ALGO·SUCCESSION
The Daily Read
Tuesday 13 October 2026
SPX at 7,807.24 is 0.03% above the gamma flip at 7,805, 2 points. It is also 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
Crude -1.91% | Bitcoin +1.91% | VIX +1.12% | Gold +0.44% | Long treasuries +0.09% | 10-year yield -0.08% | Yen +0.00% |
Start with the tape: Crude down 1.91%, Bitcoin up 1.91% and VIX up 1.12%. Only 2 instruments outside equities is carrying a clear risk signal right now, VIX, Bitcoin. 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.
Crude down 1.91%. Energy is the one input that prices in two directions at once (as a growth signal and as a cost) which is why a move this size turns up in places that have nothing to do with oil. It reaches the inflation data through the goods basket with a lag measured in months, so it does not move the CPI print tomorrow. It moves the one after. What it changes today is the EXPECTATION, and expectations are what the bond market trades.
VIX up 1.12% is the market paying more for protection. That is a price for insurance, not a forecast, it rises on demand for hedges at least as often as on anything actually realised, and the two are easy to confuse when the screen is red. Quad witching Friday 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
CPI · tomorrowPPI · ThursdayOPEX · Friday
CPI lands tomorrow. Sessions in front of an event like that tend to go quiet and directionless as positioning flattens, a narrow, choppy tape before one of these is the normal thing, not a signal. The levels below still hold; they just get tested with less conviction until it clears.
The instruments are not in the same regime, which is worth knowing before reading any one of them. SPY sits below the flip, where hedging runs with the move and extends the range; SPX sits above it, where hedging leans against the move and compresses it. A split book is a weaker read than either side alone, and the practical consequence is that the flip levels below matter more today than the direction does, whichever way the tape resolves into tomorrow, it is the crossing that changes the character of the move, not the move itself.
The levels that matter today
SPX at 7,807.24 is 0.03% above the gamma flip at 7,805, 2 points.
Above the flip, dealer hedging leans AGAINST the move, they sell strength and buy weakness, which compresses the range. Rallies grind rather than run.
7,825 is the king node, the strike carrying the most positive gamma, 0.23% above here (18 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: That read dies on an accepted break below 7,805. Not a wick through it, a close beneath it.
SPY at 778.10 is 0.37% below the gamma flip at 781, 3 points.
Below the flip, hedging leans WITH the move, dealers sell into weakness and buy into strength, which extends the range. Moves travel further than they look like they should.
777 is the king node, the strike carrying the most positive gamma, 0.14% below here (1 point). It is where the tape most often stalls into an expiry, because that is where dealers defend hardest. Not a target.
What kills it: That read dies on an accepted reclaim of 781.
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 2026-10-12 13:30:00 · NORMAL VIX regime · Anchored off 7,821.67
7,637.08NOT 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 2.23% (170 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.
7,338.29NOT 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 6.39% (469 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.
Past this week · SPY
This week 38%The monthly cycle 5%Next cycle 57%
The next cycle book centres at 764, 1.8% below spot of 778.10.
Dealers are net SHORT gamma out there, so if price reaches that area the hedging runs with the move rather than against it.
Read that as structure, not as a pin. Gamma per contract decays with time to expiry, so a far-dated strike carrying the same open interest as a weekly exerts a fraction of the hedging pressure, the dealer's delta barely moves as spot passes through it. It is a level that matters slowly, and it says nothing about direction on its own.
What would change this read
SPX closes below 7,805
the hedging regime flips from damping to extending. The same headline gets a larger move after that than it would have got before it.
SPY reclaims 781 on a close
the hedging regime flips from extending to damping, and rallies start to grind rather than run.
CPI Release, tomorrow
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 7,637.08
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).