Stocks open lower as investors fret about trade. Oil prices jump as OPEC shrugs off U.S. pressure to boost supply

U.S. stocks fell Monday, with technology shares leading declines amid a rise in trade tensions with China. Oil climbed and the euro rallied. All three major U.S. stock indexes declined, with the tech-heavy Nasdaq indexes bearing the brunt of losses as Amazon.com Inc. and Microsoft Corp. each fell...