On August 4, Coherent rose 3.74% in pre-market trading, trading at $299.58/share, with turnover of $1.8791 million. The stock extends its recovery rally as the optical communication sector continues to release oversold rebound momentum.

On the news front, the optical communication sector had previously suffered heavy losses following the Philadelphia Semiconductor Index plunging over 4% in a single session and Corning's Q3 guidance missing market expectations. After multiple days of selling pressure digestion, the sector began recovering from around July 30. Coherent has rebounded sharply from its July 30 low near $222, with peer stocks showing synchronized gains — Corning rose 3.34% in the same session, reinforcing the sector-wide linkage pattern. The company is scheduled to release its fiscal fourth-quarter earnings on August 12, with consensus EPS expected at $1.43.

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