How do you know when you're looking at a company that could change the world? Tasha Keeney, an analyst at ARK Invest, discusses her process for analyzing disruptive innovators. Specializing in automation, robotics and 3D printing, Keeney walks through some of the challenges and opportunities in those industries. Plus, she shares how regularly iterating her process keeps it fresh. Stocks discussed include Stratasys (SSYS), TuSimple (TSP) and Tesla (TSLA). For the video version, visit investors.com/podcast.