AI Credit Fears Spread Beyond Nvidia. Will the Nasdaq Face Another Reality Check?

A sharp decline in Nvidia shares on Monday was accompanied by a more subtle warning from the credit market, raising fresh questions about whether the AI-driven rally in US equities is entering a more challenging phase.

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Nvidia fell 4.99%, surrendering its position as the world's most valuable listed company to Apple. At the same time, the cost of insuring the chipmaker's debt jumped to a record high after reports that the company is involved in AI infrastructure financing discussions worth more than $750 billion.

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For index investors, the bigger story may not be Nvidia itself—but what the credit market is signaling about the entire AI investment cycle.

The recent surge in credit default swap (CDS) spreads is no longer limited to Nvidia. Similar moves have emerged across several AI heavyweights, including Oracle, Alphabet, Amazon and Broadcom, as investors grow increasingly concerned about the enormous borrowing required to fund data centers and next-generation AI infrastructure.

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The timing is particularly important for the Nasdaq. After years of rewarding companies for expanding AI investment, investors are beginning to ask a different question: when will that spending generate meaningful returns? Last week's earnings from Alphabet and Tesla reinforced those concerns, as rising capital expenditure and weaker free cash flow overshadowed otherwise solid operating results.

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That shift in sentiment could have broader implications for equity indices. The Nasdaq 100 has been heavily supported by a handful of mega-cap technology companies, many of which are leading the AI spending race. If investors become more cautious toward AI-related capital expenditure, the index could face increasing pressure even if corporate earnings remain resilient.

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The credit market is also sending a warning about financing conditions. Higher borrowing costs could make future AI expansion more expensive, potentially slowing investment across the sector and weighing on valuations that have been built on expectations of rapid long-term growth.

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For now, the AI story has not changed—but the market is demanding proof instead of promises. As earnings season continues, the Nasdaq's next move may depend less on headline revenue growth and more on whether Big Tech can convince investors that its unprecedented AI spending is translating into sustainable profits, rather than simply bigger balance sheets.