'The Big Short' investor is now betting against Tesla: CNBC After Hours

CNBC.com's Pippa Stevens brings you the day's top business news headline. On today's show, Lora Kolodny breaks down the news that Michael Burry's regulatory filings revealed a short position against Tesla. Plus, Alex Sherman explains how the WarnerMedia merger with Discovery puts NBCUniversal and ViacomCBS on notice.