With Evergrande, I imagine some people believe it might be important enough for China that it may someday get a bailout. I don't believe it.
Institutional investors will attempt to liquidate but are largely locked in as significant sales will take the price to zero. It is the irrational retail investors who see the stock trading above zero and believe that “smart money” is accumulating shares.
https://www.investopedia.com/ask/answers/maintain-short-posi...
Agreed about irrational retail investors keeping the price of Bed Bath and Beyond and Sears above $0.
Hilariously, the creditors/BBY management saw the price and sold stock into that crowd right before bankruptcy. The prospectus literally said something like "we plan to go into bankruptcy soon and this stock will be worthless, it's just providing slightly more value for our creditors" but meme stock traders bought it anyway.
If the price rises by 120%, the market see a 120% chance of favorable outcome?
Evergrande is insolvent and is now bankrupt. There is no reasonable scenario here where the company continues to operate as a growing concern.