Free MOS GEX - Live Mosaic Gamma Exposure
Free MOS GEX helps you examine modeled Mosaic gamma exposure by strike. Select one or more expirations to compare net GEX, the call wall, the put wall, and the gamma flip around industrial demand, capacity, raw-material costs, and pricing.
How to use the MOS GEX tool
Search MOS
MOS 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
MOS GEX levels in detail
Data as of
Spot
$21.33
Call wall
$22
3.2% above spot
Put wall
$21.50
0.8% above spot
Gamma flip
$22.06
3.4% above spot
Net GEX
-$12K
negative gamma
Largest gamma by strike
- $25 $45K
- $22 -$40K
- $21.50 -$26K
- $26 $21K
- $21 -$19K
Since the previous session (Oct 5)
- Spot down 0.3% ($21.39 to $21.33)
- Call wall unchanged at $22
- Put wall unchanged at $21.50
- Net GEX -$20K to -$12K
Reviewed by the QuantWheel research team. Modeled from listed MOS options data; not observed dealer inventory and not a forecast. Read how we compute MOS GEX levels.
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Understanding MOS gamma exposure
MOS provides options exposure to Mosaic, which operates in fertilizers and agricultural chemicals. Earnings and shifts in industrial demand, capacity, raw-material costs, and pricing can change option pricing and open interest. The GEX chart shows how modeled exposure is distributed for the contracts and expirations you include.
New to the concept? Start with our guides to gamma in options and the options Greeks.
MOS GEX methodology and limitations
QuantWheel calculates MOS 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.
MOS GEX FAQ
What is MOS GEX?
MOS GEX estimates gamma exposure across listed MOS options using option gamma and open interest. It helps you compare how modeled exposure is distributed by strike and expiration. MOS GEX does not reveal actual dealer positions or predict where MOS will trade.
How do I read the MOS call wall and put wall?
QuantWheel labels the MOS call wall as the strike with the largest positive modeled GEX and the MOS put wall as the strike with the largest negative modeled GEX in your selected data. Compare both with the MOS price and expiration choices. They are reference levels, not guaranteed support or resistance.
What is the MOS gamma flip?
The MOS gamma flip is the price where modeled net gamma crosses zero for the selected MOS options data. Compare it with the current price and the shape of the strike chart. The MOS gamma flip is a model output, not a trading signal.
Which expirations should I use for MOS GEX?
Start with the nearest MOS expiration to study short-dated positioning, then add later expirations to compare a broader part of the options chain. Each selection changes which MOS contracts are included, so compare one expiration with a combined view before drawing conclusions.
Is the MOS GEX calculator free?
Yes. You can run up to three free MOS 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.