Nvidia CEO Jensen Huang's sobering assessment of quantum computing's timeline sent the space into a tailspin last week. During a question-and-answer session with analysts, Huang suggested that useful quantum computers were likely 15 to 30 years away.

Shares of individual quantum computing stocks fell sharply Wednesday after comments by Nvidia CEO Jensen Huang.

Jensen Huang’s comments at last week’s CES about quantum computing being decades away stirred up discussion within the quantum industry.

Defiance Quantum ETF returned 60.4% over the last year through Jan. 3 -- just over double the S&P 500 Index's 28.1% return.