IBM Stock Drop Deepens on AI Disruption Fears

IBM stock drop wipes $31B after Anthropic says Claude can modernize COBOL, raising fears over legacy tech dominance.

Aurelien Sage February 24, 2026 - 3:00 PM

IBM stock drop following Anthropic Claude COBOL modernization announcement

News

IBM stock drop erases $31B in market value.
Anthropic claims Claude can modernize COBOL systems.
Investors fear AI could disrupt IBM’s legacy revenue.

Shares of IBM plunged 13% in a single trading session, wiping out nearly $31 billion in market value. The sharp IBM stock drop came shortly after claims from Anthropic that its AI model, Claude, can understand and modernize legacy COBOL systems.

The announcement has sparked fresh debate about the future of traditional enterprise technology providers. IBM has long been known for its dominance in legacy infrastructure, particularly mainframes that power banks, governments, and large corporations worldwide.

But now, AI may be challenging that foundation.

AI Meets Decades-Old Code

COBOL, a programming language developed in the 1950s, still runs a significant portion of global financial systems. Many institutions rely heavily on IBM mainframes to keep these systems operating.

Anthropic claims that Claude can analyze, interpret, and even help modernize old COBOL codebases. If proven effective at scale, this could reduce the need for expensive manual upgrades and specialized consultants — a business area where IBM generates substantial revenue.

Investors appear concerned that advanced AI tools could lower the barriers to modernizing legacy systems. That would potentially weaken IBM’s competitive advantage in maintaining and servicing aging infrastructure.

The timing amplified the market reaction. AI competition is intensifying rapidly, and companies perceived as vulnerable to disruption are facing swift sell-offs.

🚨 UPDATE: IBM drops 13% losing $31B in value as Anthropic claims Claude can read and modernize legacy COBOL code. pic.twitter.com/TNqUfR0aSx
— Cointelegraph (@Cointelegraph) February 24, 2026

Market Reaction and Bigger Implications

While IBM continues to invest heavily in hybrid cloud and AI initiatives, including its own AI platforms, the IBM stock drop reflects broader anxiety in the market.

Investors are increasingly sensitive to how generative AI could reshape enterprise software. If AI models like Claude can automate complex modernization tasks, traditional IT service providers may face pricing pressure.

However, some analysts argue the reaction may be overdone. Large enterprises still require trusted partners for security, compliance, and system integration — areas where IBM maintains strong relationships.

For now, the sell-off highlights a simple reality: in the AI era, even long-established tech giants are not immune to disruption narratives.

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