
A 70-year-old programming language runs nearly every ATM in America. On Monday, investors decided that's now a problem for IBM.
IBM shares crashed 13.2% after AI startup Anthropic said its Claude Code tool could speed up modernisation of COBOL systems. The stock closed at $223.35 (£165.21),wiping roughly $31 billion (£22.9 billion) off the company's market value. It marked IBM's worst single-day drop since October 2000.