Nvidia bounce shows Wall Street's AI obsession is far from over

NEW YORK, Aug 26 : Nvidia's results on Wednesday afternoon gave its investors another roller coaster ride, highlighting just how high the expectations for AI and its favorite chip designer have gotten on Wall Street.Nvidia handily beat the consensus estimates for its second quarter and raised its third-quarter guidance. Second-quarter data center revenue rose 117 per cent from a year ago to $89 billion, and the company said third-quarter revenue across the Santa Clara, California, firm should hit $108 billion, give or take. Fans of the company saw more good news for the AI trade. But after a long run by Nvidia and the other megacap tech stocks, it wasn't quite enough – at least at first. Shares opened the after-hours session lower and were little changed in late trading in the 40 minutes f