Contrary to bored laymen on the internet willing to believe anything for escapism, the stock market usually reflect the outside view base probabilities (~0% in the case of LK-99 being real)
I would rather go with the large number of research groups who have scrambled to try to reproduce the results. They clearly did not estimate the probability to be 0. I don't see how any (correct, informed) predictions from the market could come about before experimental verification.
