Rigetti Computing stock surged 9.4% this week as investors became more bullish ahead of the company's March 4 quarterly report. The gains were driven by IonQ's better-than-expected Q4 results and strong guidance, which boosted sentiment across the quantum computing sector. Rigetti now faces pressure to deliver its own performance beat to avoid falling behind in the quantum race.

Pure-play quantum computing stocks (IonQ, Rigetti, D-Wave) have fallen over 30% in 2026 but remain overvalued with extreme price-to-sales ratios and significant cash burn. The article recommends Alphabet and IBM as better quantum computing investments due to their profitable core businesses that can fund quantum R&D indefinitely, while pure-play companies face existential risk given that large-scale quantum commercialization is likely 5-20+ years away.

Quantum computing stocks surged in 2025 following Alphabet's breakthrough announcement, but analyst Justin Pope predicts the hype will cool in 2026. Despite exciting long-term potential, current quantum computers face significant technological limitations, require highly controlled environments, produce too many errors for reliable use, and lack commercial applications. Early-stage quantum companies like IonQ, D-Wave Quantum, and Rigetti Computing have minimal revenue relative to their valuations, with unclear paths to profitability. Additionally, major tech companies including IBM, Amazon, Alphabet, and Microsoft are developing competing quantum technologies, and investor sentiment toward speculative stocks has weakened.

Despite impressive trailing 12-month returns and significant long-term potential, institutional investors and hedge funds are reducing their positions in pure-play quantum computing stocks IonQ, Rigetti Computing, and D-Wave Quantum, according to latest Form 13F filings. The stocks are trading at stratospheric valuations with negative gross margins, and the sector shows signs of a potential bubble as quantum computers remain in early commercialization stages with limited real-world adoption.

Morgan Stanley analyst Joseph Moore cut IonQ's price target from $58 to $35 ahead of the company's Q4 earnings report, citing investor sentiment shifts and technical hurdles including qubit stability issues. Despite expected strong revenue growth to over $40 million and strategic wins like the SHIELD contract, concerns about long-term profitability and market preference for immediate profits over future potential weighed on the valuation.

The article highlights IonQ and Rigetti Computing as two quantum computing stocks with potential for significant long-term returns. IonQ is positioned as the safer bet with real cloud distribution and early partnerships across multiple industries, while Rigetti is a riskier play with a modular strategy combining cloud and on-premises systems. Both are volatile, capital-intensive ventures suitable only for risk-tolerant investors treating them as long-dated venture positions within diversified portfolios.

The article warns investors to sell Rigetti Computing and D-Wave Quantum, two quantum computing stocks that surged in 2025 but maintain valuations disconnected from fundamentals. Rigetti has a $5.3 billion market cap on just $7.5 million in revenue, while D-Wave is valued at $7.2 billion despite only $24.1 million in sales. Both companies are unprofitable, burning cash quarterly, and their bull case depends on achieving viable quantum computing within a reasonable timeframe—a goal the author believes is likely a decade or more away.

Microsoft has accelerated its quantum computing timeline, with corporate VP Zulfi Alam announcing confidence that by 2029, quantum machines will be deployed in data centers with commercial value, performing calculations that classical computers cannot. The company plans to integrate quantum-classical hybrid systems into data center infrastructure, marking a shift from experimental research to practical deployment.

Despite quantum computing stocks IonQ, Rigetti, and D-Wave soaring 670-6,217% over the trailing year, insiders at these companies have collectively sold approximately $615 million more shares than they've purchased. The lack of insider buying, combined with astronomical valuations and the technology's early commercialization stage, signals potential trouble ahead for these parabolic stocks.

Ark Investment Management's 2026 Big Ideas report suggests quantum computing commercialization is decades away, dampening investor enthusiasm. Rigetti Computing, despite being a quantum industry leader with improving error rates and owned fabrication facilities, faces challenges: it generated only $5.2M in revenue for a $5.3B market cap company, and its P/S ratio of 617 is unsustainable. The analyst predicts significant further downside for RGTI stock.

Rigetti Computing stock fell 15.4% this week following a TD Cowen analyst downgrade citing overly aggressive forward estimates. With only $1.9 million in Q3 revenue but a $5 billion market cap, the quantum computing stock has declined 75% from its peak as investor enthusiasm wanes and realistic timelines for profitability extend beyond 2030.

Pure-play quantum computing stocks (IonQ, Rigetti, D-Wave, Quantum Computing Inc.) have soared up to 6,200% in 2025, but face significant risks. While quantum computing offers $450-850 billion in economic value by 2040, the biggest overlooked threat is competition from cash-rich Magnificent Seven companies like Amazon, Microsoft, Alphabet, and Meta, which are already developing their own quantum processors and can easily acquire or outcompete smaller pure-play competitors.