Absolutely fascinating read:
http://radian.org/notebook/porsche
"Porsche’s ownership disclosure sent the hedge funds on such a flurry of purchases for any Volkswagen stock still in circulation that the VW share price jumped from below €200 to over €1000 at one point on October 28th, making Volkswagen for a brief time the world’s most valuable company by market cap.
On paper, Porsche made between €30-40 billion in the affair. Once all is said and done, the actual profit is closer to some €6-12 billion. To put those numbers in perspective, Porsche’s revenue for the whole year of 2006 was a bit over €7 billion."