What is the Consumer Price Index?

The Consumer Price Index for All Urban Consumers (CPI-U) is the most widely followed measure of inflation in the United States. Published monthly by the BLS, it tracks changes in the prices paid by urban consumers for a market basket of goods and services covering approximately 93% of the US population. The basket includes categories such as housing, food, transport, energy, medical care, apparel, and recreation, with housing carrying the largest weighting at around 32%.

The BLS collects price data from tens of thousands of retail and service establishments across the country. The resulting index is expressed as the percentage change against the same month one year earlier (the year-over-year or YoY rate) and as the month-over-month (MoM) change from the previous release. Core CPI, which strips out volatile food and energy components, is watched closely by the Federal Reserve (the Fed) as a measure of underlying inflation trends.

CPI is released roughly 12 to 13 days after the reference month ends. The August 2026 release covers price changes in July 2026, giving markets a timely read on whether inflationary pressures are accelerating, stabilising, or retreating.

US CPI Release: August 12, 2026

The August 12 release will cover July 2026 price data. Consensus forecasts for the July reading are not yet available at time of publication; the most recent confirmed reading was 3.8% year-over-year for April 2026, reported by the BLS on May 12, 2026. That April figure marked the highest annual inflation rate since May 2023, driven largely by energy prices rising 17.9% on an annual basis, with gasoline up 28.4% year-over-year.

Month-over-month, consumer prices rose 0.6% in April and 0.9% in March, indicating that inflationary momentum has been building. Core CPI, excluding food and energy, rose to 2.8% year-over-year in April. The July reading will be one of two CPI prints before the Federal Open Market Committee (FOMC) meets in September 2026 and will carry significant weight for the Fed’s rate decision at that meeting.

Why This CPI Release Matters

Consumer price inflation has become a dominant macroeconomic theme in 2026. After a period of relative calm in late 2025, inflation accelerated sharply in the early months of 2026. The annual rate reached 3.3% in March and 3.8% in April, driven by an oil price shock linked to conflict in the Middle East. Gasoline prices rose 28.4% year-over-year in April, pushing total energy costs up 17.9%, the steepest annual energy price increase since September 2022.

For equities, elevated inflation raises the cost of capital and reduces the present value of future earnings, particularly for growth-oriented sectors. For bonds, higher-than-expected inflation typically pushes yields upward and prices lower. The US dollar tends to strengthen when inflation data comes in hotter than forecast, reflecting expectations of a more hawkish Federal Reserve. Commodities and inflation-linked securities often benefit from persistent price pressures.

The FOMC has maintained interest rates at elevated levels in response to the inflation resurgence. The July CPI print, along with the June report due on July 14, will shape the Fed’s thinking heading into the September 2026 meeting. A sustained retreat in inflation would open the door to rate cuts; a continued acceleration would press the Fed to hold or tighten further.

What to Watch For

Beyond the headline year-over-year figure, analysts and traders will examine several components closely:

• Above consensus: A reading above the prevailing trend (above approximately 3.5-4.0%) would reinforce the case for the Fed to hold rates higher for longer, likely strengthening the US dollar, pushing Treasury yields higher, and pressuring equity valuations. Energy-sensitive names and rate-sensitive sectors such as utilities and real estate would face the most pressure.
• In line with consensus: A reading broadly matching market expectations would be largely absorbed without a significant market reaction. Attention would shift to the underlying detail: whether shelter costs are moderating, whether core services inflation is cooling, and whether energy remains the primary driver.
• Below consensus: A softer-than-expected print would boost sentiment across equities and bonds by raising the prospect of Fed rate cuts. The US dollar would likely weaken, while interest-rate-sensitive sectors would rally. A reading below 3.0% would be particularly meaningful given the recent trend.

Shelter costs and services inflation deserve particular attention. Shelter (primarily owners’ equivalent rent) is the single largest CPI component. Core services ex-shelter, often called “supercore,” is the metric the Fed watches most closely as an indicator of demand-driven inflation. Any meaningful deceleration in this component would be a strong signal that underlying inflation is genuinely cooling.

Historical Context

Source: US Bureau of Labor Statistics. October and November 2025 data were not published due to the US government shutdown. MoM and core figures not available for all periods shown.

Market Positioning

Heading into the second half of 2026, markets are calibrating inflation expectations against Federal Reserve communications. Fed funds futures have reflected uncertainty about the path of interest rates, with traders reluctant to price in cuts while inflation remains elevated above the Fed’s 2% target. Treasury yields have risen over the course of 2026 as successive CPI prints have exceeded expectations, reflecting a reassessment of how long restrictive monetary policy may remain in place.

In equity markets, value and defensive sectors have generally outperformed growth names in this environment. The US dollar has strengthened against major currencies on the back of higher real yields. Gold, typically a beneficiary of elevated inflation expectations, has also performed well as investors seek stores of value amid persistent price pressures.

Related Events

• US CPI Report July 2026 – The preceding monthly CPI release, covering June 2026 price data, providing essential trend context for the August reading.
• FOMC Rate Decision September 2026 – The Federal Reserve’s next policy meeting, for which the August CPI will be a primary input.
• US Employment Situation (NFP) July 2026 – The labour market report for June 2026, completing the Fed’s dual-mandate picture alongside the inflation data.

Frequently Asked Questions

What does the CPI measure?

The CPI measures the average change in prices paid by urban consumers for a fixed basket of goods and services, including housing, food, transport, energy, and medical care. It is the most widely followed measure of consumer price inflation in the United States, published monthly by the Bureau of Labor Statistics.

When is the August 2026 CPI report released?

The August 2026 CPI report will be released on Wednesday, August 12, 2026, at 8:30 a.m. Eastern Time. The report covers price changes during July 2026.

How does CPI data affect interest rate decisions?

The Federal Reserve uses CPI data as a key input for monetary policy. When inflation is running persistently above the Fed’s 2% target, the central bank typically holds or raises interest rates to cool demand. A sustained decline in CPI towards target would increase the likelihood of rate cuts, which would affect borrowing costs across the economy including mortgages, corporate loans, and credit cards.