IBM shares collapsed 23% in Tuesday trading, marking the company's most severe single-day drop since 1987.

The sell-off was triggered by a preliminary profit warning for the second quarter, which revealed adjusted earnings per share of $2.93, falling short of analyst consensus.

The stock had already fallen more than 17% in premarket trading after the company disclosed the disappointing results.

The sharp decline reflects deep investor disappointment as the technology giant struggles to meet growth expectations amid shifting market dynamics.

The stock had already fallen more than 17% in premarket trading after the company disclosed the disappointing results.

The magnitude of the drop underscores the market's sensitivity to execution risks in the legacy tech sector, particularly when guidance fails to align with the premium valuation often assigned to enterprise software and hybrid cloud leaders.

Investors are now reassessing the sustainability of IBM's earnings trajectory and its ability to capitalize on artificial intelligence and cloud infrastructure trends.