Dow Jones drops 1,400 points as US stock market leads global sell-off after Trump's tariffs spark recession fears / Trump tariffs spur big losses for S&P, Dow Jones as market worries grow / AI chipmaker Nvidia to join Dow Jones, replacing rival Intel / The Dow needs Nvidia to give chipmakers representation in index after Intel's plunge / The Dow jumps 300 points as Big Tech earnings come into focus / Dow Jones says Perplexity is "freeriding," sues over copyright infringement / Murdoch's Dow Jones sues AI start-up Perplexity for infringement / Perplexity is sued by Dow Jones and 'New York Post' for copyright infringement / Dow Jones closes at all-time high after recouping its losses from early September / Exclusive: Dow Jones creates new Leadership Institute led by Alan Murray