The Tesla CEO’s tweet late Tuesday about the viral YouTube song “Baby Shark” has boosted the stock of Samsung Publishing, a major shareholder in the tune’s producer, SmartStudy.”Baby Shark crushes all! More views than humans,” Musk wrote, referring to the catchy children’s song, which became the most viewed video ever on YouTube in November. Soon after that tweet, Samsung Publishing’s stock surged as much as 10% to 49,000 won ($44) in South Korea. It lost some of those gains later,