On August 18, Coherent declined 3.2% overnight, trading at 339.0 USD/share, with turnover of 843.09万美元. The pullback came after the stock surged over 7% during regular trading hours, triggering profit-taking as short-term cumulative gains reached elevated levels.

The decline occurred despite positive catalysts earlier in the session, including the company announcing it had begun customer sampling of 300mm high thermal conductivity silicon carbide substrates designed for AI chip heat management, offering up to 25% cooling performance improvement over existing materials. Additionally, the stock had been buoyed by strong Q4 fiscal results — revenue of $2.046 billion (up 34% YoY) and adjusted EPS of $1.74 (up 74% YoY) — along with multiple Wall Street target price upgrades from JPMorgan ($435), Needham ($420), Jefferies ($420), and Morgan Stanley ($375).

Within the Electronic Components sector, broad weakness amplified selling pressure. Corning fell 2.72%, Amphenol declined 0.46%, and Vishay Intertechnology dropped 0.51%, reflecting sector-wide softness that compounded the short-term profit-taking dynamic.

(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.)