Teradyne, Navitas Semiconductor, SiTime, ACM Research, and Ultra Clean Holdings shares plummet, what you need to know

What happened?

A number of stocks fell in the morning session after accelerating annual wholesale inflation pushed Treasury yields higher as executive turmoil at Nvidia pressured chipmakers.

The U.S. Bureau of Labor Statistics reported that October’s producer price index rose 0.3% month on month. That was marginally below the 0.4% increase expected by economists polled by Dow Jones, CNBC reported. However, unadjusted final demand climbed 6.5% over the past twelve months, the fastest annual pace since November 2022, pushing the 10-year Treasury yield up nearly four basis points to 5.14%.

Northlight Asset Management Chief Investment Officer Chris Zaccarelli told CNBC that persistent price pressures keep the Federal Reserve on course to raise interest rates in December. When benchmark bond yields sit above 5%, elevated equity valuations face immediate discount-rate pressure.

The stock market overreacts to news, and big price drops can present good opportunities to buy high-quality stocks.

Among others, the following stocks were impacted:

• Semiconductor manufacturing company Teradyne fell 5.4%. Is now the time to buy Teradyne? Access our full analysis report here, it’s free.
• Analog semiconductors company Navitas Semiconductor fell 8.2%.
• Analog semiconductors company SiTime fell 6.4%.
• Semiconductor manufacturing company ACM Research fell 7.1%.
• Semiconductor manufacturing company Ultra Clean Holdings fell 6.4%.

Zooming in on Navitas Semiconductor

Navitas Semiconductor’s shares are extremely volatile and have had 111 moves greater than 5% over the last year. In that context, today’s move indicates the market considers this news meaningful but not something that would fundamentally change its perception of the business.

Navitas Semiconductor is up 4.3% since the beginning of the year, but at $8.74 per share, it is still trading 72.5% below its 52-week high of $31.79 from May 2026. Despite the year-to-date gain, investors who bought $1,000 worth of Navitas Semiconductor’s shares 5 years ago would now be looking at only $433.58.

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