Free MRK GEX - Live Merck Gamma Exposure
Review free MRK GEX for Merck 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 drug demand, clinical results, regulation, and product pipelines.
How to use the MRK GEX tool
Search MRK
MRK 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 demoWhat 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
MRK GEX levels in detail
Data as of
Spot
$148.70
Call wall
$155
4.2% above spot
Put wall
$145
2.5% below spot
Gamma flip
$148.04
0.4% below spot
Net GEX
$118K
positive gamma
Largest gamma by strike
- $150 $58K
- $155 $29K
- $148 -$27K
- $165 $20K
- $149 $13K
Since the previous session (Sep 24)
- Spot up 0.3% ($148.23 to $148.70)
- Call wall unchanged at $155
- Put wall unchanged at $145
- Net GEX $56K to $118K
Reviewed by the QuantWheel research team. Modeled from listed MRK options data; not observed dealer inventory and not a forecast. Read how we compute MRK GEX levels.
Build your MRK GEX workspace
Add MRK Heatmap, Max Pain and other GEX views to a custom multi-ticker workspace.
Want to compare strikes across expirations? View the MRK GEX heatmap.
Understanding MRK gamma exposure
Merck is classified in Pharmaceuticals within Health Care. MRK options can respond to company earnings and changes in drug demand, clinical results, regulation, and product pipelines. Use the GEX chart to see whether modeled positive and negative exposure is concentrated at a few strikes or spread across the selected chain.
For MRK, 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 Merck will trade.
New to the concept? Start with our guides to gamma in options and the options Greeks.
MRK GEX methodology and limitations
QuantWheel calculates MRK 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.
MRK GEX FAQ
What is MRK GEX?
MRK GEX estimates gamma exposure across listed MRK options using option gamma and open interest. It helps you compare how modeled exposure is distributed by strike and expiration. MRK GEX does not reveal actual dealer positions or predict where MRK will trade.
How do I read the MRK call wall and put wall?
QuantWheel labels the MRK call wall as the strike with the largest positive modeled GEX and the MRK put wall as the strike with the largest negative modeled GEX in your selected data. Compare both with the MRK price and expiration choices. They are reference levels, not guaranteed support or resistance.
What is the MRK gamma flip?
The MRK gamma flip is the price where modeled net gamma crosses zero for the selected MRK options data. Compare it with the current price and the shape of the strike chart. The MRK gamma flip is a model output, not a trading signal.
Which expirations should I use for MRK GEX?
Start with the nearest MRK expiration to study short-dated positioning, then add later expirations to compare a broader part of the options chain. Each selection changes which MRK contracts are included, so compare one expiration with a combined view before drawing conclusions.
Is the MRK GEX calculator free?
Yes. You can run up to three free MRK 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.