(Bloomberg) -- The operator of Saudi Arabia’s stock exchange said foreign investors’ exposure to the bourse isn’t high enough, showing that they’re missing out on returns that have beaten most emerging-market peers.Most Read from BloombergLargest Covid Vaccine Study Yet Finds Links to Health ConditionsCapital One to Buy Discover for $35 Billion in Year's Biggest Deal Amazon Deserves to Be Called Out for Swindling UsersStocks Pause Near Record as Traders Await Catalyst: Markets WrapWall Street’s