US Stocks | IBM posts steepest daily drop since 2000 after Anthropic says AI can modernize COBOL

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 ...