IBM's stock is up 12.5% in afternoon action. That puts it on track for its largest one-day gain since it rose 13% on July 20, 2000. See more: Amid threats of DeepSeek disruption, IBM sees benefits ...
IBM stock was recently up 13%, to $259.23, midday Thursday and has risen 38% this year, signaling the market's rally around the company's artificial intelligence strategy and upbeat outlook for 2025.