[2026 Semiconductor Stock Investment Insights Part 1] The Real Reason Behind the Past Year's Semiconductor Surge That Economic Articles Don't Tell You

 Over the past year—or extending back to late 2023 up until now in 2026—the absolute, undisputed theme running through the stock market has been "Semiconductors."

Looking at the yield curves of NVIDIA and Nasdaq tech ETFs like QQQM in my own portfolio, I can viscerally feel how terrifyingly fast this market has expanded. Every day, financial news churns out superficial headlines like "The AI Revolution" or "NVIDIA's Earnings Surprise." However, from the perspective of someone who understands the physical architecture of data traffic, communication networks, and IT infrastructure, the semiconductor surge over the past year was not a mere "meme rally" or market madness. It was backed by massive, undeniable fundamentals.

Particularly now, as I closely monitor the market with plans to use this July as a major turning point—a timeline for liquidating and cashing out my stock and ETF portfolios—it is crucial to understand the why. Instead of blindly following the herd, I want to take a deep dive into why these stocks skyrocketed and what exactly is absorbing this colossal amount of capital.

This is a deep-dive analysis you won't find in standard news summaries. Let's begin [Part 1 of the 3-Part Semiconductor Series: The Fundamental Causes and Essence of the Semiconductor Surge Over the Past Year].

1. Beyond the Blind 'AI Fantasy': A Forced Era of Infrastructure Replacement

The media often attributes the semiconductor rally simply to the brilliance of generative AI like ChatGPT. But the biggest reason I see from monitoring the market is that this isn't just an evolution of software; it's the arrival of a "forced physical replacement of global IT infrastructure."

During past IT revolutions, you could handle increased traffic simply by adding a few more CPU-centric servers and slightly expanding network bandwidth. AI computation is on a completely different level. The current computing environment, which requires the simultaneous parallel processing of hundreds of billions of parameters, is fundamentally impossible to operate without tearing down and rebuilding the existing data center architecture from the roots up.

This is not a matter of choice. For big tech companies like Microsoft, Google, and Meta, building AI data centers isn't just "nice to have"—it's a "death race where failing to pour tens of billions of dollars right now means you cannot guarantee your company's survival three years down the line." This immense fear of survival and urgency forced astronomical capital expenditures (CAPEX) into the market over the past year, and the ultimate destination for that capital was AI accelerators and memory semiconductors.

2. An 'Overwhelming Supplier-Dominant' Market Created by Yield and Physical Limits

The most fascinating point to me during this semiconductor surge is the anomalous profitability created by bottlenecks. The basic law of supply and demand—if demand is high, just spin up the factories and print more—has been completely shattered in the cutting-edge semiconductor market.

HBM (High Bandwidth Memory) Cannot Be Mass-Produced Like Cookies Take HBM, the core of today's market, as an example. From an engineering standpoint, the process of vertically stacking several invisibly thin DRAM chips and piercing tens of thousands of microscopic holes (TSV) to connect the electrodes demands extreme physical difficulty. If even one chip slips during this process, the entire stack must be discarded. Therefore, securing initial yield (the ratio of defect-free, passable products) requires an immense amount of time and proprietary know-how.

In other words, even if the market shows up with piles of cash screaming, "Give me a million chips right now!", there is a clear physical limit to what can be produced. This creates a perfect asymmetry where supply can absolutely never catch up with demand. This dynamic handed semiconductor manufacturers an unprecedented, "absolute pricing power." In a market where they can dictate the price, it was a natural sequence of events for corporate operating margins to skyrocket.

The eSSD Shortage Sparked by Power Efficiency The recent explosive demand for eSSDs (Enterprise Solid State Drives) also stems from the fundamental limits of infrastructure. AI data centers are literal power-guzzling hippos. If massive power consumption and heat generation aren't controlled, servers go down, and overall network performance degrades. Consequently, companies were handed the agonizing homework of ripping out existing power-hungry HDDs (Hard Disk Drives) and replacing them with low-power, high-efficiency eSSDs. The fact that the NAND flash market, which had been suffering from chronic deficits, transformed into a goose laying golden eggs in just one year is hiding behind this desperate war for power efficiency.

3. The Butterfly Effect Spreading to Legacy Semiconductors: A Perfect Earnings Turnaround

The reason I had strong conviction in this bull market was that this boom didn't just stop at one specific AI chip; it triggered a structural upward shift (a butterfly effect) across the entire semiconductor industry.

With all the money, manpower, and production lines (CAPA) concentrated on high-margin, expensive HBM and server chips, what happened? Paradoxically, the supply of 'legacy DRAM' used in the smartphones and general PCs we use every day drastically shrank.

From an investor's perspective, this is a flawless scenario. High-end AI chips are sold with massive margins, while at the bottom end, general legacy chips naturally see price increases due to supply shortages, clearing out bad inventory. In other words, both the top and bottom lines on the financial statements of semiconductor companies improved simultaneously. It was a "perfect earnings-driven market proven by numbers" that unfolded over the past year. A rise driven by quarterly operating profits in the billions is qualitatively entirely different from a bubble driven purely by expectations.

4. The Approaching Inflection Point: What Should We Look At?

Looking back at the explosive surge of the past year, the market ultimately bet on "clear future cash flows." The tens of billions of dollars in CapEx guidance announced by Big Tech were essentially 'guaranteed revenues' for semiconductor companies for the next few years.

However, one of my ironclad investment rules is that "even the party everyone believes will last forever eventually ends, and inflection points exist." As I mentioned earlier, this is why I am treating this July as a critical juncture for exiting and restructuring my entire portfolio. The market's fatigue regarding valuations that have risen steeply in the short term, combined with complex macroeconomic variables like regulatory checks by various countries and delayed interest rate cuts, are all intertwining.

Nevertheless, the reason this massive rise over the past year cannot be dismissed simply as a liquidity-driven 'bubble' is because it is grounded in the unshakable fundamentals I explained at length: "the scarcity of ultra-gap technology hitting physical limits" and "the forced infrastructure replacement by companies fighting for survival."

📝 Part 1 Summary and Conclusion

Let me summarize the core of Part 1 once again through my own lens.

We must break away from the flat, article-style interpretation that "semiconductors went up just because AI became popular." First, an environment was created where Big Tech companies had no choice but to pour astronomical amounts of money into AI infrastructure just to survive. Second, core chips like HBM and eSSD formed a 'perfect supplier-dominant' market where they couldn't be instantly mass-produced regardless of the money offered, due to extreme process difficulties. Third, this led to controlled supply even down to legacy semiconductors, proving a dramatic turnaround in earnings for the entire industry through actual numbers.

So, into whose mouths did this massive waterfall of capital pour the most?

In the upcoming <Part 2>, I will dig deeper with a sharper perspective into "Who are the real leading stocks currently dominating the semiconductor market (design, foundry, equipment, etc.), and how have they built an exclusive ecosystem to lead the market?"

For real investment insights to survive the stock market, please make sure not to miss the Part 2 post!