On September 14, Teradyne fell 8.55% in regular trading, trading at 342.28 USD/share, with turnover of approximately $150 million. The stock led the semiconductor equipment sector to the downside amid a broad-based selloff.

On the news front, escalating US-China trade friction combined with tightened semiconductor export controls imposed systemic pressure on the equipment sector. The entire semiconductor equipment industry experienced a sharp decline, with Applied Materials down 6.79%, Lam Research down 6.82%, ASML down 5.88%, KLA Corporation down 4.9%, and AXT Inc down 7.35%. As a leading semiconductor test equipment provider, Teradyne saw an outsized decline relative to sector peers. Despite delivering strong Q2 results — revenue of $1.33 billion representing 104% year-over-year growth and net profit surging 373% — the stock's high-beta characteristics amplified downside pressure under heightened trade policy uncertainty. The company had recently launched three new AI and data center testing instruments on its UltraFLEXplus platform, but fundamental catalysts were overwhelmed by macro headwinds.

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