President Trump's announcement of new tariffs on semiconductors and pharmaceuticals kept markets in flux. Plus: Drugmaker Pfizer boosted its annual profit guidance. And, data-software company Palantir reported strong quarterly earnings and raised its yearly outlook. Charlotte Gartenberg hosts. Sign up for the WSJ's free What's News newsletter. An artificial-intelligence tool assisted in the making of this episode by creating summaries that were based on Wall Street Journal reporting and reviewed and adapted by an editor.