On July 29, Coherent fell 5.68% in regular trading, trading at $228.76/share, with turnover of $243 million. The stock extended its prior session decline of over 12%, as selling pressure across the optical communications sector intensified.

On the news front, Corning released its Q2 earnings and provided Q3 guidance that disappointed the market. Core sales were projected at $4.9 billion to $5.0 billion, with the midpoint of $4.95 billion slightly below analyst consensus. While Corning's Q2 core revenue of $4.74 billion beat expectations with 17% year-over-year growth, the underwhelming forward outlook triggered a nearly 19% single-day plunge in Corning shares, dragging down the broader optical communications sector through linkage effects.

Additionally, the sector has been under sustained pressure since the Philadelphia Semiconductor Index plunged over 4% on July 25. Coherent's earlier attempt at an oversold bounce failed after the stock briefly rallied 3.74% pre-market on July 27 before reversing sharply, reinforcing a bearish-dominated pattern. The company is scheduled to report its fiscal Q4 results on August 12, with expected EPS of $1.43.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)