On August 11, Corning fell 3.12% in regular trading, trading at approximately $160.55/share, with turnover of $671 million. The decline came amid a broad pullback across the optical communications sector, with industry peer Coherent dropping 11.81%, placing significant pressure on the entire segment.

The sector had been rallying continuously since late July following Corning's approximately 45% correction in July. The rebound was driven by Truist Securities upgrading Corning's rating from \"Hold\" to \"Buy\" with a target price of $175, as well as broader sector momentum. Truist analysts noted that the sharp July pullback had brought valuations back to reasonable levels, projecting earnings per share growth at a 30% compound annual rate through 2029. After multiple consecutive sessions of strength across optical communications names, the sector experienced a collective adjustment, with Corning following the broader group lower.

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