Kioxia Shares Fall 15% After Record Quarter as Outlook Disappoints

Kioxia shares fell as much as 15% on Monday, November 2, 2026, even though the Japanese memory chip maker had just reported a record quarter. Investors were not reacting to the past quarter. They were reacting to the next one, because Kioxia forecast lower profit than analysts had expected. Bloomberg reported the fall, as covered by TechInAsia.

What happened

Kioxia makes NAND flash memory, the storage chip inside solid state drives, phones, and data centre racks. For the July to September quarter, it reported revenue of 2.48 trillion yen and operating profit of about 1.99 trillion yen, a record for the company.

For the October to December quarter, Kioxia forecast revenue of about 2.5 trillion yen and operating profit of about 2 trillion yen. That forecast was below analyst expectations of about 2.35 trillion yen for operating profit, according to Bloomberg reporting.

In Tokyo trading on November 2, the shares fell as much as 15% from the October 30 close of 13,470 yen, to an intraday low of 11,450 yen. Kioxia said the limited growth mainly reflected shipment timing rather than weaker demand. Some orders were pulled into the September quarter, while other orders were pushed to the March quarter because enterprise storage products need longer lead times. The company also said demand from AI data centre operators remained robust.

Bloomberg also reported that NAND flash average selling prices rose only in the mid 20 percent range in the July to September quarter, against a 70 percent increase in the previous quarter. That slower price rise helped explain why investors worried that the rapid growth phase could be cooling, even though prices were still rising.

Why it matters for beginners

A share price does not only reflect how a company did last quarter. It also reflects what investors expect next. When a company reports strong results but gives a weaker outlook than expected, the shares can still fall, because the market had already priced in higher hopes.

This is a useful lesson for beginners: good news in the past does not guarantee a rising share price today. Expectations matter, and a forecast that is below expectations can move a share sharply, even for a company in a growing area such as AI storage. This is similar to the wider AI memory story covered in our earlier report on Samsung posting a record profit as AI memory demand surged.

A single day fall also does not tell you what will happen next. It shows how the market reacted to one forecast on one day, not a verdict on the whole company.

What to watch next

Watch whether Kioxia confirms that the slowdown was mainly shipment timing, with orders returning in the March quarter, or whether price growth keeps slowing. Watch NAND prices and demand from AI data centres, and watch whether other memory makers give a similar message about the December quarter. Watch whether the shares stabilise after the November 2 fall, or keep falling as investors rethink how fast memory profits can grow.

FAQ

Why did Kioxia shares fall if it reported a record quarter?

The shares fell because the forecast for the October to December quarter was below analyst expectations. The market reacted to the outlook, not just to the record July to September results.

What did Kioxia actually forecast?

Kioxia forecast October to December revenue of about 2.5 trillion yen and operating profit of about 2 trillion yen, below analyst expectations of about 2.35 trillion yen for operating profit.

What did Kioxia say caused the slower outlook?

Kioxia said shipment timing was the main factor, with some orders pulled into the September quarter and others pushed to the March quarter because enterprise storage products need longer lead times. It said demand from AI data centre operators remained robust.

How much did the shares fall on November 2?

The shares fell as much as 15% in Tokyo trading, from the October 30 close of 13,470 yen to an intraday low of 11,450 yen, according to Bloomberg reporting.

Does a 15% fall mean the company is in trouble?

Not on its own. It shows investors were disappointed by the forecast on that day. The record quarter and the timing explanation are also part of the picture, and the next quarters will show whether growth picks up again.