The Dow closed down 86 points to start the week with the Nasdaq hitting a record high and Jim Cramer's here to help investors make sense of the day on Wall Street. Then, PerkinElmer CEO Prahlad Singh joins Cramer to break down the most recent quarter and the company's outlook going forward. Then, Cramer's taking a closer look at recent IPO KE Holdings, China's largest digital housing platform, and how the company might fare amid tensions between the U.S. and China. Plus, Cramer's exclusive with GrowGeneration CEO Darren Lampert.