"Nasdaq ends down as chipmakers fall" amid a global memory-chip selloff — Korea's SK Hynix fell ~7.3% and Samsung ~3.7% even on record earnings. QQQ's heavy semiconductor weighting leaves it exposed, and its sharp +1.2% bounce on 10/19 (to 718.4, still well below the ~757 early-Oct level) looks vulnerable to give-back as risk-off spills over from Asia, so I lean down. Noisy 1d, modest conviction.