Free VST GEX - Live Vistra Gamma Exposure
Review free VST GEX for Vistra by selecting the expirations you want to study. The chart compares modeled net GEX, call wall, put wall, gamma flip, and strike concentrations related to power demand, regulation, fuel costs, and financing conditions.
How to use the VST GEX tool
Search VST
VST 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
VST GEX levels in detail
Data as of
Spot
$159.62
Call wall
$160
0.2% above spot
Put wall
$160
0.2% above spot
Gamma flip
$141.71
11.2% below spot
Net GEX
$114K
positive gamma
Largest gamma by strike
- $160 $33K
- $155 $21K
- $150 $16K
- $165 $10K
- $170 $9K
Since the previous session (Oct 5)
- Spot up 9.5% ($145.74 to $159.62)
- Call wall $145 to $160
- Put wall $135 to $160
- Net GEX $73K to $114K
Reviewed by the QuantWheel research team. Modeled from listed VST options data; not observed dealer inventory and not a forecast. Read how we compute VST GEX levels.
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Understanding VST gamma exposure
For Vistra, the relevant business context includes power demand, regulation, fuel costs, and financing conditions. The company is part of the Electric Utilities group. Use VST 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.
VST GEX methodology and limitations
QuantWheel calculates VST 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.
VST GEX FAQ
What is VST GEX?
VST GEX estimates gamma exposure across listed VST options using option gamma and open interest. It helps you compare how modeled exposure is distributed by strike and expiration. VST GEX does not reveal actual dealer positions or predict where VST will trade.
How do I read the VST call wall and put wall?
QuantWheel labels the VST call wall as the strike with the largest positive modeled GEX and the VST put wall as the strike with the largest negative modeled GEX in your selected data. Compare both with the VST price and expiration choices. They are reference levels, not guaranteed support or resistance.
What is the VST gamma flip?
The VST gamma flip is the price where modeled net gamma crosses zero for the selected VST options data. Compare it with the current price and the shape of the strike chart. The VST gamma flip is a model output, not a trading signal.
Which expirations should I use for VST GEX?
Start with the nearest VST expiration to study short-dated positioning, then add later expirations to compare a broader part of the options chain. Each selection changes which VST contracts are included, so compare one expiration with a combined view before drawing conclusions.
Is the VST GEX calculator free?
Yes. You can run up to three free VST 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.