** India's Billionbrains Garage Ventures NSE:GROWW, parent of stockbroker Groww, surges 20% to 120.07 rupees
** Stock opens at 112 rupees on the National Stock Exchange of India, vs the issue price of 100 rupees
** BILO's $754 million IPO was fully-subscribed within hours of opening last week, led by strong demand from institutional and retail investors
** Groww made a good IPO debut, reflecting healthy investor confidence driven by strong brand recall and rapid user growth in the Indian digital investing ecosystem, says Shivani Nyati of Swastika Investmart
** Co raises $127 mln from fresh issue of shares with proceeds to be used for technology investments, brand building, and expanding its margin trading facility, the prospectus shows