IBM shares suffered a catastrophic sell-off, plunging 23% in Tuesday trading to mark the company’s most severe single-day decline since the market crash of 1987.

The collapse was triggered by a preliminary profit warning for the second quarter, which revealed that the technology giant missed its revenue expectations by $700 million.

The sharp repricing reflects deep investor disappointment as the company struggles to navigate shifting demand patterns.

CEO Arvind Krishna attributed the shortfall to an unexpected shift in customer spending, noting that clients are prioritizing hardware purchases over the software and services segments that have traditionally driven IBM’s growth narrative.

This development underscores the fragility of IBM’s transition strategy.

Despite years of restructuring aimed at boosting high-margin hybrid cloud and AI revenues, the company remains vulnerable to macroeconomic headwinds and changing client behavior.