Every IBM Investor Should Keep an Eye on This Number

One loosely defined number underscores the long-term business heft of Big Blue's AI business.A single number underscores how quickly IBM (IBM -0.04%) is tapping into the artificial intelligence (AI) opportunity right now.Have you heard of Big Blue's so-called book of business for generative AI contracts? Here's a primer.What is Watsonx?The Watsonx generative AI platform was unveiled in May 2023, about six months after OpenAI's big ChatGPT launch and three months after Alphabet presented its Gemini tool (née ...