July Inflation US – Annual

The modal 3.4% outcome represents a controlled deceleration thesis. It sits one tenth below June’s official 3.5% annual rate, while 3.3% carries substantially more weight than a repeat 3.5%. That asymmetry implies a mild disinflation bias without assuming that June’s energy-driven monthly decline will continue at the same pace.

The 3.4% peak prices only a partial carry-through from June

BLS reported that the seasonally adjusted all-items index fell 0.4% in June, led by a 5.7% energy decline. Shelter and food offset part of that move. If July energy prices remain subdued while those offsets persist, the annual rate could edge down by one tenth, matching the hierarchy’s central outcome.

The concentration is narrow: the 3.3%, 3.4%, and 3.5% contracts account for 91.5 percentage points of quoted Yes prices. With approximately $395,000 in volume, $183,000 in liquidity, and $71,600 in open interest, the ranking has meaningful participation behind it. Those figures support treating the hierarchy as an informed consensus, though they cannot verify its economic assumptions.

Core stability limits both the high tail and deeper cooling

June core CPI, excluding food and energy, was unchanged for the month and rose 2.6% over the year. That reading supplies the main argument against outcomes far above 3.5%: underlying monthly inflation would likely need to accelerate, or volatile headline components would need to reverse sharply, for July’s annual rate to climb materially.

The same data also restrain the lower tail. June’s headline annual rate remained 3.5% even after the large monthly energy decline, with shelter and food providing offsets. A fall to 3.2% or below would therefore require a broader or more persistent easing than the latest release established. This helps explain why those outcomes carry only a small share of the quoted prices.

The annual calculation makes the hidden base assumption decisive

The contract resolves from the CPI-U all-items 12-month change before seasonal adjustment. June’s negative monthly figure was seasonally adjusted, so it cannot be transferred mechanically into the July annual rate. The result depends on the July 2026 unadjusted index relative to July 2025, including the effect of the prior-year comparison rolling forward.

The pricing consequently embeds an unstated base-effect judgment: July’s new price movement and the month dropping out of the annual comparison together produce a small decline. Evidence of soft July energy and muted core prices would strengthen that judgment. A firmer monthly index could still leave the annual rate near 3.4% if the base comparison is favorable; the reverse is also possible.

The listed close creates a pre-release information deadline

BLS has scheduled the July CPI release for August 12 at 8:30 a.m. Eastern Time. Polymarket lists a close at 3:59 a.m. UTC that day, several hours before publication. If that close is enforced, the official number becomes the settlement event, while the final repricing must occur earlier from incoming July price evidence, forecast revisions, or contract-rule clarifications.

Concrete hypothetical catalysts include a sustained reversal in energy prices, evidence of renewed food inflation, or indications that shelter inflation accelerated. Signals of another weak energy month combined with subdued shelter and food would shift support toward 3.3%. Stronger readings across several components would favor 3.5% or higher within the market’s hierarchy.

An energy rebound is the clearest failure mode

The strongest counterargument is that June’s 5.7% energy decline proves temporary. A July rebound could lift headline CPI even if core inflation remains close to its 2.6% annual pace. Shelter and food firmness would amplify that effect, making 3.5% a plausible repeat and reopening the thinly priced outcomes above it.

Conversely, another broad monthly cooling would weaken the 3.4% thesis by making 3.3% more credible. The decisive evidence is the BLS-reported, unadjusted 12-month CPI-U change; monthly seasonally adjusted headlines serve only as component-level clues before settlement.

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