Saudi Aramco will announce share prices for its IPO on December 5, with bookrunners recommending the oil giant go with 8.50 U.S. dollars per share. This means a market valuation of 1.7 trillion U.S. dollars, setting up Saudi Aramco to be the world's most valuable listed firm. If the deal is priced at the top, the IPO will exceed Alibaba's 25-billion-U.S.-dollar listing in 2014.