A sharp deterioration in earnings expectations is raising red flags for IonQ, Inc. (NYSE: IONQ), even as the majority of Wall Street analysts maintain bullish ratings on the quantum computing company.

Over the past month alone, the Zacks Consensus Estimate for IonQ’s current-year earnings has collapsed by 40.3%, settling at a projected loss of $1.26 per share.

That steep downward revision has pushed IonQ to a Zacks Rank #4 (Sell), a quantitative signal that historically has been a reliable indicator of near-term price weakness.

The divergence between analyst sentiment and earnings momentum is striking, with 10 of 14 brokerages currently rating the stock a Strong Buy and one additional firm issuing a Buy recommendation.

Strong Buy calls account for 71.4% of all brokerage recommendations on IonQ, with Buy ratings adding another 7.1%, producing an Average Brokerage Recommendation of 1.50 on a scale of 1 to 5.

A score of 1.50 places IonQ firmly between Strong Buy and Buy territory, suggesting near-unanimous confidence among the sell-side community.

However, research consistently shows that brokerage recommendations carry an inherent positive bias, with firms issuing roughly five Strong Buy ratings for every single Strong Sell across the stocks they cover.

That structural imbalance reflects the vested interests brokerage firms hold in companies they cover, which frequently leads analysts to publish more favorable ratings than underlying fundamentals would otherwise support.

The Zacks Rank operates on an entirely different methodology, drawing on earnings estimate revision trends rather than analyst opinion, and empirical research confirms that near-term stock price movements are strongly correlated with such revisions.

Unlike the ABR, which is calculated from broker recommendations and expressed as a decimal, the Zacks Rank is a quantitative model displayed in whole numbers and is externally audited for performance accuracy.

A critical practical distinction also separates the two measures: the ABR can lag, as individual brokerage ratings are not always updated in real time, whereas the Zacks Rank reflects the latest shifts in analyst earnings projections as they happen.

For IonQ, the combination of broad analyst agreement in cutting EPS estimates and the magnitude of the revision over just one month represents a meaningful warning signal for investors weighing a near-term position.

The bullish consensus on Wall Street may reflect longer-horizon confidence in quantum computing as a sector, but the immediate earnings picture presents a sharply different story for short-term traders and momentum-focused investors.

Given the Zacks Rank #4 designation, taking the near-unanimous Buy-equivalent brokerage sentiment for IonQ at face value, without accounting for the deteriorating earnings outlook, carries considerable risk.