ToplineThe Dow Jones Industrial Average faltered Thursday thanks in large part to a massive selloff for software giant Salesforce, as rosy artificial intelligence dreams have proven unable to support the blue chip stock index’s record highs.Salesforce stock cratered Thursday.Getty Images Key FactsThe Dow fell 1%, or 380 points, to its lowest intraday level since May 2, despite 21 of its 30 member stocks gaining, with the headline losses owing to the 20% crash for Salesforce shares by 10 a.m. ET. Salesforce ...