Memory chip index plunges 6.36% as semiconductor selloff deepens

The US memory chip and hardware supply chain index tumbled 6.36% to 207.63 on Wednesday, extending a sector rout that has erased more than $50 billion in market value over the past week as investors fled semiconductor stocks amid mounting demand concerns.

"The selloff reflects growing unease that memory chip demand is softening just as new supply capacity comes online," said Rachel Kim, semiconductor supply chain analyst at Edgen. "The inventory correction we've been tracking appears to be arriving sooner than many expected."

Western Digital Corp. led the decline, falling 8.78%, while SanDisk Corp. dropped 8.12% and Micron Technology Inc. slid 8.02%. Seagate Technology Holdings PLC fell 5.69%, Teradyne Inc. declined 4.82%, Lam Research Corp. dropped 4.15%, Applied Materials Inc. slipped 3.47%, and Rambus Inc. lost 2.36%. The broad-based selloff pushed the Philadelphia Stock Exchange Semiconductor Index, or SOX, to trade nearly 15% below its mid-June record high.

The rout in memory and semiconductor stocks has accelerated as multiple headwinds converge. Geopolitical tensions in the Middle East have pushed crude oil prices sharply higher, with West Texas Intermediate crude surging 9% to near $78 a barrel on Monday after President Donald Trump reinstated a blockade of Iranian ships in the Strait of Hormuz. Higher energy costs threaten to squeeze margins across chip manufacturing, which is energy-intensive. At the same time, minutes from the Federal Reserve's June 16-17 meeting showed growing concern among policymakers that inflation remains elevated, with several officials signaling they would support raising interest rates if price pressures persist. The Fed's hawkish tilt has weighed on growth-sensitive technology stocks, with the Nasdaq Composite falling 1.6% on Monday.

The selloff has been particularly brutal for memory chipmakers, which had been among the biggest beneficiaries of the artificial intelligence infrastructure buildout. SK Hynix Inc., the South Korean memory giant whose US listing was more than seven times oversubscribed, saw its shares tumble 15% in Seoul trading on Monday, wiping out much of the gains from its Nasdaq debut last week. The company's US-listed shares fell more than 9% on Monday after jumping 13% in their first partial day of trading on Friday. Rival Samsung Electronics Co. dropped 11% in Korean trading on the same day. The Roundhill Memory ETF, which counts Samsung, SK Hynix, and Micron as its top holdings, sank nearly 10% on Monday.

For investors, the question is whether this is a cyclical correction in an overheated sector or the start of a deeper downturn. The SOX more than doubled between late March and mid-June as investors piled into AI-linked chip stocks, pushing valuations to levels that some analysts considered unsustainable. Micron shares, which had rallied more than 60% year-to-date before this week, now trade at roughly 18 times forward earnings, down from 24 times at the June peak. If the inventory correction materializes as Kim and other analysts anticipate, memory chipmakers could face pressure on both revenue and margins in the second half of the year.

This article is for informational purposes only and does not constitute investment advice.