Short Answer

Both the model and the market expect CPI in August 2026 to be Above -0.1%, with no compelling evidence of mispricing.

1. Market Behavior & Drivers

This prediction market has shown a distinct upward trend, with the probability of August 2026 YoY CPI exceeding 0.1% rising from a starting point of 79% to a current price of 86%. A significant movement occurred in early May, when the price jumped from 81% to 86%. This increase in perceived probability appears to be a reaction to recent economic indicators mentioned in the provided context, specifically the March 2026 CPI data which showed a 3.3% year-over-year increase. The market seems to have integrated this information, alongside reports of increased inflation forecasts, by pricing in a higher likelihood of inflation remaining above the 0.1% threshold.
The total trading volume of 219 contracts indicates a moderate level of market participation. However, the sample data points show that the initial price appreciation occurred on zero volume, which could suggest the move was not driven by strong conviction at that moment. The price has since established a new trading range, with the initial price of 79% acting as a support level and the high of 88% serving as resistance. The current price of 86% suggests that market sentiment has solidified around a high probability of the "Yes" outcome. The sustained higher price level reflects a consensus that inflationary pressures are expected to persist, keeping the YoY CPI figure above the market's 0.1% baseline.
  • Major institutions forecast persistent elevated inflation into August 2026.
  • Geopolitical risks may pose an upside surprise for August CPI.
  • Major oil shocks and trade tensions may threaten August 2026 CPI.
  • Core inflation components suggest steady-to-cool price pressures by August 2026.
  • PCE inflation has notably outpaced CPI throughout 2026.
  • Stronger economic growth may boost demand, potentially raising August CPI.

Current Context

August 2026 CPI data will be released in September. The Bureau of Labor Statistics (BLS) is scheduled to release the Consumer Price Index (CPI) for August 2026 on September 11, 2026, at 8:30 AM ET [1][2]. Prediction markets offer insights into expectations for August 2026 year-over-year (YoY) CPI growth. On Robinhood, the probability of CPI exceeding 0.1% YoY in August 2026 is valued at 71 cents, with probabilities for exceeding 0.2% and 0.3% priced at 58 cents and 32 cents, respectively [3].
Inflation indicators show elevated trends and increased forecasts. Recent data highlights existing inflationary pressures, as the March 2026 CPI increased by 3.3% year-over-year and 0.9% month-over-month, primarily due to an energy shock stemming from the Iran conflict [4]. The Cleveland Fed's nowcasts for May 2026 CPI year-over-year suggest a range of approximately 3.7% to 3.9%, though August-specific nowcasts are not yet available [5]. Reflecting these trends, Goldman Sachs has revised its 2026 core Personal Consumption Expenditures (PCE) forecast upward to 2.6% year-over-year from 2.5%, with a headline PCE forecast of 3.4% [6]. The Federal Reserve's general 2026 inflation forecast stands around 2.6%, while the New York Fed's 1-year inflation expectations, as of April 2026, are at 3.6% [7][8].
Sources (8)
  1. 12026 Economic Release Calendar - Consumer Price Index | FRED | St. Louis Fedfred.stlouisfed.org
  2. 2Schedule of Releases for the Consumer Price Indexbls.gov
  3. 3September 11, 2026: CPI in August Prediction Marketrobinhood.com
  4. 4Consumer Price Index Summary - 2026 M03 Resultsbls.gov
  5. 5Inflation Nowcastingclevelandfed.org
  6. 6Goldman Sachs lifts 2026 PCE inflation forecast amid ongoing U.S.-Iran deadlock By Investingng.investing.com
  7. 7Consumer Price Index in the USmoneylion.com
  8. 8Short-Term Inflation Expectations Increase Further, Longer-Term Expectations Stable - FEDERAL RESERVE BANK of NEW YORKnewyorkfed.org

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Significant Price Movements

Notable price changes detected in the chart, along with research into what caused each movement.

