Following rallies in excess of 2,000%, both of these widely owned industry leaders may be set for epic pullbacks.

Arguably, nothing has commanded the attention of professional and everyday investors quite like artificial intelligence (AI) . In Sizing the Prize , the analysts at PwC forecast AI would provide a $15.7 trillion boost to the global economy by 2030, with $6.6 trillion tied to productivity improvements, and the remainder coming from consumption-side effects.

Excitement surrounding this technology has sent some of the market's largest and widely held AI stocks soaring, including AI-data mining specialist Palantir Technologies ( PLTR -2.52% ) and electric-vehicle (EV) manufacturer Tesla ( TSLA -0.58% ) .

But just because these stocks have been (thus far) unst

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