The Securities and Exchange Board of India (Sebi) will complete its investigation into the case pertaining to Zee Entertainment Enterprises Ltd owners Subhash Chandra and Punit Goenka within 8 months, Chairperson Madhabi Puri Buch said in a revised order. Until the investigation is complete, Subhash Chandra and Punit Goenka will not hold any directorial positions in any of the Essel Group companies, the regulator said.