The Reserve Bank of India (RBI) has barred four non-banking finance companies (NBFCs), including two microfinance institutions (MFIs), from sanctioning and disbursing loans for charging exorbitant interest rates to the borrowers.These four entities are Asirvad Microfinance, Arohan Financial Services (also an MFI), DMI Finance, which provides personal, consumption, and micro, small and medium enterprises loans, and Flipkart co-founder Sachin Bansal's Navi Finserv, which offers home and personal loans.The ban will take effect on October 21 to "facilitate closure of transactions in the pipeline", the regulator said in a statement.