Samsung Q2 profit jumps 19-fold on AI chip surge, but shares tumble 9% on valuation fears

Samsung Electronics reported second-quarter operating profit of 89.4 trillion won ($58.4 billion)—a 19-fold surge from a year earlier—yet shares fell 9% on the news, with SK Hynix slipping 14.6%. The selloff wiped billions in market value for Asia's memory giants despite the blockbuster AI-driven earnings. South Korea's Kospi index dropped nearly 8%, triggering emergency trading halts, as global chip stocks followed suit: Micron and Western Digital fell 5%+, ASML slid 5%, and U.S. names like AMD and Intel each dropped ~4%.

The paradox reflects profit-taking after a torrid rally. Both Samsung and SK Hynix have more than doubled in value year-to-date, and with lofty earnings already priced in, investors are demanding proof that unprecedented AI infrastructure spending will sustain. Memory fundamentals remain intact (server DRAM pricing outperforming on strong CPU demand), but analysts note that memory stocks historically peak months before memory prices hit cyclical peaks—raising questions about whether the AI capex boom can justify further multiples.

For practitioners, this is a structural revaluation of the AI infrastructure cycle. While memory demand from datacenters remains resilient, the market is now interrogating sustainable profit margins as AI competition and efficiency gains threaten pricing power. Institutions are eyeing the pullback as a buying opportunity, but the volatility signals that consensus on datacenter capex durability is fragile.