National Stock Exchange's (NSE) upcoming ₹30,000-crore IPO is poised to generate massive returns for its early investors, Bloomberg reported. New India Assurance, National Insurance and Oriental Insurance could reportedly see returns of over 6,400 times. SBI is expected to earn nearly ₹5,000 crore from its stake sale, reflecting a 2,568-fold gain on shares acquired decades ago, the report added.