Applied Optoelectronics is trading 5.7% lower at $93.64 on October 14, 2026, amid continued semiconductor-stock pressure and concerns about Chinese chip competition and AI-investment valuations. No company-specific announcement explaining the intraday move surfaced in available reports. - The completed $600 million at-the-market offering was cited as a possible share-supply overhang, not a confirmed cause. - An insider-sale notice was also cited as a possible overhang; its role in today’s decline is unconfirmed.