US financial markets took a sharp turn on Wednesday after inflation came in hotter than expected, dragging down US tech stocks and spilling into the crypto-linked equities most sensitive to higher rates. With borrowing costs rising and investor appetite for risk cooling, Bitcoin miners—many of which are also positioning themselves as providers of AI-related compute—were among the day’s notable decliners.
The S&P 500 fell 1.1% for its biggest one-day drop since July 29, while the Nasdaq Composite slid 1.9%, its largest decline since July 23. The Dow Jones Industrial Average dipped 0.1% over the session. In major AI and data center names, losses were pronounced, including CoreWeave (-16%), Nebius (-11%), and Oracle (-9%).
Key takeaways
- Hotter-than-expected US CPI increased pressure on tech and AI infrastructure stocks, pushing the broader S&P 500 and Nasdaq lower.
- Bitcoin mining equities extended the selloff, with multiple miners dropping more than 10% on the day.
- Higher interest-rate expectations can raise financing costs for data center expansion plans that often rely on debt.
- Fed messaging remained mixed: markets briefly priced in an October hike, but San Francisco Fed President Mary Daly said rate action is not urgent this month.
Hotter CPI weighs on growth and AI infrastructure
Wednesday’s move was tied directly to US inflation dynamics. US consumer prices rose 3.7% in September year over year, exceeding economists’ expectations of 3.6% and remaining well above the Federal Reserve’s 2% target. The CPI reading cited higher gasoline prices, with the report linking cost pressures to the Middle East war.
Higher inflation typically matters most to growth-oriented sectors—like technology and AI infrastructure—because valuation models are sensitive to the discount rate. When investors anticipate that rates may stay higher for longer, stocks that require significant future capital expenditures or long-dated earnings streams often come under pressure first.
The inflation report also pushed market expectations for an October Fed interest-rate hike higher. According to the article, the implied probability briefly moved above 50% before easing later on Wednesday.
From tech selloff to Bitcoin miners
The equity-market slump didn’t stop at traditional tech benchmarks. It quickly extended into the crypto ecosystem via publicly traded Bitcoin miners, several of which have been diversifying into AI infrastructure.
The selloff included steep one-day declines for TeraWulf (-12.64%), Core Scientific (-12.44%), Cipher Mining (-12.35%), and IREN (-12.2%). Other miners such as Riot Platforms, Bitdeer Technologies, MARA, and CleanSpark also fell, reinforcing the idea that the driver was not company-specific—rather, the shock came from the macro backdrop and its impact on rate-sensitive sectors.
Within AI infrastructure equities, the pressure was widespread. The article cited PRISM’s AI Data Center and Infrastructure Index, which tracks 23 AI infrastructure stocks; 21 of them declined on Wednesday with an average loss of 7.46%. That breadth suggests investors were reducing exposure to the sector broadly, rather than reacting to a single negative catalyst.
Why rates may hit data center expansion plans
One of the clearest channels connecting inflation to these equities is financing. The article notes that higher interest rates could increase borrowing costs for AI infrastructure companies, many of which rely heavily on debt to fund data center expansion.
That matters for traders because elevated borrowing costs can quickly change expectations for project timelines, leverage sustainability, and cost structures—especially in areas like AI compute where capital requirements can be significant. It also matters for investors evaluating longer-term strategies: even if demand for AI infrastructure remains intact, the cost of building and scaling can be affected by funding conditions.
Bitcoin miners sit at the intersection of both worlds. They are already tied to crypto market conditions, but their operational and expansion decisions are also influenced by macro variables. As seen on Wednesday, when rates moved toward a “higher for longer” narrative, miners—particularly those also marketing AI-adjacent infrastructure—were pulled into the same risk-off wave.
Fed signals: not urgent, but higher rates still likely
While the CPI report moved the market, Fed communication appeared to temper the most aggressive near-term pricing. San Francisco Federal Reserve President Mary Daly told Reuters that while additional rate hikes are likely needed to bring inflation under control, there is no urgency to act “this month.”
According to Reuters, Daly said: “I don’t feel urgent that we have to decide with a limited set of information. I think we have the time that we need.” The message is important because it suggests policymakers could be willing to wait for more data rather than rush into another increase—yet it does not remove the underlying implication that restrictive policy may persist if inflation remains above target.
That combination—hot inflation prints alongside a “not urgent” framing—can still leave markets volatile. Investors may rotate between “hike now” and “hike later” scenarios, creating swings in rate-sensitive sectors like tech and AI infrastructure, and by extension in crypto-linked equities such as miners.
Going forward, investors should watch whether inflation momentum cools in subsequent releases and how bond yields respond to Fed guidance. The key uncertainty is how quickly rate expectations normalize—if they do not, Wednesday’s broad drawdown across AI infrastructure and Bitcoin miners could be a preview of more pressure in rate-sensitive corners of both traditional markets and crypto-adjacent equities.
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