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YM1! / MYM1! Futures GEX inferred from DJX & DIA

Dow Jones futures have no listed options book in our data, so this chart infers dealer gamma from DJX index options and DIA ETF options and maps every strike onto YM1! prices. Read it like any other GEX chart: the call wall, put wall and gamma flip are in futures points.

Inferred positioning: these levels come from index and ETF option chains, not from options listed on the futures themselves.

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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

How the inference works

Same math as the equity GEX chart, plus a price mapping

  1. Step 1

    Compute each option book on its own chain

    Dealer gamma is computed strike by strike for DJX & DIA options exactly as on the ordinary GEX calculator, on the dollar-per-1%-move basis so the books are comparable.

  2. Step 2

    Map every strike onto YM1! prices

    Each strike is multiplied by that source's futures/source ratio (the median of the last 30 regular-session minutes where both series printed, refreshed hourly) and snapped to one futures strike grid.

  3. Step 3

    Combine, then re-derive the levels

    The mapped profiles are summed in normalized dollar GEX, never raw gamma. Call wall and put wall are re-read from the combined profile; the gamma flip is the exposure-weighted mean of the sources' flips. A source toggle shows either book alone.

Covered contracts

Six families, each with its micro
ContractMicroMarketInferred from
ES1!MES1!S&P 500SPX & SPY options
NQ1!MNQ1!Nasdaq-100NDX & QQQ options
RTY1!M2K1!Russell 2000RUT & IWM options
YM1!MYM1!Dow JonesDJX & DIA options
GC1!MGC1!GoldGLD options(ETF-derived)
SI1!SIL1!SilverSLV options(ETF-derived)

Questions

About inferred futures GEX

FAQ

From the DJX cash-index option chain and the DIA ETF option chain. Both books hedge the same Dow Jones exposure, so their dealer gamma is combined into one profile. You can also view either source on its own.

Each source strike is multiplied by the futures/source price ratio - the median of the last 30 regular-session minutes where both series printed - and snapped to a YM1! strike grid. The ratio absorbs the basis (carry, dividends) between the index or ETF and the front-month contract, and is refreshed hourly.

In dollar gamma per 1% move, not raw gamma. A 1% move is the same event for DJX, DIA and YM1!, so dollar GEX per 1% is directly additive across the two books. Only after summing is the profile scaled back to the formula you selected.

No. It is an inference from the equity-market option books that share the same underlying exposure. Options listed on the futures themselves (and OTC flow) are not included, which is why every surface labels the profile "Inferred from DJX & DIA options".

Yes. MYM1! trades at the same price as YM1! with a smaller multiplier, so the same levels apply. Searching MYM1! in the calculator, or selecting it in TradingView with the QuantWheel bridge, returns this profile labelled for the micro contract.