KLA Corporation experienced downward price pressure, reversing gains from its post-earnings rally as renewed concerns over artificial intelligence capital expenditure sustainability and high semiconductor equipment valuations weighed on sentiment. Although the company reported fiscal first-quarter results that surpassed consensus expectations for both revenue and earnings per share alongside strong forward guidance, broader technology sector weakness and profit-taking quickly overshadowed the positive operational update.

A primary catalyst for the decline was a series of analyst target price adjustments and valuation warnings following the earnings release. Wall Street firms,…