In 2012, Bill Ackman shorted Herbalife stock with $1 billion, believing it would go bankrupt, while Carl Icahn bought large amounts, expecting it to survive.
"one of the most famous short squeezes happened back in 2012 there was an investor he's a billionaire his name is Bill Amman he thought that Herbal Life was going to go bankrupt he said that it is a MLM scream and it is going to go bankrupt so he spent a billion dollars shorting the Herbal Life stock well then you had this other investor named Carl Ian who also is a billionaire and he saw this happening and he said you know what I don't think herbal life is going to go bankrupt so he came in and he started buying huge amounts of Herbal Life stock"