In this segment of the Motley Fool Money radio show, host Chris Hill asks Motley Fool Explorer‘s Simon Erickson, Supernova and Rule Breakers‘ David Kretzmann, and Motley Fool Pro and Options‘ Jeff Fischer to tell us about the companies they have their eyes on this week, and why: HDFC Bank (NYSE: HDB), an Indian financial institution; Stamps.com (NASDAQ: STMP), an software-as-a-service provider of shipping solutions; and