NEW YORK - International Business Machines shares plunged on Feb 23, after the artificial intelligence start-up Anthropic said its Claude Code tool can help with modernising COBOL, a dated programming language that’s mainly run on IBM computers. Shares sank 13 per cent in their biggest one-day percentage loss since October 2000. With the decline, the stock is now down 27 per cent in February, on track for its biggest one-month percentage decline since at least 1968, according to data compiled by Bloomberg. “Modernizing a COBOL system once required armies of consultants spending years mapping workflows” but “tools like Claude Code...