As major Central Processing Unit (CPU) related companies in the US stock market experienced historic surges, Printed Circuit Board (PCB) stocks in the domestic market also erupted with massive buying pressure, capturing investors’ attention. The AI investment boom, which had previously been centered on Graphics Processing Units (GPUs), is now highlighting the renewed importance of CPUs, spreading warmth across the entire related component market. This is because the role of the CPU in coordinating complex inference calculations and overall system operation has become more critical than ever as AI agents rapidly expand. In fact, major domestic PCB manufacturers, including Korea Circuit and Simmtech, recorded double-digit gains, firmly establishing themselves as market leaders. In this article, we will take a detailed look at which stocks are benefiting from this massive market shift. This will be a great opportunity for readers to broaden their perspective on reading market trends.
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Why Domestic PCB Stocks Soared on AMD and Intel’s Surge: Analysis of Beneficiary Stocks

1. The CPU Boom Hitting the US Stock Market

In the US New York stock market, major semiconductor companies such as AMD and Intel recorded double-digit surges in a single day, shocking global financial markets. In particular, AMD’s stock price jumped by more than 10%, confidently crossing the $1 trillion market capitalization milestone and joining the ranks of giant semiconductor companies following Nvidia and Broadcom. Intel also showed remarkable performance, soaring by more than 12%, far exceeding market expectations. The core background behind this collective cheer from semiconductor-related stocks is the expectation that AI-related investments will not be a temporary phenomenon but will expand more robustly. The Philadelphia Semiconductor Index also recorded a four-digit rise, firmly supporting the positive outlook for the overall semiconductor industry. Numerous investors in the market predicted that this massive semiconductor rally in the US would immediately trigger significant ripple effects in the domestic stock market. Indeed, as soon as the market opened on Monday morning, buying pressure began to surge in the stock windows of domestic related component manufacturers, conveying the intense heat of the market.
CPU-related companies in the US stock market recorded historic surges, strongly boosting investor sentiment across the global semiconductor market.
2. The Popularity Boom of Meta’s AI Agent

The decisive trigger behind the explosive rise in US semiconductor stocks was the personal AI agent service unveiled by the global giant Meta. Recently, Meta launched an innovative AI assistant app to the market that perfectly handles daily tasks on behalf of users. Unlike other companies developing large language models that have primarily focused on the enterprise market, Meta achieved clear differentiation by focusing on the daily lives of the general public. This assistant program not only composes and sends important emails on behalf of users but also skillfully performs complex travel itinerary reservations. According to a market research firm, the app achieved the feat of ranking number one in free downloads on both the US Apple App Store and Google Play Store just two weeks after its release. With millions of downloads occurring within days of launch, it easily surpassed existing strong competitors, recording an overwhelming popularity score. Since it integrates naturally with the messaging service used by hundreds of millions of people worldwide, the actual number of users is estimated to be much higher than the official download records.
Meta’s personal AI agent, which swept global app store rankings, acted as a catalyst to explode CPU demand.
3. A Major Shift from Learning to the Era of Inference

With the dawn of the new AI agent era, the CPU, which had previously been in the shadows, is once again being strongly highlighted as a core semiconductor. In the early stages of AI technology development, the process of learning vast amounts of information was crucial, so the GPU held the absolute throne. However, as the technology moved into the inference stage—understanding user commands and translating them into action—the situation began to change completely. This is because the CPU plays the role of the chief commander that coordinates and manages the entire system, allowing numerous GPUs to perform their respective roles smoothly. Given the nature of agent services that must smoothly run various applications and process massive data in real-time, demand for high-performance CPUs is bound to explode. This structural change is providing huge business opportunities not only to CPU manufacturers but also to component partners that robustly support them. The center of the market is naturally shifting from simple learning chips to high-performance chips that coordinate complex calculations.
The arrival of the inference calculation era led by AI agents has significantly elevated the status of the CPU, which coordinates the entire system, compared to the past.
4. Why Domestic PCB Stock Prices Caught Fire

This massive change in the US immediately translated to the domestic stock market, becoming the fuse that caused the stock prices of companies producing Printed Circuit Boards (PCBs) to skyrocket. As the AI server market grows explosively, the importance of high-performance PCBs that stably connect core semiconductors inside servers is increasing day by day. Massive orders are pouring in for companies that manufacture special PCBs to connect high-performance chips like CPUs and GPUs to motherboards without error. In fact, according to data from an AI-based investment information platform, representative domestic PCB manufacturers closed the trading day with enormous gains compared to the previous day. From companies with high-difficulty technical capabilities to connect chips to servers, to companies making components that tightly integrate memory and chips, all cheered. This stock price strength is interpreted as a result of the market’s confidence that AI server investments will directly translate into actual performance, rather than a temporary thematic rise. The value of a few domestic companies with the technical capability to mass-produce high-spec PCBs stably is being re-evaluated.
The combination of expanded AI server investments and increased demand for high-performance PCBs caused the stock prices of domestic related component manufacturers to surge collectively.
5. Representative Domestic Beneficiary Stocks That Soared

The star that received the most eye-catching score in the domestic stock market the previous day was Korea Circuit, which specializes in producing Flip Chip Ball Grid Array (FC-BGA) PCBs. The company recorded a massive surge of over 15% compared to the previous trading day, attracting intense market attention. Following this, Simmtech, a memory PCB manufacturer that plays a crucial role right next to the CPU, also easily broke through double-digit gains, erupting with massive buying pressure. DaeDuck Electronics, which covers both server PCBs and high-performance interconnect PCBs, also drew a steep upward curve of over 10%, making investors smile. TLV, which develops PCBs for next-generation memory interconnect technology, also soared by more than 15%, injecting strong warmth into the entire related industry. In addition, almost all stocks related to semiconductor PCBs, including Interflex, Gigabyte, and major conglomerate affiliates like LG Innotek, Samsung Electro-Mechanics, and LS Pegasus, closed with gains, erupting with blue buying pressure.
Major domestic companies producing high-performance PCBs, such as Korea Circuit and Simmtech, led the market by recording double-digit gains.
6. Future Outlook and Wise Investment Strategies

The CPU boom hitting the US and the simultaneous rise in domestic PCB stocks clearly show that the AI industry is entering a new phase. As agent services that think and act independently in real daily life become the mainstream, moving beyond the initial simple learning stage, demand for related components is expected to continue increasing. Therefore, investors should not just watch the stock price movements of large semiconductor manufacturers but carefully examine the potential for performance improvement in small and medium-sized component companies that supply actual parts underneath. In particular, PCB specialist companies that have built entry barriers based on advanced technical capabilities are undoubtedly core stocks that must be included in a portfolio from a long-term perspective. However, rather than a strategy of recklessly chasing buying due to short-term stock price surges, the wisdom to calmly wait for market corrections is needed. We hope you will accurately select the true beneficiaries of the coming agent era and complete a wise and successful investment.
Continuous interest and a strategic approach are needed for high-quality domestic PCB companies supplying high-performance components in line with the growth of the AI agent era.
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