Yum brands include KFC, Pizza Hut, Taco Bell, Long John Silvers, A&W, Pasta Bravo, Wing Street, and East Dawning. They have successfully expanded into China and appear to be targeting Europe, Russia, and India next. China has been Yum's cash cow over the past few years and continued expansion should help to increase there market share. They currently operate approximately 34,000 restaurants spread over 100 different countries.
Health conscious Americans (which make up 59% of total revenue) could impact the bottom line. The American market has been slumping lately, and it makes up over 50% of the companies profits. Competition and volatile commodity markets make profits uncertain.
Check out Wallstrip's take on YUM a few months back.