IBM Suffers Steepest Stock Drop in 25 Years Amid Anthropic AI Coding Claims
Shares in International Business Machines (IBM) recorded their most severe daily decline in over a quarter of a century on Monday, following an announcement from artificial intelligence startup Anthropic regarding its Claude Code tool. The technology giant's stock plummeted by 13.2 per cent, marking its most significant single-day drop since October 18, 2000. This dramatic downturn stems directly from market concerns over the future of COBOL, a legacy programming language extensively utilised on IBM mainframe systems across critical sectors including banking, insurance, and government operations.
Anthropic's AI Tool Threatens Legacy Systems
Anthropic revealed in a blog post on Monday that its Claude Code artificial intelligence tool possesses the capability to automate the exploration and analysis phases crucial for modernizing COBOL codebases. "Modernizing a COBOL system once required armies of consultants spending years mapping workflows," the company stated. "Tools like Claude Code can automate the exploration and analysis phases that consume most of the effort in COBOL modernization." The startup further claimed that with AI assistance, development teams could potentially modernize their COBOL systems in quarters instead of years, a prospect that rattled investor confidence in IBM's core infrastructure business.
Broader Market Impact and Sector-Wide Concerns
The announcement triggered a wider sell-off in technology and software stocks, which have faced increasing pressure in recent months due to market anxieties surrounding the disruptive capabilities of advanced AI tools. Shares of prominent cybersecurity firms, including CrowdStrike and Datadog, also experienced notable declines on Monday as investors assessed the potential implications of Anthropic's new security-focused AI offerings on the broader industry landscape. This event underscores the growing market sensitivity to AI-driven innovations that threaten established technological paradigms and business models.
Geopolitical Tensions and Pentagon Scrutiny
Concurrently, Anthropic finds itself embroiled in high-stakes discussions with the United States Department of Defense. According to an Axios report citing sources, U.S. Defense Secretary Pete Hegseth has summoned Anthropic CEO Dario Amodei to the Pentagon for what are anticipated to be challenging negotiations concerning the military application of the company's Claude artificial intelligence tool. Reuters had previously reported exclusively that the Pentagon is actively pressuring major AI companies, including OpenAI and Anthropic, to make their AI tools accessible on classified networks with fewer standard usage restrictions.
Axios further reported this month that the Pentagon had contemplated severing ties with Anthropic over the company's insistence on maintaining strict controls over how the U.S. military employs its AI models. Defense officials indicated that the ongoing talks with Anthropic are perilously close to collapse, with a senior official emphasizing that the upcoming meeting is not a casual introductory session. An Anthropic spokesperson, however, maintained that "we are having productive conversations, in good faith." Reuters noted it could not immediately verify these reports, and requests for comment from the Pentagon, White House, and Anthropic were not immediately returned.
This confluence of technological disruption and geopolitical friction illustrates the complex, high-stakes environment surrounding artificial intelligence development, where corporate announcements can trigger immediate financial repercussions for industry titans like IBM while simultaneously drawing intense governmental scrutiny.



