This article first appeared on GuruFocus.

Quantum computing stocks tumbled Thursday as investors moved to the sidelines amid a broader tech selloff.

Risk-off trading hit long-duration growth names, with speculative quantum plays such as IonQ (NYSE:IONQ) and Rigetti (NASDAQ:RGTI) among those under pressure, while larger technology firms including Alphabet (NASDAQ:GOOGL), Microsoft (NASDAQ:MSFT) and Amazon (NASDAQ:AMZN) also cooled investor enthusiasm.

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The pullback reflected renewed concerns about stretched valuations across software, semiconductors and emerging tech, prompting some funds to reduce exposure to high-volatility positions. Traders cited a reassessment of timelines for commercial quantum applications and a flight to areas of the market seen as nearer-term revenue generators.

Market breadth weakened as buyers paused for clearer signals on earnings and macro data, with lower volumes. The rotation favored defensive and cyclically oriented names after recent gains.

Analysts warned that the quantum sector remains highly sensitive to sentiment and capital flows. For patient investors, the correction could present selective entry points, but for momentum traders the environment remains risky until clearer commercialization milestones translate into predictable revenue streams.