Lead: U.S. equity benchmarks climbed on Thursday after a delayed November Consumer Price Index showed softer-than-expected inflation and chipmaker Micron Technology posted stronger-than-forecast results and guidance. The S&P 500 moved to end a four-day losing streak, the Nasdaq outperformed, and the Dow intraday swings narrowed, as investors parsed the implications for 2026 interest-rate policy. The Bureau of Labor Statistics reported headline CPI at 2.7% year-over-year and core CPI at 2.6%, both below consensus, while Micron’s upbeat outlook and revenue targets reignited AI chip enthusiasm.
Key Takeaways
- The November CPI (released Dec. 17, 2025) showed headline inflation at 2.7% year-over-year, under the 3.1% Dow Jones consensus.
- Core CPI (excluding food and energy) printed 2.6% year-over-year versus an expected 3.0%.
- Initial jobless claims for the week ended Dec. 13 fell to 224,000, down from an upwardly revised 237,000 the prior week and slightly below the 225,000 estimate.
- The S&P 500 rose about 0.8% on the session, while the Nasdaq gained roughly 1.5%; the Dow traded near flat after earlier swings.
- Micron shares jumped intraday—up more than 11% in session and rising as much as 15% in extended moves—after beating fiscal Q1 estimates and guiding to about $18.70 billion in revenue next quarter.
- Micron raised capex guidance to $20 billion (from $18 billion) and forecasted a $100 billion addressable market for high-bandwidth memory by 2028, with a projected ~40% CAGR.
- Market participants cautioned the November CPI is incomplete because the October data were missing due to the government shutdown, so economists warned the print could be noisy.
Background
The U.S. government shutdown that became the longest on record disrupted the Bureau of Labor Statistics’ normal data collection cadence in October and led to canceled releases. The November CPI became the first consumer price reading since the shutdown ended, meaning some standard month-to-month comparisons were unavailable for the BLS to publish. That disruption amplified market attention on the headline and core annual rates when they arrived on Dec. 17, 2025.
Over 2025, inflation steadily moderated from higher readings earlier in the year, prompting debate among Fed watchers about how close policy makers are to declaring victory. Investors have been sensitive to inflation surprises because the Federal Reserve’s path for interest rates remains the dominant driver of equity valuations, particularly for growth and AI-related technology stocks. The tech sector had recently experienced profit-taking after a sharp run-up, leaving leadership status for AI names under scrutiny.
Main Event
Markets opened higher after the BLS reported an annual headline CPI of 2.7% for November and a core annual rate of 2.6%, both below economists’ median forecasts. Stocks extended gains after the Labor Department said initial jobless claims dropped to 224,000 for the week ending Dec. 13, a sign of continued labor-market resilience that complicated the inflation narrative. The S&P 500 snapped a four-day slide, the Nasdaq outperformed, and the Dow’s earlier 480-point intraday advance faded toward a flat close.
Micron emerged as the session’s standout. The memory-chip maker posted fiscal first-quarter results above Wall Street expectations on both revenue and EPS, then provided a current-quarter revenue guide near $18.70 billion—well above the $14.20 billion analysts had forecast. Management highlighted strong demand from data centers and AI workloads, prompting the company to increase capital spending plans to support production and capacity.
The Micron news reignited demand for AI-related hardware names. Major technology bellwethers—including Nvidia, Alphabet, Amazon, AMD, Meta and Microsoft—logged gains, while Tesla also climbed. Oracle, which had been pressured after investor concerns about a data-center finance plan, recovered some losses during the session. The combination of lighter-than-expected inflation and clear signs of durable AI-driven chip demand shifted investor focus back toward cyclical and growth exposures.
Analysis & Implications
At face value, a 2.7% headline CPI and 2.6% core reading ease near-term fears of a renewed inflation surge and raise the probability that the Federal Reserve will be less aggressive on additional hikes in 2026. However, economists have emphasized this report’s limitations: missing October month-to-month comparisons make trend analysis harder and increase the risk of noisy signals. Policymakers typically prefer multi-month confirmation before changing the policy outlook.
