convention
Modeled dealer delta
-0.240
opposite-side scenario
Vanna / 100k OI
972
volatility-sensitive delta
Charm / 100k OI
-1,117,823
time-decay-sensitive delta
IV surface range
68.8 pp
published contour maximum minus minimum

Download the complete dated analysis JSON .

BIIB closed 5.8% below its gamma max of 232.52. It is 12.2% above the delta neutral price of 193.14. Total open interest is 37,707, -4.5% versus the previous session. What gamma max means · What delta neutral means

History

Full history since 2020: drag to pan, scroll to zoom, hover for values. Open full-screen chart

Analysis visualizations

Derived from the 2026-10-02 options chain. Select an analysis to explore its chart.

Gamma walls

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In today's screens

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Neighbours by open interest

← MLCO (#1156) MAR (#1158) →

Questions people ask about BIIB

Where is BIIB's gamma max today?

As of Oct 2, 2026, the gamma max for BIIB is 232.52, +5.8% from the 219.88 close. Gamma max is the underlying price at which the summed gamma of every open contract is largest; how it is computed and why it matters.

Is BIIB above or below its delta neutral price?

BIIB closed above delta neutral: 219.88 against a delta neutral price of 193.14. The delta neutral price is where the summed delta of the whole chain is zero; the definition.

How much open interest does BIIB have?

37,707 contracts of open interest across 463 listed contracts on Oct 2, 2026, -4.5% versus the previous session. What open interest measures.

Levels are recomputed after every trading day from licensed end-of-day options data; only derived aggregates are published. Methodology · Data and licence · Not investment advice.