It wasn't just the CES 2025 buzz that rattled quantum stocks this week — a dose of cold water came from none other thanNvidia Corp's CEOJensen Huang.

Speaking at Nvidia's Analyst Day, Huang made it clear: "very useful" quantum computers are likely decades away. In fact, he pegged the most optimistic timeline for a breakthrough in 15 to 20 years, with 30 years perhaps being more realistic. The comments have sent shockwaves through the quantum computing space, where stocks had been soaring on speculation about the technology's potential.

Shares of key players likeIonQ Inc(NYSE:IONQ),Rigetti Computing...