LaCroix is struggling to keep up in a competitive seltzer market

National Beverage, the company that owns the sparkling water brand LaCroix, is reporting a second straight quarterly sales decline. It’s a common business problem: How do you stay dominant when your product is easy to copy? Plus: The latest on Boeing’s 737 Max and your crash course on Shenzhen, China, where the world’s top electric vehicle and iPhone assembly companies were born.