Recent swings in tech stocks are reviving fears of an AI bubble ¡ª and some experts warn that if it pops, the fallout could be bigger than anything Wall Street has ever seen.

¡°There are many indications that we are in a bubble,¡± said Itay Goldstein, a finance professor at the University of Pennsylvania¡¯s Wharton School.

¡°It seems likely that there is overpricing,¡± he added.