In this segment from Tuesday's Investor Beat, Motley Fool analysts Mike Olsen and Brendan Mathews each pick one stock they've got a close eye on today. Mike looks at Zimmer Holdings (NYSE:ZMH), and why he loves the market share and barriers to entry for competitors to this knee and hip replacement company. Meanwhile, Brendan looks into Western Union (NYSE:WU) and says he'll be looking very carefully at consumer-to-consumer transaction volume when the company reports earnings Thursday. If people are continuing to use the service, he could see the stock as very cheap today.

Alison Southwick, Brendan Mathews, and  Michael Olsen, CFA, have no position in any stocks mentioned. The Motley Fool recommends Western Union and owns shares of Zimmer Holdings. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.