FX is adding to its collection of No.1 box-office hits with the acquisition of Sony’s The Social Network and 20th Century Fox’s Wall Street: Money Never Sleeps. FX has been the most aggressive movie buyer all summer, picking up the rights to most tentpole movies. The list includes Grown Ups, Karate Kid, Iron Man 2Shrek Forever After, How To Train Your Dragon and The Twilight Saga: Eclipse.