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Both indices carried into the week with force. SPY opened the run Monday at +1.02% to 757.42, then extended +1.36% Tuesday to 771.70 — two sessions that did the bulk of the week's work. QQQ was the stronger leg, printing +1.85% and +1.92% back-to-back into 723.50. The mid-week pause was orderly: SPY gave back -0.83% Wednesday and drifted -0.19% Thursday, while QQQ dipped -1.24% then recovered +0.69%. Friday closed both green — SPY +0.27% to 773.05, QQQ +0.35% to 723.09 — leaving the tape parked just under its highs rather than reversing off them.
The character of the pullback matters more than its size. Wednesday and Thursday's declines were shallow and non-directional, the signature of a market held inside a positive-gamma band where each push away from the center is met with dealer flow leaning the other way.
Both names close in positive gamma, which is the mechanically supportive configuration. When dealers are net long gamma, their hedging is counter-trend: they sell strength and buy weakness to stay delta-flat. That flow compresses realized volatility and tends to pin price toward the strikes where dealer positioning concentrates.
SPY sits at spot 773.16, between a zero-gamma level of 769.63 below and a magnet at 775.00 just overhead. The regime read is NO_SIGNAL — no directional edge from structure, only the pinning behavior around the magnet. The zero-gamma line at 769.63 is the retrospective hinge: above it, dealer flow dampens; a close beneath it would remove that cushion. With Friday's close roughly two points under the magnet, the structure describes a market drawn toward 775 while the 769.63 shelf defines the floor of the stable band.
QQQ closes at 722.67 with a magnet at 725.00 and a far lower zero-gamma level at 705.30. The regime tag here is GF_FLIP — the gamma-flip point is the reference to watch. The wide gap between spot and the 705.30 flip means QQQ carries a deep positive-gamma buffer; the structure holds its dampening character across a broad zone rather than at a knife's edge. As with SPY, price sits just under its magnet, consistent with an upward pin.
Volatility structure aligns with the calm read: VIX1D at 11.46, VIX9D at 11.91, VIX at 14.87, and VIX3M at 18.67 — a steep contango (VIX/3M at 0.80) signaling near-term complacency priced into the front. VVIX at 90.37 and skew at 134.73 round out the surface.
The plumbing is the one place where the week's strength meets resistance. The Fed posture reads DEFENSIVE, tide -4. Net liquidity stands at $5,839.8bn but has drained $116bn over four weeks; reserves fell $106bn over the same window to $2,993.3bn. TGA is essentially flat week-on-week at $907.3bn after a larger four-week build. Foreign officials pulled from the Fed pool, with FIMA down $17bn on the week to $317.7bn. RRP is effectively empty at $1.4bn.
The signal worth flagging is dispersion: COR1M at 7.25 is extreme. Low correlation means index calm is being manufactured by single-name offset — stocks moving independently keeps the index quiet. Should correlation spike, that offset unwinds and index volatility can arrive quickly. Set against that, credit is firm (HY OAS 271bp, tighter 13bp on the week; IG at 78bp) and M2 growth of +5.75% YoY remains a medium-term support. The structure is stable; the tide underneath it is going out.
Educational only — not financial advice. Past performance does not guarantee future results. Paper-trading results are simulated. © helios.markets