Ciena is trading 12.9% lower at $235.98 amid pressure on AI- and data-center-linked stocks. - Reuters reported November 5 that investors feared a Democratic midterm sweep could bring tougher scrutiny and slow data-center expansion. - Technology stocks and major indexes were also sharply lower; no company-specific announcement explaining Ciena’s move was identified. - Ciena fell 9.28% on November 4, before another steep decline.