Shares of Edelweiss Financial Services tanked over 17% in early deals today after the Reserve Bank of India (RBI) on May 29 announced supervisory actions against ECL Finance and Edelweiss Asset Reconstruction Company, citing material supervisory concerns. The banking regulator directed ECL Finance Ltd (ECL) to cease and desist, with immediate effect, from undertaking any structured transactions in respect of its wholesale exposures, other than repayment and/ or closure of accounts in its normal course of business.