Amazon (AMZN) stock rose in extended-hours trading after its first-quarter earnings topped Wall Street estimates. CFRA Research Senior Equity Research Analyst Arun Sundaram credits the success to innovations in Amazon's e-commerce division driving improved retail margins, as well as AWS's position as a powerhouse among other cloud computing competitors. He also highlights the company's artificial intelligence initiatives, telling Julie Hyman and Josh Lipton that Amazon has a "very compelling... Read this story