POET Technologies is trading 8.1% lower at $4.49 on November 5, 2026, amid semiconductor weakness tied to concerns that tighter data-center regulation could slow AI infrastructure construction and chip demand. - Reports describe chip weakness continuing despite Wednesday’s broad-market rally, with regulation concerns weighing on semiconductor sentiment. - No specific POET Technologies announcement explaining the decline was found. - The company’s news page lists third-quarter results for November 16, not a November 5 earnings release.