What Happened?

A number of stocks jumped in the afternoon session after a wave of upbeat earnings reports and bullish forecasts from key industry players signaled robust and sustained demand for artificial intelligence technology. 

The rally was sparked by strong quarterly results from several AI-related firms, reinforcing investor confidence in the sector. Super Micro Computer, a seller of servers and other AI equipment, saw its shares jump after its earnings per share came in 84% higher than expected and it provided a revenue forecast that topped estimates. Similarly, CoreWeave, which provides cloud computing for AI systems, rallied after its sales forecast also exceeded expectations. 

This positive sentiment echoed globally, with Asian markets gaining as traders bought into AI- and semiconductor-related shares. The optimism is further supported by fundamental data, such as a reported 155% year-over-year surge in South Korea's semiconductor exports for early August. 

AI racks consume GPUs, CPUs, high-bandwidth memory, and storage. When a large server OEM and a major AI cloud operator both lift the path of future shipments, investors typically reprice the chip makers that supply those systems which helps explain the gains in Nvidia, AMD, and Intel.

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 Marvell Technology (NASDAQ: MRVL) jumped 4.5%. Is now the time to buy Marvell Technology? Access our full analysis report here, it’s free.
• Analog Semiconductors company MACOM (NASDAQ: MTSI) jumped 5.4%. Is now the time to buy MACOM? Access our full analysis report here, it’s free.
• Memory Semiconductors company Micron (NASDAQ: MU) jumped 6.9%. Is now the time to buy Micron? Access our full analysis report here, it’s free.
• Memory Semiconductors company Western Digital (NASDAQ: WDC) jumped 4.1%. Is now the time to buy Western Digital? Access our full analysis report here, it’s free.
• Semiconductor Manufacturing company Semtech (NASDAQ: SMTC) jumped 6.9%. Is now the time to buy Semtech? Access our full analysis report here, it’s free.

Zooming In On Semtech (SMTC)

Semtech’s shares are extremely volatile and have had 58 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 19 days ago when the stock dropped 5% on the news that the U.S. government announced new tariffs of 10% to 12.5% on 60 trading partners over concerns related to forced labor. The targeted nations include the European Union, Japan, South Korea, and Taiwan—the fundamental pillars of the global semiconductor supply chain. While the U.S. designs many of the world's leading chips, the industry relies heavily on imported specialty chemicals, raw silicon wafers, and multi-million-dollar fabrication equipment from these exact regions. Furthermore, many U.S. chipmakers use Outsourced Semiconductor Assembly and Test (OSAT) facilities overseas, meaning finished chips imported back into the U.S. could now face double-digit taxes. Because these new Section 301 tariffs are considered legally durable and potentially permanent, investors are pricing in long-term margin compression across the U.S. hardware and semiconductor space. This triggered a broad sell-off across the entire sector, amplifying a global rout that began overnight with Asian chip heavyweights Samsung and SK Hynix.

Semtech is up 88.6% since the beginning of the year, but at $141.91 per share, it is still trading 16.2% below its 52-week high of $169.35 from June 2026. Investors who bought $1,000 worth of Semtech’s shares 5 years ago would now be looking at an investment worth $2,200.

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