SPX dealer positioning, the week of March 16, 2026
Mar 16 to Mar 20 · 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 Mar 16 | 6691.2 | 6699.6 | +8.3 +0.12% | 41.1 | +68.1 | 6700.8 crossed 21x | negative |
| Tuesday Mar 17 | 6735.8 | 6716.9 | -18.9 -0.28% | 40.0 | +17.3 | 6724.8 crossed 13x | negative |
| Wednesday Mar 18 | 6690.7 | 6624.9 | -65.9 -0.98% | 80.6 | -92.0 | 6661.4 crossed 10x | negative |
| Thursday Mar 19 | 6566.6 | 6606.9 | +40.3 +0.61% | 71.1 | -17.9 | 6591.7 crossed 45x | positive |
| Friday Mar 20 | 6584.3 | 6506.4 | -77.9 -1.18% | 113.5 | -100.5 | 6534.8 crossed 18x | negative |
Week: -125.1 points (-1.89%), close to close from 2026-03-13.
Ranges: 346.3 points over 5 sessions, the largest 113.5 on 2026-03-20.
Zero-gamma flip at the close: 6700.8 on the first session, 6534.8 on the last (-166.0 points).
Closed in positive gamma: 1 of 5 sessions.
Events this week
- Mar 17
13:0020-year bond auction, $13B (reopening)
spot +1.4 in the 15 minutes after 13:00; flip 6659.9 → 6661.6; net gamma long - Mar 18
08:30Durable goods orders
Durable goods m/m: actual -1.2% / prior -0.4% - Mar 18
08:30PPI
PPI m/m: actual 0.5% / prior 0.6% - Mar 18
09:30VIX settlement
spot +5.9 in the 15 minutes after 09:30; flip 6560.5 → 6425.4; net gamma long - Mar 18
14:00FOMC decision · high impact
Fed funds: actual 3.75% / prior 3.75%
spot -17.8 in the 15 minutes after 14:00; flip 6717.3 → 6534.6; net gamma long (was short) - Mar 18
14:30FOMC press conference · high impact
spot -13.4 in the 15 minutes after 14:30; flip 6533.3 → 6545.1; net gamma long - Mar 19
08:30Housing starts
Housing starts: actual 1346K / prior 1385K - Mar 20 Expiries coincide: quarterly options, ES and NQ futures, index rebalance
- Mar 20 ES and NQ futures expire at the open (ESH6, NQH6); ESM6 is the front contract
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.