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S&P 500 Stock Market Gamma Trading Levels Based on Options Open Interest

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Jan 11 2021

SpotGamma Report for: 01/11/2021 AM

Daily Note:

Futures have retraced the late Friday moved from 3825 to 3790. Interestingly our Call Wall metric rolled higher to 3850, but notional gamma levels are down across all indicies. The likely reason for the Call Wall shifting higher was 30k put volume at 3800 and a small net reduction in calls at 3800. This is not the ideal condition for a Call Wall roll – we’d prefer to see large call volume at 3850 as the driver, as opposed to attrition at 3800.  All told the options structure weakened a bit over the weekend.

The 3800 put position solidifies that strike as the key pivot area going into Friday OPEX with 3850 the new top of range, and 3750 critical support.

Markets starting off today with a bit of pressure is likely due to chunks of SPX + single stock call positions closed on Friday.  We don’t (yet) think this is going to manifest into larger selling, but there are some fascinating this happening under the hood.  That being said, a break of 3750 is likely where gamma flips negative and leads to a larger drawdown.
First, note the OCC weekly position updates below. We publicly shared the “Buy to Open” chart (first graph) but kept the “payload” for subscribers today.OCC options buy to open

Note the very large SELL to open premium. We suspect TSLA is a fair share of this, and that may infer TSLA is something of a “short cover” trade (more on this to come).  There was also a high on a contract basis indicating this options premium selling had a broad reach.

Sell to Open options
Next, note our Equity Gamma charts which show a drawdown in total equity gamma following 1/8 OPEX. This is what infers to us there are some decent sized hedge adjustments taking place this morning.


The selling of options is a fascinating shift in light of the record options volume seen this past week. There is a huge options buying force, that was met with a large options selling force. Buying is still 2x larger, but this is a very interesting development – particularly if put purchases increase in addition to call selling. All this leads into this large 1/15 expiration in which >50% of single stock names have their largest gamma concentration.

Macro Note:

3750-3800 Jan Exp Range.

Signal Name Latest Data Previous SPY NDX QQQ
Ref Price: 3793 3821 379 13033 319
VIX Ref: 14 21.56
SG Gamma Index™: 1.10 1.42 0.18 0.03 -0.01
Gamma Notional(MM): $309.00 $567.00 $649.00 $4.00 $-58.00
SGI Imp. 1 Day Move: 0.61%, 23.0 pts Range: 3770.0 | 3816.0
SGI Imp. 5 Day Move: 3793 2.05% Range: 3715.0 | 3871.0
Zero Gamma Level(ES Px): 3727 3727 — 0
Vol Trigger™(ES Px): 3735 3695 374 12690 311
SG Abs. Gamma Strike: 3700 3800 380 12800 320
Put Wall Support: 3550 3550 360 10500 288
Call Wall Strike: 3850 3800 385 12725 320
CP Gam Tilt: 1.69 1.57 1.26 1.45 0.94
Delta Neutral Px: 3580
Net Delta(MM): $1,100,220.00 $1,098,023.00 $171,904.00 $35,886.00 $65,793.00
25D Risk Reversal -0.08 -0.08 -0.07 -0.08 -0.08
Top Absolute Gamma Strikes:
SPX: [3850, 3800, 3750, 3700]
SPY: [385, 380, 375, 370]
QQQ: [320, 315, 310, 300]
NDX:[13000, 12800, 12725, 12600]
SPX Combo: [3819.0, 3868.0, 3769.0, 3792.0, 3838.0]
NDX Combo: [13071.0, 13280.0, 12654.0]
The Volatility Trigger has moved UP: 3735 from: 3695
The Call Wall has moved to: 3850 from: 3800
SPX resistance is: 3850. Support is: 3700 .Reference ‘Intraday Support’ levels for support areas.
The total gamma has moved DOWN: $309.06MM from: $566.00MM
Positive gamma is moderate which should lead to smaller market moves. Average Range on day is 1.5%

2021-01-11_CBOE_gammagraph_AMSPX.png2021-01-11_CBOE_gammagraph_AMSPY.png2021-01-11_CBOE_gammagraph_AMQQQ.png
2021-01-11_CBOE_gammagraph_AMNDX.png
2021-01-11_CBOE_gammagraph_AMIWM.png
2021-01-11_CBOE_gammagraph_AMRUT.png

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SpotGamma provides this information for research purposes only. It is not investment advice. SpotGamma is not qualified to provide investment advice, nor does it guarantee the accuracy of the information provided.
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SPX Ref: Estimated ES Futures price at which data was run.
VIX Ref: Estimated VIX price at which data was run.
SG Gamma Index: Proprietary gamma modeling index value.
Combo Strike™: A combination of SPY/SPY open interest, then “price normalized” back to the SPX
Gamma Notional: Estimated amount of notional gamma based on traditional gamma modeling.
SG Imp. 1SD Move: For one day ahead it is the projected 1 standard deviation SPX move implied by the SG Gamma Index.
High Gamma Strike: Strike with the highest level of net positive gamma. Seen as a resistance level.
Top Absolute Gamma Strike: Level with most call gamma + put gamma.
Zero Gamma Strike: Estimated level at which gamma flips from positive (above strike) to negative (below strike).
Volatility Trigger™: Similar to Zero Gamma in that its a level at which dealers may shift from positive (above trigger) to negative (below strike).
Click here for a Zero Gamma vs Volatility Trigger Diagram
Put Wall Strike: Strike with largest level of put gamma. Seen as a general support area.
CP Gamma tilt: Call gamma to put gamma ratio. Extreme readings may show skewed investor sentiment.
Delta Neutral Strike: Estimate where the options market may price the delta neutral level. This is NOT model adjusted meaning that we make no assumption on dealer positioning.
25 D Risk Reversal: A measurement of the 25 delta call minus 25 delta put on a ~30 day rolling basis. Used to measure call values relative to puts.

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