Teradyne stock falls 5.59 percent ahead of October earnings

Teradyne stock (ISIN US8807701029) was trading at USD 406.28 on Nasdaq on October 7, 2026 at 10:56 a.m. ET, down 5.59 percent from the prior close. The move leaves the semiconductor test company 16.7 percent below its 52-week high of USD 487.91 and gives investors a clear test of whether AI-driven growth can offset valuation pressure.

Quarterly growth resets expectations

MarketBeat reports that Teradyne generated USD 1.33 billion in second-quarter 2026 revenue, up 103.9 percent from the same quarter of 2025. Earnings per share reached USD 2.47, exceeding the USD 2.09 consensus estimate by USD 0.38.

The comparison matters because the revenue increase is paired with a sharp earnings improvement: Teradyne posted EPS of USD 0.57 in the year-ago quarter, according to MarketBeat. That operating leverage is the fundamental support behind the stock's AI narrative, even as the session price points to a demanding market test.

AI demand meets valuation risk

Zacks reported on October 6, 2026 that Teradyne's memory revenue reached a record USD 212 million in the second quarter, with memory book-to-bill above 2. The company expects third-quarter revenue of USD 1.20 billion to USD 1.30 billion, compared with a Zacks consensus estimate of USD 1.27 billion.

Zacks also assigns Teradyne a Rank 3, or Hold, and identifies competition, customer concentration and margin pressure as risks. The stock's 129.6 percent year-to-date gain cited by Zacks has raised the importance of execution in the October report, because the growth case now depends on converting AI and memory demand into durable earnings.

Consensus target trails current price

MarketBeat reports a Moderate Buy consensus from 16 analysts, with an average price target of USD 396.80. That target sits below the October 7 intraday price of USD 406.28, while the same source lists Teradyne's 50-day moving average at USD 377.28.

For investors, the central tension is visible in those figures: quarterly revenue growth of 103.9 percent is substantial, but the average target remains below the live Nasdaq quote after the stock's large year-to-date advance. Teradyne's current session range runs from USD 405.61 to USD 416.62, with volume of 642,990 shares as of October 7, 2026.

Teradyne stock tests its valuation

Teradyne stock was last at USD 406.28 on Nasdaq on October 7, 2026 at 10:56 a.m. ET. The next earnings update is scheduled for October 27, 2026.

Upcoming dates for Teradyne stock

• October 11, 2026: IEEE International Test Conference
• October 27, 2026: Third-quarter earnings release

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