Seven of the 10 most-valued Indian companies added a whopping Rs 1.76 trillion to their market capitalization (m-cap) last week, with HDFC Bank emerging as the biggest gainer. RIL, HUL, HDFC, ITC, Kotak Mahindra Bank and ICICI Bank were the other winners in the top-10 list, while TCS, Bharti Airtel and Infosys finished with losses for the week ended Friday.