ALGO·SUCCESSION
The Daily Read
Thursday 17 September 2026
QQQ at 704.72: the flip sits 14.15% below here (100 points) at 605, out of reach. The level in play is 715, 1.46% above here (10 points). SPX is carrying a live Quantitative Exhaustion alert, the Buy Zone levels, and what each of them has actually done across 477 triggers since 2011, are below.
The tape, across assets
VIX -9.20% | Gold -0.89% | Bitcoin +0.69% | Crude -0.35% | Yen +0.25% | Long treasuries +0.21% | 10-year yield +0.20% |
Start with the tape: VIX down 9.20% and Gold down 0.89%. Only 2 instruments outside equities is carrying a clear risk signal right now, VIX, Gold. That is not enough to call the configuration one way or the other, so this is a note about one instrument rather than a read on the tape. The levels below are doing more work today.
VIX down 9.20% is protection getting cheaper. Falling implied volatility is as much about hedges being lifted as about calm arriving. Quad witching tomorrow matters to that: a large block of open interest expires, and the dealer hedges standing behind it come off with it. The book can behave differently the following week for no reason other than that.
On the calendar
PPI · todayOPEX · tomorrowGDP · Thursday
PPI today is the only scheduled item close enough to matter, and it is not usually a tape-mover on its own.
Set that against the gamma regime and the two agree. QQQ sits above the gamma flip, where dealer hedging leans against the move and compresses the range, the same direction the flattening into today is already pushing. A narrow, unsatisfying tape is the normal outcome of that pairing rather than a sign anything is wrong, and it is the specific condition under which patience costs least.
The levels that matter today
QQQ at 704.72: the flip sits 14.15% below here (100 points) at 605, out of reach. The level in play is 715, 1.46% above here (10 points).
Above the flip by a distance, so dealer hedging is damping the range across everything price is actually trading in. The flip is not today's level. The strike below is.
715 is the king node, the strike carrying the most positive gamma, 1.46% above here (10 points). It is where the tape most often stalls into an expiry, because that is where dealers defend hardest. Not a target.
What kills it: The flip at 605 is 14.2% away and not in play. What is in play is the strike named below.
Quantitative Exhaustion · SPX
Two consecutive Band-0 days trigger the signal. Instead of a single predicted-bottom price it ships a Buy Zone, the range between the Predicted-Bottom High (PBH) and the Predicted-Bottom Low (PBL), anchored off the Day 4-5 pivot high.
Triggered 2026-09-11 13:30:00 · NORMAL VIX regime · Anchored off 7,677.02
7,495.84NOT YET REACHED
PB1 · THE SHALLOW RUNG
The first line price would have to reach for the Buy Zone to have meant anything at all.
From here, price would have to fall another 0.75% (56 points) to reach it.
WHAT THIS LINE HAS ACTUALLY DONE
The shallow target: Fib 0.236 × 10 = 2.36% off the anchor, the same in every VIX regime. Measured on 477 triggers with a resolved window, on SPX, SPY, QQQ and IWM, 2011-2026: price reached the PB1 band (whose shallow edge is the 2.124% variance line pb1_hit actually tests) inside the day 8-19 window 43.2% of the time, against 35.7% on matched signal-free bars: a lift of +7.5 pp, 95% interval +3.5 to +11.2 pp. At the 2.36% line itself it is 38.4% against 31.6%, lift +6.8 pp. The lift is the number; 43% on its own is not, because a shallow pullback is common with or without a trigger.
7,202.58NOT YET REACHED
PB2 · THE DEEP RUNG
The Fib-pure 6.18% line. The deeper of the two, and the only one of the deep pair that separates from chance at all.
From here, price would have to fall another 4.85% (349 points) to reach it.
WHAT THIS LINE HAS ACTUALLY DONE
PB2 is drawn twice: the primary line is the p90 stretch-bottom fitted per VIX regime, the secondary is the Fib-pure 6.18% (0.618 × 10). Measured on 477 triggers in the day 8-40 hunt, only the Fib-pure line separates from its base at all, and barely: 15.5% against 12.2%, lift +3.3 pp, interval +0.8 to +6.3 pp. The 7.86% and 10% per-regime primaries do not separate at any window. Inside the day 8-19 window nothing deep separates. The deep lines are mostly a map of how far a selloff can run, not evidence that it will.
WHERE THIS MODEL FAILED ITS OWN TEST
The alert is dated one session late
A trigger is dated on the LAST zero-succession day of its streak, and whether today is the last one is not known until tomorrow closes: if tomorrow is also quiet the streak extends and the date moves. So a Q.E. alert is a one-session-lagged label, not a same-day signal. Every measured number on this page starts its forward walk at day 6, well past that, so nothing here depends on the difference.
The 16-19 window is not where the low lands
Of the 477 triggers whose day 8-40 hunt completed, the deepest low landed inside days 16-19 11.5% of the time, against 10.6% on matched signal-free bars, a lift of +0.9 pp with an interval of -3.4 to +5.1 pp. Four sessions out of thirty-three is about 12% by chance alone. Treat the band as a calendar marker, not a forecast.
The Deep tier is untested, not conservative
The -16.18% extension was reached on 1 of 477 triggers inside the day 8-19 window in fifteen years (8 of 477 by day 40), no more often than on bars with no trigger at all. It is a drawn extreme, not a measured expectation.
What would change this read
QQQ closes below 605
the hedging regime flips from damping to extending. The same headline gets a larger move after that than it would have got before it.
PPI Release, today
the compression in front of it releases. Which way is not knowable from here; that it releases is the part worth being ready for.
SPX reaches 7,495.84
the shallow Buy Zone rung is tagged, the one rung with a measured lift behind it. The rate, and the three findings that qualify it, are quoted in the exhaustion section.
Structural reference, not advice. Levels describe dealer exposure in the book; a wick through one is not failure, acceptance beyond it is what changes the structure. Where a historical rate appears above it is quoted from our own walk-forward measurement, including the tests that went against us (
all of them here).