Monthly OPEX just flipped two patterns that held for weeks. Dark pool net +$1.37B across 9,613 prints — and the money moved back to semis.

$NVDA +$659M. Seven straight sessions of near-silence after the Aug 10 -$1.35B flush (97:1 sell ratio). Then today, three days before Aug 26 earnings, the dark pool re-entered: 1,052 prints, $1.06B buys vs $400M sells. The absence was the signal. The positioning waited. Now it's back.

$MU +$919M. Four sessions flat at equilibrium, then it broke. Both semis bought on the same session for the first time since early August. The capital reallocated ahead of the $NVDA print.

$IWM -$899M. The small-cap rotation reversed. Two weeks of inflows (+$243M Aug 13, +$150M Aug 20) unwound in one OPEX session. The dark pool sold small caps and bought semis. The capital rotated back to where Q3 started.

$SPY +$922M (298 prints). $QQQ +$344M. Both indexes bought. $META -$252M sold. $TSLA +$49M near flat across 988 prints.

The dark pool broke two patterns on OPEX: the $NVDA silence ended, the $IWM rotation reversed. Three trading days to Aug 26. The tape is clear.