IBM Stock has worst day

IBM stock plunged 24% in premarket trading on July 14, 2026, on pace for its worst day in the company's 115-year history, after CEO Arvind Krishna warned that customers rapidly shifted spending away from IBM's mainframe computers toward AI datacenter equipment like servers and memory chips. Krishna acknowledged the company underestimated how dramatically customer purchasing priorities would change and failed to adapt quickly enough, though he also cited supply chain impacts and delayed deals due to security concerns around new AI technology. IBM is set to report its quarterly earnings on July 22.