Case studies
Case 11Called liveFriday, September 11, 2026

CPI morning on the zero gamma line, and the dominant upper strike again

At 10:34 it was one push from negative gamma. It never got the push.

SPX open
7,636.75
High
7,677.02

10:00 ET

Low
7,636.75

09:30 ET

Close
7,656.85
0DTE net gamma positive
96%

of the session's minutes

All-expiry net gamma positive
98%

of the session's minutes

VIX open → close
16.12 → 15.89
VIX high
16.17

Event days

The story

  1. CPI before the open put price on the zero gamma line, 7630 on the owner's premarket read.
  2. 10:34 — net gamma down to +$2.1B and falling. 10:47 pullback low 7650.19 with net gamma still +$1.2B. It never crossed.
  3. By 13:00 the familiar picture: one dominant strike above, 7680 at +$10.4B with -$9.7B one strike up. A sold call spread.
  4. Then what: after the first five minutes the whole day fit between 7650 and 7677. 0DTE net gamma positive 96% of minutes.

Minute by minute

The beats

  1. 10:34 ETposted live

    the post: on the edge of dipping back into negative gamma

  2. 10:47 ET

    the pullback low, 7650.19; 0DTE net gamma +$1.2B, not negative

  3. 11:27 ET

    back to 7675

  4. 11:53 ETposted live

    the post: stick saved; a dominant upper strike, as seen many times

  5. 13:00 ET

    7680 at +$10.4B against -$9.7B at 7685

  6. 15:00 ET

    7665 and 7670 at +$14B and +$12.7B; price 7665

In #qo-market-data, as it happened

Posted live

10:34 ET
Headsup. On the edge of dipping back into negative gamma
11:53 ET
Stick saved and they have built out the similar profile we have seen many times now with a dominant upper strike
15:58 ET
Nothing exciting after the morning. Have a good weekend. Here is an early look at the profiles through OPEX Broadly positive net gamma.

From the product

The dashboard at each beat

Premium Flow, Cumulative Net Delta and Gamma Flow By Strike on one screen, replayed to the minute. Real frames, nothing redrawn. Click the right of the frame to step to the next beat.

Dashboard frame 1 of 6: 10:34 ET — The post: on the edge of dipping back into negative gamma

1 / 6

10:34 ET — The post: on the edge of dipping back into negative gamma

More of this session

The short cut

The short cut

11 slides

The case, slide by slide

Slide 1 of 11

1 / 11

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