AI stocks came back down to earth as macro bullishness faded. Shares of Dell (DELL -7.16%) fell 20% in July, according to data from S&P Global Market Intelligence. AI stocks took a beating in July, thanks to some discouraging tech headlines and mounting concern about global macroeconomic growth. Dell enjoyed several quarters of strong performance thanks to that trend, but optimism is waning for this hardware business and the industry as a whole. Dell's previous momentum dissipated as market conditions chang ...