KIOXIA is trading 15.78% down at ¥11,345 after a forecast of nearly flat October–December operating profit, below analyst expectations. - The cautious outlook overshadowed record July–September results. - Reports also cite slower NAND price increases and shipment timing as concerns behind the outlook. - The broader memory-chip rebound does not explain the reported sharp decline. Reports attribute the move to guidance and do not establish a fresh November 4 announcement or trading-session move.