Why have the big seven tech companies been hit by AI boom doubts?

Their shares have fallen 11.8% from last month’s peak but more AI breakthroughs may reassure investors

It has been tough week for the magnificent seven, the group of technology stocks that has played a dominant role in the US stock market, buoyed by investor excitement about breakthroughs in artificial intelligence. But doubts about the return on AI investment, along with a mixed set of quarterly results, investors shifting their focus to other sectors and weak US economic data have hit the group over the past month.

Via: theguardian.com