Quantum Stock Dreams: Over 1 Trillion Won Vanishes in a Day Despite Major M&A Announcement

IonQ Inc. (IONQ) saw its shares plunge 8.28% on the New York Stock Exchange, closing at $43.45 and driving its market capitalization down to approximately $15.3 billion (roughly ₩20 trillion). In a single day, the company lost about $1.18 billion (₩1.5 trillion) in market value, and trading volume swelled to around 20.5 million shares—well above its usual levels.

The sell-off followed IonQ’s announcement that it would acquire U.S. semiconductor foundry SkyWater Technology in an $1.8 billion (₩2.3 trillion) cash-and-stock deal. While IonQ’s stock tumbled, SkyWater’s climbed on the news. IonQ has pitched the acquisition as a step toward full vertical integration in quantum chip manufacturing—casting itself as the “NVIDIA of quantum”—but investor concerns over the hefty price tag and integration risks have fueled near-term volatility.

Headquartered in Maryland, IonQ develops ion-trap quantum computers and went public via a SPAC merger in 2021. It recently inked a contract with Korea’s KISTI to supply a 100-qubit quantum system, rapidly building references with governments and enterprises worldwide. Since its founding in 2014, the company has also acquired ID Quantique, Oxford Ionics, Capella Space and Vector Atomic, accelerating the creation of a full-stack quantum platform that spans computing, networking and sensing—an approach that investors view as a key differentiator.