SPX dealer positioning, the week of October 13, 2025

Oct 13 to Oct 17 · 5 of 5 days traded · each session free to replay

← the week of Oct 6 the week of Oct 20 →the calendar for this week every session

Day	Open	Close	Change	Range	Close to close	Flip at the close	Gamma at the close
Monday Oct 13	6629.5	6654.7	+25.2 +0.38%	46.7	+101.9	6580.9 not crossed	positive
Tuesday Oct 14	6590.5	6645.2	+54.7 +0.83%	121.2	-9.5	6537.0 not crossed	positive
Wednesday Oct 15	6685.0	6670.8	-14.2 -0.21%	109.4	+25.6	6552.0 not crossed	positive
Thursday Oct 16	6692.6	6629.3	-63.3 -0.95%	112.8	-41.5	6522.6 not crossed	positive
Friday Oct 17	6611.9	6663.4	+51.5 +0.78%	72.4	+34.1	6537.9 not crossed	positive

Week: +110.6 points (+1.69%), close to close from 2025-10-10.
Ranges: 462.5 points over 5 sessions, the largest 121.2 on 2025-10-14.
Zero-gamma flip at the close: 6580.9 on the first session, 6537.9 on the last (-43.0 points).
Closed in positive gamma: 5 of 5 sessions.

Events this week

Oct 14 07:00 JNJ earnings
Oct 14 07:00 JPM earnings
Oct 14 12:20 Fed Chair speech: Economic Outlook and Monetary Policy
spot +3.6 in the 15 minutes after 12:20; flip 6443.4 → 6458.2; net gamma long; walls 6443.4 / 6699.7 → 6458.2 / 6702.2
Oct 15 09:30 VIX settlement
spot +14.2 in the 15 minutes after 09:30; net gamma long (was short)
Oct 15 14:00 Fed Beige Book
spot +2.1 in the 15 minutes after 14:00; flip 6541.3 → 6543.6; net gamma long; walls 6541.3 / 6778.3 → 6543.6 / 6775.2

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.