IBM Share Price Plunges 13% Amid AI Threat to Mainframe Legacy Business
The IBM share price plunged 13.2% on 23 February 2026, closing at $223.35. The sharp sell-off marked the company’s steepest single-day decline since 18 October 2000. The trigger came shortly after AI startup Anthropic announced that its Claude Code platform can modernise COBOL, the legacy
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