A day after the mega Rs 22,569 crore-IPO of National Stock Exchange of India (NSE) was fully subscribed, its grey market premium (GMP) has declined over 60 per cent decline to Rs 84, according to news agency IANS.

The stock exchange's initial public offering (IPO) GMP slumped 61.46 per cent to Rs 84 by 2 pm on Saturday from  Rs 218 on September 11. Earlier, the GMP of the NSE IPO had witnessed a sharp correction, falling to Rs 221 on September 8 from Rs 310 on September 5.