The Daily Read

Changelog

Every correction to a published edition, and every edition the pre-publish checks held back.

Corrections

2026-10-15 · corrected 2026-10-28 Corrected 28 Oct 2026. This edition first printed SPX at 7,697.94 and a gamma flip at 6,700, "12.96% below". Both were wrong. SPX closed at 7,718.94 on 14 Oct (the session this read was written from), and the 6,700 flip came from a bad option-chain read; the true flip for the session was not recorded, so no flip is stated. The regime line that depended on it is withdrawn. The 7,750 level and the rest of the edition are unchanged.

Level and method changes

2026-11-01Backtest re-run with the 28 Oct look-ahead fix (entries now at the next open, because the signal is only known at the close). Stop 1%, target 2%, 5-day hold, trades / hit rate before -> after: reversal SPX 70/37.1% -> 70/40.0%, SPY 76/42.1% -> 74/41.9%, QQQ 100/49.0% -> 94/39.4%, IWM 99/35.4% -> 92/34.8%; exhaustion SPX 104/50.0% -> 96/63.5%, SPY 98/44.9% -> 93/53.8%, QQQ 35/45.7% -> 33/60.6%, IWM 8/50% -> 8/75%. The reversal results got weaker (QQQ by almost ten points); every reversal hit rate is at or below 42%. Exhaustion hit rates rose, but these are raw hit rates on one parameter set with no matched base rate, and IWM has 8 trades. The /backtest page computes these live, so it already shows the corrected figures. The volatility-regime (HMM) history chart is labelled in-sample: each past day is decoded with the whole 252-day window, including later days.
2026-10-30SPX Buy Zone trigger moved from 7,565.56 to 7,575.33 (SPY 754.06 to 755.11). Not an error in the arithmetic: a new Q.E. alert fired on 29 Oct and the zone is always measured from the most recent alert. The old zone was 2.36% below the 13 Oct alert's day 4-5 pivot high (7,748.42). The new alert's day 4-5 pivot has not printed yet, so the zone is anchored provisionally on its swing high (7,758.43, 28 Oct) and will move again when the pivot prints (4-5 Nov). The stored alert now records which anchor was used, and /brief prints each trigger's base level, rule and previous value.

Held editions

2026-10-30 Held by the pre-publish checks: outlier level: SPY flip 645 is 14.23% from spot 751.98 (limit 10%). We do not publish an edition with a known error.