The following video is from Monday's Investor Beat, in which host Alison Southwick and Motley Fool analysts Lyons George and Taylor Muckerman dissect the hardest-hitting investing stories of the day. announced a new partnership with the U.S. Postal Service to provide online shoppers with Sunday delivery. In the lead story from Investor Beat, Taylor and Lyons discuss whether it's a smart move and why Amazon didn't choose UPS or FedEx.

Then the guys look at three stocks moving on Monday's market. Google is now delivering users' personal information in online ads. Carl Icahn is getting results at Transocean. And Apple rumors abound on the future of the iWatch, Apple TV, and bigger, curvier iPhones.

Finally, Lyons and Taylor explain why they're keeping a close watch on shares of MarkWest Energy and Sierra Wireless.