Nebius stock falls on debt and valuation concerns

The market’s caution appears to be centering on debt rather than demand. Nebius disclosed a credit facility in October tied to Term SOFR plus a margin that starts at 2.75% and steps up by 25 basis points every 90 days after Oct. 17, reaching 3.50% before other adjustments. In a higher-rate environment, that pricing structure matters: it raises the cost of capital just as investors are asking whether AI-related spending can be financed indefinitely without eroding returns. For a company still in an expansion phase, the combination of fast growth and rising leverage can work in the bull case, but it also magnifies execution risk if cash generation lags the pace of investment.

That tension helps explain why the stock has decoupled from the headline growth narrative. Bulls will argue Nebius is still early in a long demand cycle and that the market is overreacting to financing terms that are manageable if revenue scales fast enough. Bears will counter that debt markets are typically ahead of equity investors in pricing duration and refinancing risk, especially for companies whose valuations depend on sustaining very high growth rates.

The broader message for investors is that AI infrastructure winners are being judged not just on capacity additions and customer demand, but on the cost of funding that growth. If Nebius can convert its revenue momentum into durable operating leverage, the stock could recover quickly. If borrowing costs stay elevated or expansion requires more capital than expected, the debt market’s caution may prove more important than the company’s headline progress.