(C) KIOXIA

TOKYO/SEOUL/NEW YORK – Japanese flash memory maker Kioxia Holdings saw its shares plummet to the daily lower limit on November 14th, following the release of second-quarter earnings that severely missed market expectations despite a generally optimistic outlook for the global semiconductor industry. The sharp decline in Kioxia's stock triggered a ripple effect, dragging down the share prices of major chipmakers in South Korea and the United States, including Samsung Electronics and SK Hynix.

Kioxia's Performance Misses Mark 

Kioxia's shares, listed on the Tokyo Stock Exchange, opened at ¥10,025, a steep 23.03% drop, hitting the technical lower limit set by Japanese trading rules for stocks priced above ¥10,000. This limit is a fixed ¥3,000, unlike the percentage-based limits found in other markets.

The previous day, after the market close, Kioxia reported Q2 2025 fiscal year revenue of ¥448.3 billion, a 6.8% decrease year-over-year. Net income suffered an even more dramatic decline, plummeting 62% to ¥41.7 billion. Segment-wise, the Smart Device division, which supplies flash memory for smartphones, posted ¥157.3 billion, while the SSD and Storage division recorded ¥244.6 billion, down 10.8% from the previous year.

Global Chip Market Shaken 

Kioxia's poor performance immediately sent tremors through the global semiconductor market. On the U.S. stock market, the Philadelphia Semiconductor Index tumbled 3.72%. Leading chip-related stocks also saw significant drops, including Micron (-3.25%), AMD (-4.23%), ARM (-5.67%), and Lam Research (-5.02%).

South Korean chip giants were not immune. Samsung Electronics shares fell 3.99% to ₩98,700 on the KOSPI market, while SK Hynix stock plunged 6.21% to ₩574,000. Notably, SK Hynix holds a significant stake in Kioxia through the Pangea Fund.

Over-Reliance on Mobile Flash Cited as Key Factor 

Market analysts suggest that Kioxia’s underwhelming results are largely attributable to a business structure heavily skewed toward mobile flash memory, much of which is supplied to major clients like Apple for the iPhone. The comparison against aggressive sales figures recorded in 2024, ahead of a planned Initial Public Offering (IPO), also contributed to the perceived slump.

Ryu Young-ho, an analyst at NH Investment & Securities, pointed to a "negative product mix" as the catalyst for the poorer-than-expected earnings. Ryu noted that Kioxia's high proportion of the mobile segment—which typically yields lower profit margins and involves large-volume contracts with single clients—contrasted unfavorably with the sustained strong demand seen in the more lucrative enterprise SSD (eSSD) market. The difficult year-over-year comparison against an exceptionally robust 2024, driven by pre-IPO push, further exacerbated the poor showing.

The results serve as a cautionary signal, reminding investors that even within a broadly bullish sector, specific product mixes and customer concentration can leave companies vulnerable to abrupt market corrections.