Analysis
Asia's memory-chip makers had their worst session in months on Tuesday, with SK Hynix closing down 14.65% and Samsung Electronics off more than 13% in Seoul, while Japan's Kioxia plunged over 18% and equipment makers Tokyo Electron and Advantest each fell more than 10%. The rout followed Goldman Sachs commentary raising doubts about high-bandwidth memory (HBM) pricing sustainability, and it immediately dragged US peers Micron, AMD and Intel lower in sympathy trading.
HBM has been the single most profitable corner of the memory business through 2026, the chip category Nvidia's GPUs depend on and the one Samsung and SK Hynix have poured capital into expanding capacity for. Any crack in pricing power there reads as a leading indicator for the entire AI-infrastructure supply chain, not just a memory-sector story.
“Any crack in pricing power there reads as a leading indicator for the entire AI-infrastructure supply chain, not just a memory-sector story.”
The timing compounds an already jittery week. Apple and Nvidia have traded places for the title of world's most valuable company multiple times in July, with Apple's relative capital discipline being rewarded by investors wary of unchecked AI capex. SpaceX stock separately whipsawed Tuesday, briefly erasing over a trillion dollars in value before partially recovering -- a reminder that AI-adjacent valuations across public markets are being repriced in real time, not just in memory chips.
The stakes get higher fast: Microsoft and Meta report earnings Wednesday, with Apple and Amazon following Thursday, and every one of those calls will be parsed for whether hyperscaler AI capex guidance still makes sense against Tuesday's memory-pricing warning. A soft HBM outlook from any of the Big Four would validate the selloff; reassurance on demand could just as quickly reverse it.
What to watch: whether Samsung or SK Hynix issue their own guidance updates ahead of scheduled earnings, how Micron's US-listed shares trade into its own next report, and whether Wednesday's and Thursday's hyperscaler earnings calm or confirm the capex-sustainability fears now bleeding into the memory supply chain.
