The Securities and Exchange Board of India (SEBI) has sent a letter to Ruchi Soya to explain why Patanjali Founder Baba Ramdev violated insider trading norms, HT reported citing sources. Earlier, a video of Ramdev urging followers to invest in Ruchi Soya stock during a yoga session on TV went viral. "I'll give you...mantra to become a crorepati," Ramdev said.