There isn't a hotter next-big-thing trend on Wall Street at the moment than artificial intelligence (AI).

AI describes the use of software and systems to oversee tasks that humans would normally handle. What makes AI so special and universally adaptive is the incorporation of machine learning (ML). With ML, AI-driven software and systems have the ability to learn and evolve over time. It's what gives AI applicability across a wide gamut of sectors and industries, and it's why PwC foresees AI adding $15.7 trillion to global gross domestic product by 2030. 

However, not everyone is a fan of artificial intelligence stocks. Based on the latest round of quarterly Form 13F filings, quite a few highly successful, prominent billionaire investors reduced or exited their positions in a handful of high-flying AI stocks.

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Source Fool.com