POET Technologies is trading lower amid semiconductor-sector weakness, although no company-specific announcement explaining the move was found. Shares are at $7.37, down 5.15% on September 28, 2026. - A weekend Wall Street Zen downgrade from Hold to Sell is relevant background, but available reporting does not establish it as the cause. - The supplied sector update reports SOXX down 2.62%; the S&P 500, Nasdaq and Dow are also lower amid oil-price and geopolitical concerns.