Shares of leading firms nose-dive after Nvidia’s Jensen Huang suggests a generational wait for fully functional quantum tech. We’ve been told that the future is now, but it seems it’s not quite here yet—at least not for quantum computing.

The quantum computing rally came to an abrupt end on Wednesday following comments from Nvidia CEO Jensen Huang. During a question-and-answer session with analysts, Huang put forth a more pessimistic view of the quantum computing timeline:

Quantum computing companies have surged recently but Nvidia CEO Jensen Huang had a disappointing message for the sector.

Rigetti Computing, IonQ, and other quantum stocks plunged after Nvidia CEO Jensen Huang told Wall Street analysts that “very useful quantum computers” are likely 20 years away.

D-Wave Quantum (QBTS) and IONQ (IONQ) shares are lower after Nvidia's (NVDA) CEO said a practical use for quantum computing is decades away

Quantum computing stocks sank on Wednesday, pausing a year-long rally, after Nvidia CEO Jensen Huang said the technology's practical use was likely two decades away.

Steve Sosnick, Chief Strategist at Interactive Brokers (IBKR), spoke with Quartz for the latest installment of our “Smart Investing” video series.