The global stock market is currently witnessing a "semiconductor rally" of historic proportions. As artificial intelligence (AI) transitions from a futuristic concept into a core industrial engine, the valuation of chipmakers is reaching heights that many analysts describe as "surreal." While the Wall Street Journal (WSJ) and various market experts warn of potential overheating, they also point out a fundamental difference between today’s boom and the infamous dot-com bubble of the early 2000s: this time, the gains are backed by cold, hard cash.

The Magnitude of the Rally According to recent reports, the combined market capitalization of semiconductor companies within the S&P 500 index has surged by a staggering $3.8 trillion (approximately 5,560 trillion KRW) in just the last six weeks. The individual stock performances are even more eye-popping. Over the past year, SanDisk witnessed a monumental rise of 4,039.7%, while Micron and Intel climbed 769.8% and 483.2%, respectively.

This momentum shows no signs of slowing down. On Friday, May 8, Intel’s shares jumped another 14% following reports of a preliminary chip-manufacturing deal with Apple, and Micron rose by 15.5%. Analysts at Barclays noted in a letter to clients, "Keep in mind that 'crazy' moves can last much longer than the general public typically believes."

The Catalyst: The Evolution of AI Agents The primary driver behind this relentless demand is the evolution of generative AI. While the initial phase of the AI boom focused heavily on Graphics Processing Units (GPUs), the landscape has shifted. The emergence of "agentic AI"—advanced models capable of autonomous task execution, such as those released by Anthropic late last year—has triggered a massive need for 24/7 data processing.

This shift has expanded the demand across the entire semiconductor spectrum, including traditional Central Processing Units (CPUs) and high-capacity memory chips. Big Tech companies are currently in a "buying frenzy," securing every available computing resource to power their data centers, which in turn provides chipmakers with record-breaking profit margins.

Profits vs. Bubbles: A Different Kind of Mania The skepticism regarding a "bubble" is natural, yet the financial data suggests a different narrative compared to the late 1990s. During the dot-com era, many soaring companies had little to no actual earnings. In contrast, today’s semiconductor leaders are generating unprecedented profits.

Take Micron Technology, the world’s third-largest memory manufacturer, as an example. For the 2026 fiscal year, analysts project the company will generate $107 billion in revenue and $77 billion in operating profit. This is a dramatic turnaround from the 2023 fiscal year, where the company reported a mere $15.5 billion in revenue and an actual operating loss. This "profit-backed rally" provides a cushion that the 2000s tech stocks lacked.

The Warning Signs: "The Party Before the Police" Despite the robust fundamentals, seasoned investors remain cautious. Peter Feinberg, a 64-year-old retired lawyer and investor in Broadcom and TSMC, described the recent gains as "somewhat surreal." While he continues to hold his positions, he remains wary of the risks.

"I am well aware of the concept that the party is most enjoyable thirty minutes before the police arrive to break it up," Feinberg told the WSJ. He added a timeless warning for all market participants: "The most dangerous words for an investor are 'this time is different.' In my opinion, the market has become too expensive."

Conclusion The current semiconductor rally is a phenomenon driven by a genuine technological revolution and explosive corporate earnings. However, as valuations reach "surreal" levels, the line between a justified bull market and a dangerous bubble becomes increasingly thin. While the rally may indeed last longer than expected, the advice from Wall Street is clear: enjoy the party, but keep one eye on the exit.

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