The Globe and Mail reports in its Thursday edition that contrarian investor Michael Burry is in a war of words with Nvidia over whether there is another financial bubble brewing, this time in artificial intelligence. The Globe's Joe Castaldo writes that Mr. Burry believes there are questionable accounting practices in the industry. Nvidia reportedly passed around a memo to Wall Street analysts this week rebutting some of Mr. Burry's assertions. On Tuesday, Mr. Burry accused Nvidia of making "straw-man" arguments and posted a copy of the memo on-line. He wrote: "This is the most valuable company in the world. I can hardly believe it came from Nvidia, but all signs are it did." The Globe says Nvidia did not immediately reply to a request for comment. Mr. Burry disclosed in his recent post that he is betting against Nvidia through put options. The hype around AI, along with a number of what are known as circular financing deals among AI companies, has drawn comparisons with the dot-com bubble more than two decades ago. AI-related stocks have taken a hit in the past month as concerns have grown. Nvidia shares are down 14 per cent from a high in late October. Mr. Burry believes the "AI ecosystem is on shaky ground."