Korea's KOSDAQ quantum computing-related stocks reversed sharply on April 17, 2026, with Woori-ro plunging -23.24% and Dream Security falling -15.80% — just two trading days after hitting the daily limit-up (+30%) on the back of NVIDIA's Ising AI model release.
What happened
NVIDIA unveiled Ising on April 14 (World Quantum Day), an open-source AI model designed to accelerate quantum hardware calibration and error correction — not a quantum computer itself. IonQ surged +18%, D-Wave climbed +15%, and the rally spilled into Korean theme stocks on April 15~16.
Why it reversed
The reversal wasn't a collapse of the theme. It was a textbook profit-taking cycle. The key evidence: ICT-K (456010) gained +29.98% on the same day others fell, indicating rotating sector money, not broad sector selling. No negative catalysts were confirmed.
Korea vs. US divergence
US quantum stocks like IonQ held gains for three consecutive days because they have actual revenue (DARPA contracts, growing quarterly sales). Korean plays — mostly PQC encryption software and hardware component companies — have weaker direct connections to Ising technology.
What to watch next
- Dream Security's KISA PQC pilot contract disclosure
- Whether US quantum stock momentum sustains beyond one week
- Profit-taking completion on remaining KOSDAQ quantum names
For the full analysis in Korean, visit Snakestock
