I remember that lol.
2008:
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In the middle of the 2008 financial crisis, Volkswagen AG (OTC: VWAGY) and Porsche were involved in perhaps the most well-known short squeeze of all time. Porsche which already owned 44% of Volkswagen acquired a large number of shares in Volkswagen, an additional 31% stake. In total Porsche owned 75% of Volkswagen, and since the German state of Lower Saxony owned the remaining 20%, there were less than 6% of the float of shares available.
During the same time, hedge funds and short-sellers had borrowed 13% of the shares to short, which meant they could not cover unless Porsche or the Lower Saxony state decided to sell.
As a result, the short-sellers were forced to buy back the shares they had sold, driving the stock price from €210 to over €1,000 a share. Hedge funds are believed to have lost about $30 billion on the Volkswagen AG bet.
The Volkswagen AG short-squeeze scenario shows that even though a company may be declining, a competitor can acquire and ruin a short position's potential for profits.
It's a great example of how two companies can be intertwined and how short-sellers need to be aware of these relationships when placing their bets.