SPX dealer positioning, the week of September 29, 2025
Sep 29 to Oct 3 · 5 of 5 days traded · each session free to replay
| Day | Open | Close | Change | Range | Close to close | Flip at the close | Gamma at the close |
|---|---|---|---|---|---|---|---|
| Monday Sep 29 | 6667.7 | 6661.5 | -6.2 -0.09% | 31.2 | +18.1 | 6657.3 crossed 12x | positive |
| Tuesday Sep 30 | 6654.8 | 6688.3 | +33.4 +0.50% | 48.1 | +26.8 | 6656.9 crossed 14x | positive |
| Wednesday Oct 1 | 6657.4 | 6711.7 | +54.2 +0.81% | 61.5 | +23.4 | 6688.4 crossed 4x | positive |
| Thursday Oct 2 | 6723.9 | 6716.0 | -8.0 -0.12% | 35.7 | +4.3 | 6710.6 crossed 10x | positive |
| Friday Oct 3 | 6726.4 | 6716.0 | -10.4 -0.16% | 44.1 | +0.0 | 6728.0 crossed 5x | negative |
Week: +72.6 points (+1.09%), close to close from 2025-09-26.
Ranges: 220.6 points over 5 sessions, the largest 61.5 on 2025-10-01.
Zero-gamma flip at the close: 6657.3 on the first session, 6728.0 on the last (+70.7 points).
Closed in positive gamma: 4 of 5 sessions.
Events this week
- Sep 30
10:00Consumer confidence (Conference Board)
spot -4.2 in the 15 minutes after 10:00; flip 6484.2 → 6505.7; net gamma long - Sep 30
10:00JOLTS job openings
Openings: actual 7.09M / prior 7.20M
spot -4.2 in the 15 minutes after 10:00; flip 6484.2 → 6505.7; net gamma long - Sep 30 Quarter-end SPX expiry (the JPMorgan collar resets)
- Oct 1
09:30VIX settlement
spot +15.7 in the 15 minutes after 09:30; flip 6497.7 → 6555.7; net gamma long - Oct 1
10:00ISM manufacturing PMI
spot +6.3 in the 15 minutes after 10:00; flip 6553.6 → 6560.0; net gamma long - Oct 3
10:00ISM services PMI
spot +1.7 in the 15 minutes after 10:00; flip 6638.2 → 6639.7; net gamma long
Prices are SPX at the minute. Change is close minus open; close to close is against the previous finished session. The zero-gamma flip is the terminal's measured flip at the close, and "crossed" counts the minutes the tape changed sides of it. Gamma at the close is where the close sat against that flip. Events are the market calendar's high and medium impact rows; the line under an in-session event is what the book did in the fifteen minutes after it, from the day's own payload. Nothing here is a forecast; see the Terms.