> Although some short squeezes may occur naturally in the market, a scheme to manipulate the price or availability of stock in order to cause a short squeeze is illegal.
There are two Porsche companies. Porsche AG (the car company) is controlled/owned by Volkswagen AG, but there's also Porsche SE (holding company). The latter controls a 50.7% majority of voting rights of Volkswagen AG, for 31% of share ownership. The families of Porsche-Piech own 50% of Porsche SE, but 100% of the voting rights.
My understanding of securities law is that intent is 95%. If you're doing market manipulation "just to make money" (instead of, say, to buy a company? Not really sure) then it's illegal.
https://www.sec.gov/investor/pubs/regsho.htm