Competition over the biggest IPO in history is heating up

Saudi Aramco's plans for an initial public offering have stalled because of uncertainty about where to list its shares. 
One top Saudi regulator told Business Insider the country's domestic bourse is "more aggressively" vying to be the sole listing venue. 
 
The crown jewel of Saudi Arabia - energy company Saudi Aramco, which may be valued at as much as $2 trillion - is eyeing the public markets, but a big question has stalled its plans: Where will it list its shares?
Some of the