Marks said while enthusiasm for AI stocks is undeniable, it hasn't yet crossed into the realm of mania that defines a true bubble.

“It seems you can’t go anywhere without talking about AI,” says Aditya Bhave, senior U.S. economist at Bank of America Research.

Some are worried that the rapid rise in the value of AI tech companies may be a bubble waiting to burst.

Marks said while enthusiasm for AI stocks is undeniable, it hasn't yet crossed into the realm of mania that defines a true bubble.