The Big Short Squeeze
I'm not sure this is the same as a pump and dump at all. I think it's been identified (someone please say I'm wrong if this is the case) that certain Hedge Funds are hugely overexposed to their own short options, like I think I saw the number that 140% of the entire float of GME shares is in short options. That's right, there are apparently substantially more shares being shorted than actually exist!
By my limited understanding the big funds are obliged to have to buy the stocks on expiration of their options, so there's every chance that the price will continue to increase and the hedge funds loose billions more by being forced into buying at super inflated prices - which continues to drive the price further up. It's not like loosing an investment, this is like turbo-charged hyper loosing. Obviously I'd love to be sympathetic etc. A big bluff is being called by lots of people with relatively low risk individual stakes. It's hilarious.
Just to be clear - I have no financial position on GME (or anything else). I think the phrase is "we. just. love. the. stock"