Shares of Fusion CX are set to make their stock market debut on the BSE and NSE on Thursday, amid mildly positive grey market sentiment. The IPO is commanding a grey market premium (GMP) of around 5%, indicating expectations of a modest listing gain over the issue price.Fusion CX raised Rs 702 crore through its book-built IPO, comprising a fresh issue of 1.73 crore shares worth Rs 500 crore and an offer for sale (OFS) of 69.90 lakh shares aggregating to Rs 202 crore.