Free GM GEX - General Motors Gamma Exposure
Free GM GEX maps General Motors gamma exposure by strike. Choose expirations around earnings, vehicle demand updates or other company events, then generate the chart to compare net GEX, call wall, put wall and gamma flip.
How to use the GM GEX tool
Search GM
GM 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. Need more?
Continue for free in the GEX SandboxGEX Workspace
Multi-ticker dashboard with alerts
GEX Heatmap
Strike-level gamma by expiration
GEX Intraday PlayTape
Intraday gamma movement & replay
Max Pain Calculator
Options pain strike by expiration
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
Build your GM GEX workspace
Add GM Heatmap, Max Pain and other GEX views to a custom multi-ticker workspace.
Open GEX WorkspaceWant to compare strikes across expirations? View the GM GEX heatmap.
Understanding GM gamma exposure
GM gamma builds around quarterly earnings, where truck and SUV pricing drives the numbers, and around periodic autonomous-vehicle and EV program news. The call wall has repeatedly capped rallies during periods when the market rewarded the buyback story, and the put wall firms up on any sign of pricing weakness in the pickup segment. Read the gamma flip level as a cyclical indicator - GM losing flip has generally coincided with the market repricing US auto demand rather than anything company-specific.
New to the concept? Start with our guides to gamma in options and the options Greeks.
GM GEX methodology and limitations
QuantWheel calculates GM 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.
GM GEX FAQ
What is GM GEX?
GM GEX estimates gamma exposure across listed GM options using option gamma and open interest. It helps you compare how modeled exposure is distributed by strike and expiration. GM GEX does not reveal actual dealer positions or predict where GM will trade.
How do I read the GM call wall and put wall?
QuantWheel labels the GM call wall as the strike with the largest positive modeled GEX and the GM put wall as the strike with the largest negative modeled GEX in your selected data. Compare both with the GM price and expiration choices. They are reference levels, not guaranteed support or resistance.
What is the GM gamma flip?
The GM gamma flip is the price where modeled net gamma crosses zero for the selected GM options data. Compare it with the current price and the shape of the strike chart. The GM gamma flip is a model output, not a trading signal.
Which expirations should I use for GM GEX?
Start with the nearest GM expiration to study short-dated positioning, then add later expirations to compare a broader part of the options chain. Each selection changes which GM contracts are included, so compare one expiration with a combined view before drawing conclusions.
Is the GM GEX calculator free?
Yes. You can run up to three free GM GEX calculations per day on the public tool. After using those calculations, continue for free in the GEX Sandbox. Check the current QuantWheel pricing page for plan access details.