The following video is from Tuesday's Investor Beat, in which host Chris Hill and Motley Fool analysts Michael Olsen and Evan Niu dissect the hardest-hitting investing stories of the day for Foolish investors.

In this segment, Michael and Evan tell investors why they're going to be watching shares of Weight Watchers International (WW -10.07%) and T-Mobile US (TMUS 0.50%) very closely this week.