New Delhi, June 22 -- The National Stock Exchange (NSE) has filed its Draft Red Herring Prospectus (DRHP) with the Securities and Exchange Board of India (SEBI) for its much-awaited initial public offering (IPO). Upon listing, NSE shares will trade on its listed rival, the Bombay Stock Exchange (BSE).

The NSE IPO is expected to be among the largest IPOs in Indian stock market history, with estimates pegging the issue size at around Rs.30,000 crore. Reports suggest the NSE IPO could be priced in the range of Rs.1,800 - Rs.2,040 per share.

At the upper end of the price band, NSE could command a valuation of more than Rs.5 lakh crore. In comparison, BSE's market capitalisation stood at over Rs.1.63 lakh crore as of June 22.

BSE share pric...