Shares of publicly traded quantum computing companies jumped sharply on Monday, with the sector riding a broad wave of investor risk appetite.
According to 24/7 Wall St. and Yahoo Finance, Quantum Computing Inc. (QUBT) and D-Wave Quantum (QBTS) each climbed 12% in morning trading, while Rigetti Computing rose 9% and IonQ added 6%. By midday, D-Wave had extended its gains further — the Motley Fool reported the stock up 13.6% as of 12:20 p.m. ET.
D-Wave had a company-specific catalyst beyond the sector tailwind. According to Seeking Alpha, investment bank Mizuho raised its price target on D-Wave following the company's analyst day, sending shares higher. That kind of institutional endorsement can amplify moves that are already underway in momentum-driven corners of the market.
The broader rally is being attributed to "risk-on optimism" — Wall Street shorthand for moods when investors shift money toward speculative, high-growth assets and away from safer bets. Quantum computing stocks, which carry high potential but remain years from widespread commercial deployment, fit squarely in that category.
IonQ was separately in the spotlight for a social media controversy, according to MarketBeat, though the stock still managed a meaningful gain on the day.
Quantum computing remains one of the most speculative areas of the technology market, meaning these stocks can swing dramatically on sentiment shifts alone — which is exactly why Monday's moves matter: they illustrate how tightly this sector is tied to broader investor mood, not just scientific milestones.