Free FDS GEX - Live FactSet Gamma Exposure
Free FDS GEX shows where modeled gamma exposure is concentrated in FactSet options. Change expirations to compare the call wall, put wall, gamma flip, and strike profile around trading activity, market volatility, listings, and transaction volumes.
How to use the FDS GEX tool
Search FDS
FDS 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
FDS GEX levels in detail
Data as of
Spot
$331.41
Call wall
$300
9.5% below spot
Put wall
$270
18.5% below spot
Gamma flip
$281.04
15.2% below spot
Net GEX
$735
positive gamma
Largest gamma by strike
- $300 $217
- $370 $156
- $360 $140
- $350 $138
- $270 -$90
Since the previous session (Oct 22)
- Spot down 1.2% ($335.59 to $331.41)
- Call wall $350 to $300
- Put wall unchanged at $270
- Net GEX $621 to $735
Reviewed by the QuantWheel research team. Modeled from listed FDS options data; not observed dealer inventory and not a forecast. Read how we compute FDS GEX levels.
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Want to compare strikes across expirations? View the FDS GEX heatmap.
Understanding FDS gamma exposure
The business exposure behind FDS includes financial exchanges and data. That connects the options chain with trading activity, market volatility, listings, and transaction volumes. Compare the positive and negative GEX bars by strike instead of reading one wall without the rest of the selected profile.
For FDS, compare a single expiration with a combined view before interpreting the call wall, put wall, or gamma flip. Changes in open interest and the contracts selected can shift the modeled profile. These levels describe the selected options data and do not predict where FactSet will trade.
New to the concept? Start with our guides to gamma in options and the options Greeks.
FDS GEX methodology and limitations
QuantWheel calculates FDS 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.
FDS GEX FAQ
What is FDS GEX?
FDS GEX estimates gamma exposure across listed FDS options using option gamma and open interest. It helps you compare how modeled exposure is distributed by strike and expiration. FDS GEX does not reveal actual dealer positions or predict where FDS will trade.
How do I read the FDS call wall and put wall?
QuantWheel labels the FDS call wall as the strike with the largest positive modeled GEX and the FDS put wall as the strike with the largest negative modeled GEX in your selected data. Compare both with the FDS price and expiration choices. They are reference levels, not guaranteed support or resistance.
What is the FDS gamma flip?
The FDS gamma flip is the price where modeled net gamma crosses zero for the selected FDS options data. Compare it with the current price and the shape of the strike chart. The FDS gamma flip is a model output, not a trading signal.
Which expirations should I use for FDS GEX?
Start with the nearest FDS expiration to study short-dated positioning, then add later expirations to compare a broader part of the options chain. Each selection changes which FDS contracts are included, so compare one expiration with a combined view before drawing conclusions.
Is the FDS GEX calculator free?
Yes. You can run up to three free FDS 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.