Motilal Oswal gave a 'Buy' rating to the shares of oil and gas companies including ONGC, Hindustan Petroleum (HPCL) and Gujarat Gas. The firm set a target price of ₹400 for shares of Hindustan Petroleum, adding that they can rise as much as 18%. It added ONGC and Gujarat Gas shares have an upside potential of 26% and 28% respectively.