U.S. inflation data for late 2025 has been unusually shaped by a rare and disruptive event: the longest federal government shutdown on record. The 43-day shutdown interrupted the Bureau of Labor Statistics’ (BLS) normal price collection process, forcing it to rely on statistical imputation methods particularly for rents and housing-related components to compile the November Consumer Price Index (CPI). These technical adjustments, combined with heavy holiday discounting, temporarily restrained reported inflation. As normal data collection resumed in December, economists widely expect these distortions to unwind, revealing a truer and firmer picture of price pressures in the U.S. economy.
Why Inflation Likely Rebounded in December
The expected acceleration in December CPI reflects a statistical “payback” rather than a sudden inflationary shock. During the shutdown, October prices were carried forward as unchanged, muting measured inflation in November, especially in rents and goods. December data, by contrast, captures a more complete set of prices collected under normal conditions. Economists anticipate this normalization to push headline CPI higher, with particular strength in goods categories such as vehicles, furniture, and apparel, where holiday discounting had previously suppressed prices. Food and energy prices especially electricity, driven by rising demand from data centers are also expected to contribute to the increase.
Housing and the Lagged Nature of Rent Inflation
Despite the expected rebound, housing-related inflation is unlikely to show its full effect immediately. The BLS calculates rent and owners’ equivalent rent using a six-month panel methodology, meaning distortions introduced during the shutdown will not fully wash out until April 2026. As a result, December’s CPI may still understate underlying housing inflation, even as other components accelerate. This lag creates a temporary disconnect between actual cost pressures faced by households and what is reflected in official inflation data, complicating both market expectations and policy interpretation.
Goods, Services, and Tariff Pass-Through
Beyond shutdown-related effects, economists also point to a gradual pass-through of President Donald Trump’s sweeping tariffs into consumer prices. While many firms initially absorbed higher import costs, margins are becoming harder to defend. Goods inflation is therefore expected to rebound more sharply than services, particularly as discounting fades. Services inflation, however, is also likely to pick up modestly in seasonally sensitive areas such as airfares and lodging. Together, these trends suggest inflation pressures are broadening rather than narrowing.
Federal Reserve Policy Context
The inflation outlook reinforces expectations that the Federal Reserve will keep interest rates unchanged at its January meeting. Core CPI is forecast to rise both month-on-month and year-on-year, remaining well above the Fed’s 2% target when measured by its preferred Personal Consumption Expenditures (PCE) index. Compounding the policy challenge are escalating political tensions between the White House and the Fed, including a criminal investigation into Chair Jerome Powell, which most economists view as unlikely to prompt near-term rate cuts and potentially damaging to institutional credibility.
Implications
A firmer CPI print would solidify a “higher for longer” interest rate environment, weighing on rate-sensitive sectors such as housing and credit. Politically, renewed inflation momentum threatens to further erode President Trump’s approval ratings ahead of the 2026 congressional elections, keeping cost-of-living concerns at the center of public debate. For markets, the data may reinforce volatility as investors reassess the timing and likelihood of monetary easing amid policy uncertainty and political pressure on the central bank.
Analysis
The anticipated rebound in December inflation highlights how fragile inflation narratives can be when distorted by temporary statistical and political disruptions. While the shutdown-related effects may fade over time, they obscure a more structural reality: inflation in the U.S. remains sticky, supported by tariffs, resilient consumer demand, and delayed housing adjustments. More troubling is the growing politicisation of monetary policy. Efforts to pressure or undermine the Federal Reserve risk anchoring inflation expectations higher, not lower. In this context, December’s CPI is less about a single data point and more about revealing how unresolved policy tensions fiscal, trade, and institutional continue to shape the inflation outlook in ways that extend well beyond technical quirks in the data.
With information from Reuters.