For equity markets, the print creates a two-way dynamic. Cooler inflation supports higher equity multiples and reduces the chance of further deep rate hikes, but persistent labor-market strength—illustrated by low jobless claims—keeps the Fed’s optionality alive. That ambivalence explains why the market moved decisively only in names with clear fundamental triggers: Micron and other AI supply-chain beneficiaries.
Micron’s strong guide and raised capex imply a substantial near-term increase in memory demand tied to AI infrastructure buildouts. If Micron’s view proves accurate, semiconductor suppliers and data-center operators could see multi-year revenue tailwinds, while firms unable to secure capacity may lag. The sizable increase in Micron’s capex also underscores potential semiconductor-sector capital intensity and the uneven distribution of gains across OEMs and equipment suppliers.
Comparison & Data
| Metric | Nov 2025 | Dow Jones/Consensus | Prior/Notes |
|---|---|---|---|
| Headline CPI (y/y) | 2.7% | 3.1% | September most recent prior published: 3.0% |
| Core CPI (y/y) | 2.6% | 3.0% | September core: 3.0% |
| Initial jobless claims (week end Dec. 13) | 224,000 | 225,000 est. | Prior revised: 237,000 |
| Micron revenue guide (next qtr) | $18.70B | $14.20B (LSEG consensus) | Capex guidance: $20B (from $18B) |
The table highlights why markets reacted: inflation came in below consensus while Micron materially outpaced revenue expectations. Still, analysts caution that the absence of October month-to-month inputs makes direct comparisons to normal CPI releases imperfect, and December data will be watched for confirmation.
Reactions & Quotes
Market strategists and technicians offered mixed takes, balancing relief about lower inflation with skepticism over data quality and the durability of tech leadership.
“It does seem that the inflation came down a little bit quicker than you might have thought, so the December data may roll it back a little bit,”
Chris O’Keefe, Logan Capital Management (portfolio manager)
O’Keefe suggested investors are adjusting expectations about a persistent 2% inflation target and that incoming December figures could re-shape the narrative. His remarks reflect a broader investor view that single prints should be contextualized within multi-month trends.
“Breaking that would confirm a shift in leadership out of this theme as we head into ’26,”
Jonathan Krinsky, BTIG (chief market technician)
Krinsky warned that technical measures were beginning to show signs of weakening in AI leadership, echoing concerns that recent profit-taking could presage a broader rotation if data or earnings disappointments continue.
“We are more than sold out. We have a significant amount of unmet demand in our models,”
Sumit Sadana, Micron Technology (business chief)
Micron’s management framed the company’s outlook around tight supply and strong demand from data-center and AI customers, which underpinned the aggressive revenue guide and higher capital spending assumptions.
Unconfirmed
- Whether November’s softer CPI truly signals a sustained return to sub-3% inflation; many economists say the trend will only be clear after December’s report.
- The longer-term persistence of Micron’s demand outlook — management cites unmet demand, but actual shipment and customer-deployment data over the next 12–18 months will determine whether guidance is met.
- Any immediate shift in Federal Reserve policy plans based solely on the November CPI — Fed decisions typically rely on a broader set of indicators and multi-month confirmation.
Bottom Line
Thursday’s session highlighted two competing market forces: a softer-than-expected CPI print that reduced near-term inflation pressure and a company-specific earnings beat from Micron that materially brightened the outlook for AI-driven hardware demand. Together these elements encouraged a rebound in risk assets, particularly among chipmakers and large-cap tech names, but the move comes with important caveats about data quality and trend confirmation.
Investors should treat the November CPI as a potentially informative but incomplete datapoint because of the October data gap caused by the shutdown. The most prudent approach will be to watch December’s releases and confirm whether labor-market resilience and goods/services price trajectories converge toward a durable disinflationary path.
For market positioning, earnings-driven leadership (exemplified by Micron) may dictate near-term sector performance more than macro headlines alone. If Micron’s demand assumptions hold, expect continued strength in AI-related supply chains; if not, rotation pressures could re-emerge into early 2026.