It comes after the U.S. stock market exchange lost $1trillion in just four days as a tech stock sell-off escalated on Wednesday.

Investors’ long-running enthusiasm for artificial intelligence showed signs of faltering on Tuesday as tech stocks tumbled.

Shock sell-off after study warns most investments in artificial intelligence get zero returns

“The crash is separating real AI revenues from companies that only have AI PowerPoints.”

The US stock market has seen $1 trillion wiped off in four days as a sell-off in tech companies deepened on Wednesday.

It comes after the U.S. stock market exchange lost $1trillion in just four days as a tech stock sell-off escalated on Wednesday.

Shares in US tech stocks are falling but it would probably be unwise for fund managers to pull out