Billionaire Patrick Drahi’s Altice NV, the European telecommunications company buying Cablevision Systems Corp. in a $17.7 billion deal, is raising 1.8 billion euros ($2 billion) by selling new stock to help finance the takeover of the U.S. cable carrier. Altice, Europe’s most acquisitive cable company, agreed to buy Cablevision last month to create the fourth-largest cable provider in the U.S.