> "The value of the stock is relative to the performance of the company"

That's true if companies are evaluated on their fundamentals.

If you start to deal with stocks as if they were meme coins, with no concern of cash flows or business models or profitability, and you add a decade of quantitative easing, then you get stocks like Tesla, and a stock market that's driven by the need to park free cash no matter how risky and absurd the investment is.