Ananth Narayan, who led a high-profile probe into Jane Street Group LLC as a senior official at India’s securities regulator, will hand over the investigation as his three-year term ends on Thursday.The former trader’s scheduled departure as a member of the Securities and Exchange Board of India’s board comes as the regulator faces the US proprietary trading firm in the nation’s appeal court. Narayan, the only person on SEBI’s board with a trading background, was thrust into the spotlight in July after sign ...