Citadel Securities’ Rubner Turns Constructive on US Stocks Into Year-End

Rubner's shift matters less as a call than as a positioning signal: with sentiment already negative and AI exposure already trimmed, the marginal seller into month-end looks thinner, which is what makes a late-September weakness scenario tactically different from an ordinary pullback. The sequencing he sketches — tech first, then broadening — implies the rebound thesis rests on AI leadership reasserting itself rather than on a rotation into laggards. Whether that broadening actually materializes, or the recovery stays concentrated in tech, is the open question.