The simultaneous eruption of AI infrastructure financing risks and a sharp spike in energy prices has dealt Wall Street a double blow this week.
The Nasdaq 100 fell 5.5% this week, its largest weekly decline since the tariff turmoil of April 2025. The semiconductor sector posted eight consecutive sessions of losses, the longest losing streak since 2008, with a cumulative drop of roughly 16%. Cloud computing provider CoreWeave became the market's focal point — yields on some of its bonds briefly surpassed 15% on Thursday, with credit risk climbing to levels that typically signal financial distress. Its shares fell another 12% on Friday alone, down more than 50% from their year-to-date high.
Meanwhile, Brent crude settled near $110 per barrel, while WTI surged 3.8% in a single day. The sharp rise in oil prices intensified inflation concerns and pushed the 10-year U.S. Treasury yield up to 5.097%, eroding the safe-haven logic of the bond market.
The key shift in the market this week is that the primary focus of the AI trade has moved from computing demand growth to financing costs, returns on capital expenditure, and corporate profitability. Two major risks — loosening valuations in the AI bubble and energy-driven inflation pressure — are being released simultaneously within the same window, exerting a coordinated drag on equities, bonds, and credit markets.
AI Debt Risk Emerges as CoreWeave Becomes the Trigger
CoreWeave's credit deterioration was the direct catalyst for this round of selling. The emerging cloud service provider has relied on large-scale borrowing to build AI data center infrastructure, and its debt-financing model came under intense market scrutiny this week. Yields on some CoreWeave bonds briefly exceeded 15% on Thursday, with the market pricing in a default probability of roughly 60%, placing its credit risk squarely in distressed territory.
Market concerns are not limited to CoreWeave alone. Mark Malek, chief investment officer at Siebert Financial, said tightening financing channels for emerging cloud service providers could become a "very unsettling hurdle" across the entire technology industry supply chain. "Now we're seeing that financing itself will become a scarce resource and will impact the supply chain," he said.
Dennis Follmer, chief investment officer at Montis Financial — which manages roughly $1.4 billion in assets — is equally wary of the debt positions of hyperscale cloud providers. "A lot of the market's concern comes from the scale of borrowing by hyperscalers — they have already consumed substantial cash flow before needing to take on debt," Follmer said. "I do think this will cause some trouble down the road."
JPMorgan strategists noted that compared with the July selloff, the current AI trade has a weaker foundation for recovery — retail buying is tepid, the pool of short positions available for a squeeze is smaller, and the support from corporate buybacks is relatively limited.
Chips and Memory Sectors Hit by Concentrated Selling
This wave of selling extended from cloud computing to the entire upstream AI supply chain. The Philadelphia Semiconductor Index posted eight consecutive sessions of declines, its longest losing streak since the 2008 global financial crisis. The memory-themed index fell 6.28% for the week. SK Hynix ADRs dropped more than 6.5% in a single day, Micron Technology fell more than 5.6%, SanDisk dropped over 6.8%, and optical communications company Coherent declined more than 7%.
An ETF tracking DRAM memory chips fell 19% this week, its largest weekly decline since its inception in April this year, and has recorded net outflows for eight consecutive weeks. South Korea's KOSPI index plunged 14% this week, its biggest weekly drop since the 2008 financial crisis, and is down more than 37% from its summer peak.
According to Bloomberg's U.S. fund manager survey for October, the proportion of respondents citing "long global semiconductors" as the most crowded trade has fallen from 82% in July to 45% — though the decline is significant, crowding still ranks first. Michael O'Rourke, chief market strategist at JonesTrading, put it bluntly:
"The market has already priced a bubble premium into AI company valuations, and that bubble is beginning to deflate."
Oil Price Spike Tears Apart Safe-Haven Logic as Bond Market Faces Dual Pressure
In energy markets, Brent crude rose to around $110 per barrel this week, the highest level since May. WTI surged 3.8% in a single day to $101.71 per barrel, marking its seventh consecutive day of gains. Bipartisan U.S. lawmakers jointly proposed legislation aimed at blocking the Trump administration's agreement with Moscow to allow Russian diesel into the market, with geopolitical factors further supporting oil prices.
The oil price rally triggered a chain reaction in the bond market. Previously, even two consecutive inflation readings above expectations failed to stop investors from flocking to Treasuries as a safe haven during stock market declines. But with the sharp rise in oil prices, inflation concerns reignited, pushing the 10-year U.S. Treasury yield to 5.097% and reversing a three-day decline, with the safe-haven properties of long-end bonds clearly eroded on Friday.
Federal Reserve Chair Warsh declined to provide any guidance on the outlook for the October rate meeting at an IMF event in Bangkok, leaving the market further lacking policy direction. Nevertheless, long-dated Treasuries, as measured by the TLT ETF, still posted one of their stronger weeks of the year overall. Follmer said his team has begun reducing duration risk, partially replacing traditional fixed-income holdings with catastrophe bonds.
Divergence Intensifies: Deleveraging and Bottom-Fishing Proceed in Parallel
Despite rising panic, the market has not seen indiscriminate risk clearing. Investment-grade credit spreads remain at the tighter end of their five-year range, and some ETF investors are choosing to buy on dips.
Cathie Wood's ARK Investment Management took the opportunity to add to its positions in CoreWeave and Cerebras Systems. Wood compared the current market anxiety over CoreWeave's borrowing costs to the earlier period when Coinbase bonds came under pressure — a time when the cryptocurrency exchange subsequently benefited from the industry's overall growth.
Keith Lerner, chief investment officer at Truist Advisory Services, also maintained an overweight position on the technology sector, believing that most of the negative information has already been reflected in share prices, with some valuations approaching the lower end of historical ranges.
The market's real test is approaching. In the coming weeks, technology giants will report earnings in succession, giving investors a chance to verify whether AI-related revenue can match continually rising capital expenditures. At the same time, the approaching U.S. midterm elections add further uncertainty to cross-asset pricing. As Mark Malek put it: "This is a stage that any industry must go through on its path to maturity."
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