Facebook stock tumbles after announcing changes to its News Feed

Facebook shares were down more than 4% early Friday to $180.10 after the social network announced it was making major changes to its signature News Feed.
Facebook said it would begin prioritizing posts from users’ friends and families that spark the most interaction over posts from brands and publishers.
The move is aimed at improving users’ well-being on the platform, but it likely will shrink the company’s advertising business.
In a post Thursday, Facebook Chief Executive Mar