For many years now, Porsche has quietly been much more of a financial/investment company than a car production company. My a multiple of many. It's been a pretty fascinating story, including Porsche hammering one of the richest guys in Europe so hard that he killed himself by throwing himself under a speeding train. Most people haven't followed much of it, but it is interesting.
Like all complex financial schemes, it usually seems to fall apart in the end.
http://radian.org/notebook/porsche