US Stocks | IBM posts steepest daily drop since 2000 after Anthropic says AI can modernize COBOL
IBM shares plummeted over 13% on Monday, marking their worst single-day fall in over two decades. This sharp decline followed AI startup Anthropic's announcement that its new tool can significantly speed up the modernization of COBOL, a critical p...

IBM shares sank 13.2%, their biggest drop since October 18, 2000.
COBOL is a programming language widely used on IBM mainframes across banking, insurance and government systems.
"Modernizing a COBOL system once required armies of consultants spending years mapping workflows. Tools like Claude Code can automate the exploration and analysis phases that consume most of the effort in COBOL modernization," Anthropic said in a blog post on Monday.
"With AI, teams can modernize their COBOL codebase in quarters instead of years," it added.
Software stocks have been battered in recent months by market fears around the growing capabilities of AI tools, particularly following the launch of plug-ins from Anthropic's large language model Claude, seen as the startup's push to become an application layer.
Shares of cybersecurity companies including CrowdStrike and Datadog also slumped on Monday, as investors weighed the potential impact of Anthropic's new security tool on the industry.
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