Bloody Sunday for Kioxia: Why the Memory Maker’s Shares Plunged 9%

Introduction: The Day Investors Rushed for the Exit

Monday was a difficult day for Kioxia shareholders. Shares of the Japanese NAND memory giant fell by 9.3%, dropping to ¥69,850 per share. For a company that completed one of Japan’s largest IPOs in recent years only a few months ago, such a decline looks particularly painful.

So, what happened? There was no corporate news—no financial reports, scandals, or management changes. The reason for the decline lies elsewhere. Investors became cautious ahead of a crucial week for the global semiconductor sector. Quarterly results from key industry players ASML and TSMC are expected to provide signals regarding capital expenditure on artificial intelligence, demand for memory, and the outlook for semiconductor spending in the second half of the year.

However, this is only part of the story. Kioxia shares are also under pressure from Bernstein’s bearish stance. Last month, the brokerage reaffirmed its “Sell” rating with a target price of ¥40,000. This comes despite the fact that most analysts remain optimistic about the company. The gap between expectations and reality created the perfect storm for the share-price decline.

ASML and TSMC: Key Signals for the Entire Industry

Why ASML’s Results Matter to Kioxia

ASML is not merely a manufacturer of chipmaking equipment. It is a barometer for the entire semiconductor industry. The company produces lithography machines without which modern processors and memory chips cannot be manufactured. Its financial results show how much customers are prepared to invest in new production capacity.

If ASML reports an increase in orders, it will signal that semiconductor demand continues to grow and manufacturers are expanding production. If orders decline, however, this could point to an industry slowdown.

For Kioxia, which produces NAND memory, signals from ASML are critically important. If chipmakers reduce capital expenditure, it may mean they expect weaker demand for finished products. This, in turn, could negatively affect memory prices and Kioxia’s profits.

TSMC as an Indicator of AI Demand

TSMC is the world’s largest contract semiconductor manufacturer. Its reports show how many customers are ordering chip production and which technologies they are choosing. Data on orders for artificial intelligence chips is particularly important.

AI has become the primary growth driver for the semiconductor industry in recent years. Companies around the world are investing billions of dollars in AI infrastructure, creating enormous demand for memory and computing power.

However, this demand is not unlimited. Investors are beginning to ask whether the AI market has become overheated. Could slower growth lead to a collapse in memory prices? TSMC’s results are expected to help answer these questions.

Bernstein’s Bearish View: A Voice of Reason or a Warning Signal?

A Forecast That Contrasts Sharply with the Market

Bernstein is a well-known brokerage firm with a reputation for serious analytical research. Its “Sell” recommendation on Kioxia shares therefore carries particular weight amid the market’s general optimism. Most analysts view Kioxia as a promising company with strong growth potential, but Bernstein sees substantial risks.

Its target price of ¥40,000 is almost 43% below the current share price. Such a wide gap between Bernstein’s valuation and the market price suggests that the brokerage considers Kioxia shares significantly overvalued.

Acknowledging Strong Short-Term Momentum

Interestingly, Bernstein does not deny Kioxia’s strong short-term earnings momentum. High NAND prices and AI-related demand are indeed generating significant revenue for the company. The problem is that investors are valuing peak earnings as though they will remain sustainable over the long term.

According to Bernstein’s analysts, this is a mistake. The memory market has historically been cyclical. Every boom is eventually followed by a downturn when supply begins to exceed demand. If investors price perpetual growth into the shares, they risk being disappointed when the cycle reverses.

Historical Context: From the Bottom to the Top—and Back Again

The Post-IPO Surge

Kioxia shares have travelled a long way since the company’s IPO in December 2024. The company went public after several unsuccessful attempts, and investors welcomed the listing enthusiastically. The 52-week high reached ¥112,700—almost twice the current price.

This surge reflected market optimism regarding the prospects of NAND memory. Demand for AI infrastructure, growth in cloud computing, and the increasing volume of data all created favourable conditions for memory manufacturers. Investors believed Kioxia would be able to capitalise on these trends and significantly increase its profits.

