Nvidia’s quarterly results exceed projections as concerns mount over AI economy 

Artificial intelligence chipmaker Nvidia on Wednesday announced another quarter of astounding quarterly growth as investors try to decipher whether technology’s latest craze is overblown hyperbole or a springboard into a new era of prosperity and productivity.

The results for the November-January period blew past the analyst projections that shape investors’ perceptions, as has been the case since Nvidia’s high-end chips emerged as AI’s best building blocks three years ago.

Nvidia’s...