Hot US Inflation Triggers Sharpest Tech Selloff Since July

U.S. consumer prices climbed 3.7% in September from a year earlier, surpassing the 3.6% consensus forecast and triggering the steepest equity selloff since late July as traders recalibrated expectations for Federal Reserve policy.

The Nasdaq Composite absorbed the heaviest damage Wednesday, sliding 1.9% for its worst single session since July 23. The broader S&P 500 retreated 1.1%, matching its sharpest decline since July 29, while the Dow Jones Industrial Average held relatively steady with a marginal 0.1% drop. The divergence between the tech-heavy indexes and the blue-chip Dow underscores how capital rotated out of growth stocks into defensive positions immediately following the Bureau of Labor Statistics release.

Elevated gasoline prices tied to the ongoing Middle East conflict drove much of the inflationary surprise. Energy costs have proven stubbornly resistant to cooling, complicating the central bank’s path toward its 2% target. Before Wednesday’s data, markets had largely priced in a pause or potential rate reduction by year-end. The hotter print briefly pushed the implied probability of an October rate hike above 50% in fed funds futures trading before stabilizing later in the session.

San Francisco Fed President Mary Daly moved quickly to temper those shifting expectations. Speaking to Reuters, she acknowledged that additional tightening might ultimately be necessary but emphasized patience. “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,” Daly said.

Her comments reflect a broader debate within the Federal Open Market Committee about distinguishing temporary supply-driven price spikes from entrenched core inflation. Historically, the Fed has hesitated to tighten monetary policy solely in response to energy shocks, preferring to focus on underlying services and shelter costs that signal persistent demand pressures.

Companies financing massive capital expenditures through debt bore the immediate brunt of the repricing. Higher interest rates directly threaten the unit economics of data center expansion, an industry already operating on razor-thin margins relative to upfront construction costs. CoreWeave plummeted 16%, while AI infrastructure provider Nebius dropped 11%. Oracle fell 9%.

The damage was systemic across the sector. According to PRISM’s AI Data Center and Infrastructure Index, 21 of the 23 tracked companies finished in the red, averaging a 7.46% loss. Unlike software firms generating immediate cash flow, physical infrastructure builders rely heavily on leveraged balance sheets to secure power agreements, cooling systems, and server racks. When the cost of capital rises unexpectedly, their forward earnings estimates compress rapidly.

Bitcoin mining firms, many of which have pivoted portions of their electrical capacity toward artificial intelligence hosting over the past two years, mirrored the infrastructure rout. TeraWulf slid 12.64%. Core Scientific, Cipher Mining, and IREN posted losses of 12.44%, 12.35%, and 12.2%, respectively. Riot Platforms, Bitdeer Technologies, MARA, and CleanSpark also retreated sharply.

This convergence highlights a structural shift in the crypto mining industry. Following the April 2024 Bitcoin halving, which cut block rewards in half, operators sought higher-margin uses for their industrial-scale power connections. Leasing capacity to AI developers became a primary survival strategy. However, this pivot transformed these companies from pure-play digital asset proxies into highly leveraged technology infrastructure plays, leaving them doubly exposed to both crypto volatility and interest rate sensitivity.

Cryptocurrency markets reacted in tandem with equities. Bitcoin slipped below $82,000, pressured by the same macroeconomic headwinds punishing risk assets broadly. Digital assets typically trade as high-beta extensions of the technology sector during periods of monetary uncertainty, and Wednesday’s session reinforced that correlation.

Daly’s pushback against an immediate October hike leaves the next scheduled FOMC meeting in early November as the definitive battleground for rate policy, with upcoming employment and personal consumption expenditures data likely to dictate whether the September inflation print represents a sustained reversal or a temporary energy-driven anomaly.