What Happened?

A number of stocks fell in the afternoon session after China initiated a trade barrier investigation against the United States, escalating trade tensions. China's Ministry of Commerce announced it would begin two probes into U.S. trade practices, alleging they have disrupted global supply chains. 

The move was seen as a direct retaliation to tariff investigations started by the U.S. administration earlier in the month. One Chinese investigation will specifically examine U.S. policies that restrict the export of advanced technology products to China and limit bilateral investment in key sectors. This action raises concerns about further trade restrictions and potential impacts on U.S. tech companies that have significant business operations and sales in the Chinese market. 

Adding to the concern, geopolitical tensions in the Middle East were projected to drive supply chain disruptions for key materials. The conflict reportedly tightened the global supply of helium, an essential element used in the manufacturing of semiconductor chips. This scarcity is driving up the price of helium, creating production challenges and increasing costs for chipmakers. The situation introduces another layer of uncertainty for the tech sector, as rising energy prices linked to the conflict stoked broader inflation concerns, potentially impacting consumer demand and business investment in technology.

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 Semtech (NASDAQ: SMTC) fell 3.6%. Is now the time to buy Semtech? Access our full analysis report here, it’s free.
• Analog Semiconductors company Impinj (NASDAQ: PI) fell 3.5%. Is now the time to buy Impinj? Access our full analysis report here, it’s free.
• Semiconductor Manufacturing company IPG Photonics (NASDAQ: IPGP) fell 2.8%. Is now the time to buy IPG Photonics? Access our full analysis report here, it’s free.

Zooming In On Semtech (SMTC)

Semtech’s shares are extremely volatile and have had 44 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.

The previous big move we wrote about was 1 day ago when the stock dropped 5.3% on the news that investors reacted to news of Google's new TurboQuant algorithm, a tool that threatens to significantly reduce memory requirements for artificial intelligence models. 

The market's interpretation is that this increased efficiency could lead to a structural decrease in demand for memory chips, sparking a sector-wide sell-off. Sandisk saw its stock fall by as much as 8%. The concerns generated by Google's announcement overshadowed recent strong earnings from memory-makers. Adding to the sector's headwinds are reports that competitor SK Hynix is considering a potential $14 billion U.S. listing, which would increase competitive supply pressure in the market.

Semtech is down 2.5% since the beginning of the year, and at $73.35 per share, it is trading 23.8% below its 52-week high of $96.30 from March 2026. Despite the year-to-date decline, investors who bought $1,000 worth of Semtech’s shares 5 years ago would now be looking at an investment worth $1,105.

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