https://techcrunch.com/2020/09/04/stocks-are-selling-off-again-and-saas-shares-are-taking-the-biggest-lumps/

It was just days ago that cries of “stocks only go up,” and “no it makes sense that Tesla is going up because it split” and other bits of unironic stupidity were the only thing you could read online about the equities markets. Today, and yesterday, that all went to hell.

Stocks, it turns out, can go down, and they can do so very quickly. And, yes, even Tesla can endure a strong slump, giving up tens of billions of dollars in market capitalization at the same time.