Alphabet shares plunge toward their worst day ever as investors question the strength of its core search business and massive AI spending plans. Plus, Wall Street reacts to earnings from Microsoft and ServiceNow. Then Ares Management CEO Michael Arougheti joins Squawk on the Street in a CNBC exclusive after the firm beats earnings expectations. And DoorDash announces a $17 billion acquisition of Instacart, raising questions about a potential antitrust battle.Squawk on the Street Disclaimer