How Taiwan beat the coronavirus: CNBC After Hours

CNBC.com's MacKenzie Sigalos brings you the day's top business news headlines. On today's show, CNBC's Bob Pisani looks under the hood of the S&P 500 to explain why even though the index is in positive territory for the year, more than half of its stocks are down. Plus, CNBC.com's Christina Farr breaks down her reporting on the coronavirus response in Taiwan, where only seven people have died from Covid-19.