Corning's stock experienced a 24-hour plunge of 5.21% during the night session, extending losses from the prior trading day.

The sharp decline was triggered by market reports that Meta Platforms plans to sell its surplus artificial intelligence computing capacity. This news sparked concerns among investors that demand for AI computing infrastructure may have peaked, leading to a broad selloff across the AI hardware supply chain. As a leading supplier in the optical communications sector, Corning faced significant selling pressure as part of this sector-wide downturn.

Additional factors contributing to the decline included profit-taking activity following Corning's previous strong performance and institutional portfolio rebalancing at the half-year mark, which amplified the downward movement.