600% from what? Price discovery is broken when large market participants and market makers have access to mechanisms that enable unlimited shorting.
Current price is, in part, driven by asymmetrical risk/reward - there's a small potential loss (size of one's position in GME) and subjectively high chance of having a real stock squeeze (and having a 10/100/1000x reward) assuming that original 120%+ short interest was not closed and is still held in the form of various derivatives.
The assumption hasn't been disproved so far, partly because current regulatory environment is very lax on reporting (which makes it very hard to disprove the thesis using public data) and partly due to other indicators (like retail owning over 10% of float as of last earnings report).
Current price is, in part, driven by asymmetrical risk/reward - there's a small potential loss (size of one's position in GME) and subjectively high chance of having a real stock squeeze (and having a 10/100/1000x reward) assuming that original 120%+ short interest was not closed and is still held in the form of various derivatives.
The assumption hasn't been disproved so far, partly because current regulatory environment is very lax on reporting (which makes it very hard to disprove the thesis using public data) and partly due to other indicators (like retail owning over 10% of float as of last earnings report).