Samsung chip profit surges but stock tumbles 8% as AI demand concerns override earnings beat

Semiconductor stocks staged a sharp sell-off on Tuesday after Samsung reported record quarterly profit that surpassed both NVIDIA and Apple, yet investors dumped shares 8% on unmet AI demand expectations. The broader SOX semiconductor index fell 5%, with SK Hynix (pre-listing) down 7%, Micron and SanDisk dropping 8% and 5% respectively, and Intel, Applied Materials, and Lam Research all sliding 7–8%. AMD fell 5%.

Samsung's Device Solutions division posted ₩53.7 trillion (~$34B) in operating profit on ₩171 trillion revenue, a 19-fold year-on-year leap and record for any tech company. The company guided for operating profit to jump ₩1.8 trillion ($1.18B) in the current period. Yet guidance missed analysts' expectations for memory and HBM supply growth, raising concerns that AI capex spending cannot sustain the commodity DRAM and NAND price spikes that have powered the entire sector's rebound.

Memory chip prices have inflated sharply: commodity DRAM up ~90% in Q1 and 50–60% in Q2 as makers shift capacity to HBM. That pricing has lifted Micron and SanDisk stocks >220% and 570% YTD, respectively. But the selloff signals investor fear that memory margins are peaking—a recalibration of expectations after memory's 'historic run,' exacerbated by pre-listing volatility ahead of SK Hynix's $28B Nasdaq IPO this Friday.

The timing compounds concerns: DeepSeek (Chinese AI startup) is reportedly building its own chip to sidestep U.S. export bans, signaling geopolitical risk to semiconductor demand assumptions. Companies including Apple and Microsoft have already raised consumer product prices to offset higher memory costs, constraining downstream demand.

For architects and procurement: the reversal signals a 'demand delivery' inflection. Revenue up 19x but stock down 8% suggests the market now prices in a memory-cycle peak arriving before fab capacity comes online (earliest 2033 in South Korea). Watch near-term HBM allocation and Q3 guidance from NVIDIA, AMD, and Micron—they'll calibrate whether AI spend momentum extends through 2027.