The stock market is experiencing significant declines as fears over inflated valuations, particularly in the technology sector, take hold. Major indexes like the Dow Jones, S&P 500, and Nasdaq have all slid following warnings from big bank CEOs about potential pullbacks. Palantir has emerged as a key player in this downturn, suffering a steep drop in share prices despite reporting a record quarter. The broader tech sell-off has been exacerbated by concerns surrounding the sustainability of the recent AI boom, leading to losses for notable companies including Uber and Sarepta. As Wall Street grapples with these valuation anxieties, investor sentiment remains cautious.