On August 5, Teradyne fell 3.07% in regular trading, trading at $390.62/share, with turnover of $197 million. The decline came as the broader semiconductor equipment sector faced selling pressure, triggering profit-taking following the stock's significant post-earnings rally.

The semiconductor equipment sector declined broadly, with Lam Research down 3.24%, Applied Materials down 2.05%, ASML down 1.38%, and KLA Corporation down 1.36%. Teradyne had previously surged after reporting Q2 results that far exceeded expectations — revenue of $1.33 billion represented a 104% year-over-year increase, while adjusted EPS of $2.47 significantly beat the consensus estimate of $2.09. The semiconductor test segment contributed $1.122 billion, driven by AI chip testing demand.

Following its earnings release on July 28, the stock accumulated substantial gains, including a nearly 8% single-day rebound on August 4 after a prior session pullback. The current sector-wide weakness is prompting profit-taking amid elevated valuations. Multiple investment banks had raised price targets post-earnings, with JPMorgan, UBS, and Cantor Fitzgerald setting targets of $465, $500, and $550 respectively.

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