Volatile Trading Day Leaves Analysts Seeking Answers

Tech stocks weigh on U.S. indexes, with chip makers remaining a pressure point. Plus: Oil prices fall as President Trump accuses Iran of shooting down a U.S. helicopter. Alexis Green 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.