The Retreat from the Peak

However, the shares have now fallen considerably from their peak. The current price of ¥69,850 represents a decline of almost 38% from the highest level. Although the shares remain significantly above their 52-week low of ¥2,270, the scale of the decline is impressive.

This serves as a reminder of the semiconductor sector’s volatility. Shares can rise rapidly, but they can fall just as quickly. Investors who purchased the stock near its peak are now facing substantial losses.

The Broader Context: What Is Happening in the Semiconductor Market?

The Nikkei 225 Under Pressure

On Monday, the Nikkei 225 traded lower, with semiconductor stocks leading the decline. Investors reduced their positions ahead of the ASML and TSMC earnings reports, putting pressure on the entire sector.

Kioxia was not the only company affected by this trend. Other Japanese chipmakers and related businesses also showed negative performance. This suggests that the problem is systemic rather than specific to Kioxia.

Volatility in Global Chipmaker Stocks

Recent weeks have been marked by increased volatility in shares of semiconductor manufacturers worldwide. Markets are reassessing whether high AI-related valuations can be sustained amid increasingly demanding investor expectations.

This is a natural correction following a period of rapid growth. However, it creates additional pressure on shares, particularly those with high beta and strong exposure to the macroeconomic cycle.

Kioxia’s Outlook: What Comes Next?

Dependence on NAND Demand

Kioxia remains heavily dependent on NAND memory prices. If demand continues to grow and prices remain high, the company will be able to deliver strong financial results. However, if the memory market cools—as it has done in the past—profits could decline sharply.

The main risk is oversupply. Memory manufacturers are actively expanding production capacity, and if demand fails to grow at the same pace, prices could collapse. This already happened in 2018–2019, when memory manufacturers’ shares suffered significant losses.

The Potential of Artificial Intelligence

On the other hand, AI could become a long-term growth driver for Kioxia. The volume of data generated by AI systems requires increasing amounts of memory. This creates fundamental demand that could offset cyclical market fluctuations.

For this to happen, however, investment in AI must continue to grow rather than slow down. If the market concludes that the AI boom is coming to an end, this would be a negative signal for Kioxia and other memory manufacturers.

What This Means for Investors

Short-Term Shock and Long-Term Potential

A 9.3% decline in the share price is a significant event for investors. However, it does not necessarily mean that the company is losing its fundamental advantages. Markets often react more strongly to external factors than to internal changes.

For long-term investors, the current decline could represent an opportunity. If Kioxia can maintain its position in the NAND market and benefit from growing demand for AI-related memory, its shares may recover.

The Role of ASML and TSMC’s Results

The results of ASML and TSMC will be key catalysts for Kioxia shares in the coming days. If the reports show strong demand and optimistic forecasts, they could support the shares and contribute to a recovery. If the data disappoints, the decline may continue.

Investors should monitor these developments closely. They will provide important signals about the health of the semiconductor industry and the outlook for memory manufacturers.

Conclusion: Volatility as a Way of Life in the Semiconductor Sector

Kioxia’s 9.3% share-price decline is not a catastrophe but a normal market reaction to uncertainty. The semiconductor sector has always been volatile, and investors entering this market must be prepared for sharp price movements.

The current situation is being driven by three key factors: anticipation of ASML and TSMC’s earnings reports, Bernstein’s bearish stance, and general investor caution ahead of major events. Together, these factors have created pressure on the shares that is not directly related to fundamental problems within the company.

Kioxia remains one of the leading NAND memory manufacturers, with strong long-term prospects. However, investors should take the cyclical nature of the memory market into account and remain prepared for volatility.

The coming days will be important for Kioxia shares. ASML and TSMC’s reports could either reassure investors or intensify the sell-off. In either case, the memory market remains one of the most interesting and unpredictable sectors of the global economy.

For those who believe in Kioxia’s long-term potential, the current decline may offer an attractive entry opportunity. However, it is important to remember the risks and avoid investing too much in a single asset. Diversification remains a key principle of successful investing, particularly in volatile sectors such as semiconductors.