MU, SNDK, DRAM Inch Higher Overnight After Mixed Week: Japan's Kioxia Plunges After Cautious Memory Outlook

What happened

Kioxia forecast December-quarter operating profit of 2 trillion yen, below analyst estimates and only slightly above its September-quarter result of 1.99 trillion yen. Its shares fell 15% at Monday’s Tokyo open. Micron and SanDisk rose about 2.4% each overnight, while the Roundhill Memory ETF gained 2.7%.

Confirmed

Global impact / market context

Kioxia’s cautious forecast points to slower profit growth at a major memory-chip producer, which can temper expectations for the sector. If demand for fast NAND storage from data centers does not translate into stronger sales or pricing, chipmakers’ revenue growth and spending plans could face pressure.

Analyst inference

The article describes mixed signals across memory and broader chip stocks: Kioxia’s outlook disappointed, while SanDisk reported upbeat results and a better forecast but fell sharply on Friday. Samsung missed profit expectations and Intel’s guidance disappointed, leaving recent share moves uneven rather than showing a clear sector direction.

Confirmed

What to watch

1. Watch Kioxia’s reported December-quarter operating profit against its 2 trillion yen forecast; the result will show whether the cautious outlook translated into weaker earnings. Analyst inference
2. Track whether demand from AI data center operators for fast NAND storage continues to support Kioxia’s profits; the article links that demand to recent sharp growth. Analyst inference
3. Compare upcoming company results and forecasts across memory makers with share moves, since the article shows that upbeat guidance did not prevent SanDisk from falling. Analyst inference

Evidence

• stocktwits.com