On July 28, Coherent fell 6.71% in regular trading, trading at approximately $249.81/share, with turnover of around $100 million. The decline reflects intensifying selling pressure across the optical communication sector following the Philadelphia Semiconductor Index's sharp 4%+ single-day plunge on July 25.

The downturn deepened after Coherent's attempted oversold rebound on July 27 failed decisively. The stock had rallied as much as 3.74% in pre-market to near $293, but reversed sharply after the open and closed down over 3%, signaling continued bearish dominance. Peer stock Corning plunged 14.7% intraday on the same session, exacerbating sector-wide pressure.

Looking ahead, Coherent is scheduled to report its fiscal fourth-quarter earnings on August 12, with consensus EPS expected at $1.43. The approaching earnings window is intensifying the tug-of-war between bulls and bears, with sellers maintaining control of price action in the near term.

(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.)