IBM or International Business Machines Corp had its worst day on stock market in more than 25 years on Monday, February 23.

IBM shares rebound 5% after AI fears fade, as analysts defend its mainframe strength and downplay risks from Anthropic’s ...

On 23 Feb 2026, IBM shares dropped 13%, losing nearly $30B, after Anthropic's Claude AI promised faster COBOL modernization, ...

IBM shares suffered their worst single-day drop in over 25 years on Monday, February 23 after AI startup Anthropic announced ...

Anthropic unveiled new Claude functionality that can modernize COBOL code faster at scale, triggering a sharp drop in IBM ...