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Both indices spent the week climbing back above their gamma flip lines and closed the period in positive-gamma territory. SPY opened the week soft — Monday and Tuesday printed marginal declines of -0.04% and -0.07% — then built through midweek with gains of +0.17% and +0.32% on Wednesday and Thursday, reaching 771.08 before easing -0.33% into Friday's 769.28 close. QQQ traced the same arc: two flat-to-down sessions (-0.12%, -0.12%), a +0.24% Wednesday, a +0.44% Thursday to 721.25, then a -0.41% Friday settle at 716.43.
The character of the tape was orderly. Daily ranges stayed narrow, the strongest single session was Thursday's +0.44% in QQQ, and the largest give-back was Friday's -0.41% in the same name. That compression is the signature of dealers working from the long-gamma side of the book — supply into strength, bids into weakness — and it is corroborated by the vol complex. VIX1D closed at 9.93 and VIX9D at 11.19 against a VIX of 14.39 and VIX3M of 17.47. The 1D/9D term ratio at 0.887 and the VIX/3M ratio at 0.824 describe steep contango: near-dated protection is priced cheaply relative to further out.
SPY finished in POSITIVE_GAMMA (a fresh GF_FLIP) with zero gamma at 765.40 and spot at 769.30, roughly four points above the flip and pinned just under the 770.00 magnet. QQQ is in the same regime — GF_FLIP — with zero gamma at 709.44 and spot at 716.96, sitting above the 715.00 magnet.
The mechanics from here are straightforward. With spot above zero gamma, dealer hedging is stabilizing: rallies invite selling and dips invite buying, which is what dampens realized range. The reference lines that matter are the flip levels — 765.40 in SPY, 709.44 in QQQ. Above them, the pinning behavior toward the magnets (770.00 and 715.00) remains the base case for how flows resolve. A close back below the flip line would remove that cushion and hand the regime back to the destabilizing side, where dealer hedging amplifies rather than absorbs moves. As of Friday, both names sat comfortably above that boundary.
One structural tension worth naming: COR1M printed 8.83 — extreme dispersion. Index-level calm is being manufactured by single-name offset, not by uniform quiet. That is a benign condition until correlation snaps higher, at which point the index vol that the term structure is discounting can arrive quickly. SKEW at 144.05 shows tail hedges are richly bid even as front vol stays pinned.
The backdrop is NEUTRAL with the tide draining. NetLiq fell -46.6bn over four weeks to 5,779.72bn, and reserves dropped -59.6bn over the same window to 2,924.94bn. Foreign officials pulled from the Fed pool at roughly -18bn/week, with FIMA down -17.9bn on the week to 355.46bn. RRP is effectively empty at 0.46bn, removing that buffer from the plumbing.
Against the drain sit the supports. M2 is running +5.3% YoY at 23,207.7bn — banks are expanding while the Fed stays flat — a medium-term tailwind. Credit is firm: HY OAS tightened -12bp over five days to 263bp, IG at 79bp. QT pace has slowed to 9.24bn over four weeks. The RRP build flagged (+20bn, td42 of the 15–60 window) is the reason the posture reads bear-leaning rather than neutral-plus.
Net: a stabilizing gamma regime and calm front vol, layered over a draining liquidity tide and extreme dispersion. The flip lines and the dispersion print are the two variables to watch.
Educational only — not financial advice. Past performance does not guarantee future results. Paper-trading results are simulated. © helios.markets