Major U.S. technology stocks experienced a sharp downturn on Monday as investor sentiment soured over the massive capital expenditures being funneled into artificial intelligence. SpaceX led the decline with a 10% drop following its recent market debut and a new notes offering, while Alphabet saw its shares plummet 6%—a trend exacerbated by the high-profile departure of Nobel laureate John Jumper to rival startup Anthropic. This collective retreat has wiped hundreds of billions from the market caps of giants like Amazon, Meta, and Microsoft, as Wall Street grows increasingly impatient for tangible financial returns on these heavy AI infrastructure investments.

Despite the broader sector decline, the semiconductor industry—particularly memory chip manufacturers—bucked the trend. Micron Technology surged to record highs following a strategic partnership with Anthropic, highlighting a growing divide in the market between companies profiting from the "AI gold rush" and those struggling to justify their spending. Analysts note that investors are increasingly favoring the "pick-and-shovel" suppliers, such as Micron, SanDisk, and Western Digital, over the hyperscalers who are bearing the brunt of the costs. This shift underscores a critical turning point for the sector, as market participants look for more concrete evidence that AI initiatives will eventually bolster the bottom line.