Free BIIB GEX - Live Biogen Gamma Exposure
Free BIIB GEX shows where modeled gamma exposure is concentrated in Biogen options. Change expirations to compare the call wall, put wall, gamma flip, and strike profile around clinical results, regulatory decisions, product demand, and research spending.
How to use the BIIB GEX tool
Search BIIB
BIIB is already entered. Keep it or enter another ticker, then select Search.
Select expirations
Choose one or more expiration dates to include.
Generate GEX
Select Generate GEX to view the chart and key levels.
Run up to 3 free GEX calculations per day.
What is Gamma Exposure (GEX)?
Gamma Exposure represents the sensitivity of an option's delta to changes in the underlying price. Market makers hedge their gamma exposure, creating support/resistance at high GEX strikes.
Key Levels:
- Call Wall: Strike with highest positive GEX (resistance)
- Put Wall: Strike with the largest put GEX, shown as the deepest negative bar (support)
- Gamma Flip: Where total GEX changes from negative to positive
Positive GEX: Market makers sell into rallies, buy into dips (stabilizing).
Negative GEX: Market makers buy into rallies, sell into dips (amplifying moves).
Select a ticker and expiration date, then click Generate GEX to see the analysis
Key levels
BIIB GEX levels in detail
Data as of
Spot
$253.69
Call wall
$235
7.4% below spot
Put wall
$250
1.5% below spot
Gamma flip
$280.35
10.5% above spot
Net GEX
-$5K
negative gamma
Largest gamma by strike
- $250 -$4K
- $252.50 $1K
- $235 -$1K
- $240 -$804
- $247.50 -$506
Since the previous session (Oct 29)
- Spot up 0.4% ($252.71 to $253.69)
- Call wall $255 to $235
- Put wall $247.50 to $250
- Net GEX -$8K to -$5K
Reviewed by the QuantWheel research team. Modeled from listed BIIB options data; not observed dealer inventory and not a forecast. Read how we compute BIIB GEX levels.
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Want to compare strikes across expirations? View the BIIB GEX heatmap.
Understanding BIIB gamma exposure
For Biogen, the relevant business context includes clinical results, regulatory decisions, product demand, and research spending. The company is part of the Biotechnology group. Use BIIB GEX to compare strike concentrations and check whether the modeled profile changes when you add or remove expirations.
New to the concept? Start with our guides to gamma in options and the options Greeks.
BIIB GEX methodology and limitations
QuantWheel calculates BIIB GEX from the selected expirations, available options data and the formula displayed in the calculator. The result summarizes modeled gamma exposure by strike.
GEX is a model output, not observed dealer inventory or a price forecast. Open interest does not identify who owns an option, and the displayed call wall, put wall and gamma flip can change when the inputs or selected expirations change.
BIIB GEX FAQ
What is BIIB GEX?
BIIB GEX estimates gamma exposure across listed BIIB options using option gamma and open interest. It helps you compare how modeled exposure is distributed by strike and expiration. BIIB GEX does not reveal actual dealer positions or predict where BIIB will trade.
How do I read the BIIB call wall and put wall?
QuantWheel labels the BIIB call wall as the strike with the largest positive modeled GEX and the BIIB put wall as the strike with the largest negative modeled GEX in your selected data. Compare both with the BIIB price and expiration choices. They are reference levels, not guaranteed support or resistance.
What is the BIIB gamma flip?
The BIIB gamma flip is the price where modeled net gamma crosses zero for the selected BIIB options data. Compare it with the current price and the shape of the strike chart. The BIIB gamma flip is a model output, not a trading signal.
Which expirations should I use for BIIB GEX?
Start with the nearest BIIB expiration to study short-dated positioning, then add later expirations to compare a broader part of the options chain. Each selection changes which BIIB contracts are included, so compare one expiration with a combined view before drawing conclusions.
Is the BIIB GEX calculator free?
Yes. You can run up to three free BIIB GEX calculations per day on the public tool. After using those calculations, continue for free in the GEX demo. Check the current QuantWheel pricing page for plan access details.