Rigetti Computing (NASDAQ: RGTI) shares fell 7% to $15.73 midday Thursday as quantum computing stocks were sold across the board without any company-specific news driving the declines.
IonQ (NYSE: IONQ) slid 6% to $40.60, while D-Wave Quantum (NYSE: QBTS) dropped 4% to $18.60 and Quantum Computing Inc. (NASDAQ: QUBT) fell 4% to $8.09 in the same session.
No earnings updates, guidance revisions, analyst actions, or contract announcements were behind the moves, making the selloff a category-level event rather than a response to individual company developments.
All four companies reported Q2 FY2026 results earlier this month and have since traded primarily on broader macroeconomic signals rather than company-specific news flow.
Long-dated Treasury yields appear to be a key pressure point, with the 10-year yield sitting at 4.71% in its latest reading, near multi-decade highs that weigh heavily on long-duration growth stocks.
Unprofitable quantum computing companies sit at the extreme end of that long-duration spectrum, with valuations dependent on cash flows projected far into the future, making them particularly sensitive to elevated rates.
The four stocks entered Thursday from very different starting positions, yet all moved in the same direction, with IonQ down just 3% year to date, while Rigetti was down 23% and D-Wave down 26% through Wednesday’s close.
IonQ carried a market capitalization of $16.48 billion heading into Thursday’s session, compared to D-Wave’s $6.88 billion, illustrating that the selloff swept up stronger and weaker names alike regardless of size or prior performance.
The Defiance Quantum ETF (NASDAQ: QTUM), trading at $148.81, fell only 1% on the day and remained up 34% year to date, reflecting that pure-play quantum stocks represent a small fraction of the fund’s actual holdings.
QTUM’s relative resilience compared to individual quantum names highlights how the fund’s gains are driven largely by semiconductor, computing, and AI-adjacent holdings rather than the quantum stocks its branding implies.
With no fundamental catalyst behind the session’s losses, attention now turns to IonQ’s investor day scheduled at the New York Stock Exchange on September 8, which represents the next opportunity to refocus sentiment on company-specific fundamentals.
The correlation among quantum tickers on down days underscores the risk that holding multiple names within the sector offers far less diversification than a four-stock spread might otherwise suggest.
