Retail sales fall more than 16% in April. Uber and GrubHub explore a possible merger. Marriott and Under Armour tumble on disappointing earnings. Diagnostics company Quidel gets a big boost from the FDA. And DraftKings hits a new high. Motley Fool analysts Ron Gross and Jason Moser discuss those stories and weigh in on the best way to build a portfolio. Our analysts share a couple of stocks on their radar: Intellia Therapeutics and Axon Enterprise. Plus, Camping World CEO Marcus Lemonis talks about the business of RVs and shares some insights from his CNBC show, The Profit.

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