Shares of IBM tumbled 3.2% to $247.58 on April 22, defying a broader market rally, after investors grew alarmed that advancing AI coding tools — particularly Anthropic's Claude Code — could rapidly automate the modernization of COBOL, the decades-old programming language that underpins banking, insurance, and government systems worldwide. The sell-off raises a pointed question: how much of IBM's high-margin consulting revenue depends on a problem AI may soon solve faster and cheaper? IBM Shares Slide 3.2% as AI Coding Tools Circle Big Blue's Most Profitable Consulting Work — Can the Company Pivot Fast Enough?
Shares slipped to $247.58, down 3.2% against a rising market, as Wall Street continues to reprice the risk that AI tools can automate the lucrative legacy-software work that feeds IBM's consulting machine. IBM reports first-quarter results Wednesday after the close, with analysts expecting $1.81 per share on revenue of $15.6 billion. The stakes are high: management must convince investors that disruption fears are overblown while proving its own AI pivot is on track.
A Single Blog Post Wiped Out $30 Billion in Market Value
On February 23, Anthropic published a blog post about using its AI coding assistant to modernize COBOL — the 67-year-old programming language behind most banking and government systems. IBM's stock dropped 13% that day, its worst single-session loss since October 2000, putting it on pace for a 27% February decline, the worst monthly slide since at least 1968.
Anthropic claimed AI can automate the analysis work that once required armies of consultants spending years — compressing modernization timelines from years to quarters. The sell-off dragged down Accenture and Cognizant, too.
The Real Threat: A $21 Billion Consulting Segment Already Slowing
IBM's consulting arm generates roughly a third of total revenue , and it was already decelerating — growing just 3% year-over-year to $5.3 billion in Q3 2025, the weakest of IBM's three segments.
If enterprise clients start routing code-modernization work to AI tools rather than IBM's consulting teams, the revenue impact compounds quickly across a $5-billion-per-quarter segment.
IBM Says Translating Code Isn't the Same as Modernizing Systems
IBM SVP Rob Thomas countered that translating COBOL isn't modernizing enterprise systems — the value comes from decades of tight coupling between IBM's hardware and software, not the language itself.
Experts agree: real modernization requires business scoping, data migration, regulatory compliance, and organizational change — no playbook eliminates that complexity. Still, perception moves stock prices.
Earnings Wednesday Will Test Whether the Pivot Is Real
IBM completed its $11 billion acquisition of data-streaming company Confluent on March 17 , and CEO Arvind Krishna has said generative AI now represents over a third of consulting bookings.
Analysts want software revenue guidance above 10% growth to prove Big Blue can outrun the disruption narrative. Until then, every AI headline is a headwind.