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US chip stocks extend slide as China memory report, AI spending jitters hit sector

By Thomson Reuters Oct 13, 2026 | 9:46 AM

Oct 13 (Reuters) – Shares of US chipmakers dropped on Tuesday, with memory-related companies leading losses as reports of a technology advance by China’s CXMT ​stoked competition fears and added to jitters ‌over AI spending in a sector that has rallied sharply this year.

The broader Philadelphia chips index fell 1.5%, down for the fifth straight session and at its lowest in about four weeks.

Here ‌are ​the details:

• Memory chipmaker Micron slipped ⁠4.5% to its lowest ⁠since September 16, its fourth straight daily decline

• Data storage companies Sandisk slid 4.3%, Seagate Technology dropped 5.9% and Western Digital declined 5.8%

• Media reports ​this week said Chinese memory chip giant CXMT has made “key progress” on a new cell architecture to ⁠boost memory density

• Samsung Electronics ⁠and SK Hynix are also working on ​a similar innovation

• In South Korea, shares of memory chip ​giant Samsung tumbled over 7% and SK Hynix ‌slid more than 10%

• “When you back off and realize there might be competition coming, all the sheep run to the door at the same time,” said Robert ⁠Pavlik, senior portfolio manager at Dakota Wealth, describing the move as a rush to take profits

• Broadcom CEO Hock Tan ⁠on Monday compared ‌AI sector investments to “casino gambling”

• Broadcom ⁠shares fell 0.3% in sector-wide weakness

• Chip ​giant ‌Nvidia slipped 0.4%, Intel fell 1.1%, AMD ​dropped 1.2% ⁠and Marvell Technology declined 2.2%

• Despite recent losses, the Philadelphia chips index is up over 70% so far this year, having rallied on hopes of robust AI-related demand

(Reporting by Shashwat Chauhan and Purvi Agarwal in Bengaluru; Editing ​by Shinjini Ganguli)