Within minutes of the U.S. stock market opening on Monday, the S&P 500 sunk so swiftly that it triggered a 15-minute pause in trading, a rare event meant to prevent stocks from crashing. We look at why this happened and what it means for the U.S. economy.\n\n\u201cThe Latest,\u201d from the team behind \u201cThe Daily,\u201d brings you the most important developments on today\u2019s biggest news stories. You can find more information about it\xa0here.