Shares of Nebius Group surged roughly 20% this week, defying investor Michael Burry’s recent claim that betting against high-flying artificial intelligence stocks was like “shooting fish in a barrel.”
The rebound came just days after Burry, the money manager made famous by his prescient wager against the housing market in “The Big Short,” publicly disparaged the sector he has been positioning against. Nebius, a cloud and AI infrastructure company, has become a focal point in the debate over whether soaring valuations across the industry are sustainable.
The move underscores the volatility gripping AI-linked equities, where sharp rallies and steep declines can unfold within days as sentiment swings between euphoria and caution.
Despite the recent bounce, Nebius has struggled over a longer horizon. The stock has posted a one-year return of roughly -42%, a figure that has fueled concern among analysts about rising credit risk and the durability of its growth story.
The contrast has drawn frequent comparisons with Oracle Corp., another company that has leaned heavily into AI infrastructure to court investors. While both firms have benefited from enthusiasm surrounding data-center demand, questions persist over how much of that optimism is already reflected in their share prices.
The tension between hype and fundamentals has become a defining feature of the current market cycle. Some observers have drawn parallels to the dotcom era, warning that a wave of capital chasing AI exposure could leave latecomers exposed if earnings fail to materialize.
Burry’s short positions have made him one of the most closely watched skeptics of the AI trade. His willingness to bet against the sector’s most richly valued names has amplified scrutiny of companies whose valuations rest heavily on future growth rather than current profitability.
For Nebius, the immediate rally offers a reprieve but does little to settle the underlying question of whether its business can support its market ambitions. Credit metrics and cash-burn rates remain under close watch as the company scales its infrastructure operations.
The broader AI trade continues to divide Wall Street between those who see a durable technological shift and those who fear a speculative bubble. Nebius, caught between a punishing 12-month decline and a sudden double-digit surge, has emerged as a vivid illustration of that divide.
Whether the latest gains mark a turning point or a temporary squeeze will likely hinge on upcoming earnings and the pace at which AI demand translates into sustainable revenue.