Nebius Group N.V. (NASDAQ:NBIS) shares jumped over 20% Wednesday, days after Michael Burry disclosed a short position, as the AI infrastructure company said the expected payback period on its latest deals had fallen below two years. Burry disclosed short positions in Nebius at $211.77 and Oracle Corp. (NYSE:ORCL), saying the two trades felt "a bit like shooting fish in a barrel." Revenue rose 454% to $582.3 million, while adjusted EBITDA swung to $236.2 million from a $21 million loss a year earlier. Second-quarter deals generated more than $20 million in annual contract value per megawatt, versus a roughly $12 million base for 2026. Prediction Traders Aren't Betting on an AI BustPrediction-market traders aren't pricing an imminent collapse in the AI infrastructure boom.