Outcome: Above 0.3%

📉 May 06, 2026: 9.0pp drop

Price decreased from 52.0% to 43.0%

What happened: The provided research does not identify a clear primary driver for the 9.0 percentage point drop in the "CPI in August Above 0.3%" prediction market on May 06, 2026. News on that day and May 05, 2026, from sources like Bloomberg and Business Insider, indicated rising inflation concerns, including a warning from the Fed's Goolsbee and a "Rare Inflation Signal" from Stifel [1]. Such reports would typically suggest an increased, not decreased, likelihood of August CPI being above 0.3%. No specific social media activity or market structure event was identified in the provided information that aligns with a decrease in inflation expectations on this date. Social media activity appears to be irrelevant to this particular price movement based on the available data.

📈 May 05, 2026: 10.0pp spike

Price increased from 42.0% to 52.0%

What happened: The primary driver of the price movement was the Federal Reserve's updated inflation forecast released on May 5, 2026, which revised its trailing-twelve-month inflation projection to 3.56% and explicitly stated no 2026 rate cuts were expected due to an ongoing energy shock [2]. This official announcement, coinciding with the market spike, directly signaled persistent inflationary pressures. While Donald Trump posted a social media attack on Powell on May 5, calling him a "disaster" amidst high yields and mortgages [3], this social media activity acted as a contributing accelerant to existing inflation concerns, rather than the primary cause.

Outcome: Above 0.0%

📉 May 04, 2026: 10.0pp drop

Price decreased from 83.0% to 73.0%

What happened: The primary driver of the prediction market price drop was the publication of a U.S. April CPI preview by ContinuumEconomics on May 04, 2026 [4]. This report forecasted April CPI to rise about +0.5% overall and +0.3% excluding food and energy, crucially noting that energy would rise less sharply than in March [4]. This outlook likely prompted a revision of future inflation expectations, suggesting an easing of inflationary pressures that reduced confidence in CPI being significantly "Above 0.0%" in August. Based on the provided research, social media activity was irrelevant to this market movement [5].

Outcome: Above 0.1%

📉 May 02, 2026: 9.0pp drop

Price decreased from 74.0% to 65.0%

What happened: The provided information does not identify a primary driver for the 9.0 percentage point drop in the "CPI in August Above 0.1%" prediction market on May 02, 2026. Traditional news from late April and early May 2026 reported high and rising inflation, with March 2026 CPI at 0.9% MoM and PCE at 0.7% MoM, driven by factors like an "Iran war" and soaring gas prices [6]. This economic context would typically suggest an increased likelihood of August CPI being above 0.1%, rather than the observed decrease. No social media activity from key figures or viral narratives is found in the provided sources. Based on the available data, social media was irrelevant.

📈 April 26, 2026: 10.0pp spike

Price increased from 64.0% to 74.0%

What happened: The provided sources do not contain information directly identifying a primary driver, particularly social media activity, for a 10.0 percentage point spike in the "CPI in August: Above 0.1%" prediction market on April 26, 2026. The only relevant data pertains to a substantial 0.9% increase in the March 2026 CPI-U, driven by a 21.2% rise in gasoline prices due to an oil shock, which was officially announced around April 10, 2026 [7]. While this significant inflation could influence general expectations, the sources provide no specific link to the August CPI market movement or related social media activity on the specified date. Therefore, social media was not identified as a primary driver or contributor based on the available information.
Sources (7)
  1. 1Rare Inflation Signal Flashing for First Time in 65 Years, Stifel Says - Business Insiderbusinessinsider.com
  2. 2Yikes! The Federal Reserve's April and Quarterly Annualized Inflation Forecast Was Just Updated -- and It Isn't Prettyfool.com
  3. 3CPI Shock Incoming May 12: Trump vs Powell Drama Fuel Marketcoingabbar.com
  4. 4Preview: Due May 12 - U.S. April CPI - Energy to rise less scontinuumeconomics.com
  5. 5Consumer Price Index News Release - 2026 M03 Resultsbls.gov
  6. 6Consumer Price Index Summary - 2026 M03 Resultsbls.gov
  7. 7Consumer Price Index News Release - 2026 M03 Resultsbls.gov

4. Market Data

Contract Snapshot

This market resolves to YES if the August 2026 Consumer Price Index (CPI) increases by more than 0.2% (single-decimal); otherwise, it resolves to NO. The Bureau of Labor Statistics (BLS) verifies the outcome using the single-decimal value, with trading closing on September 11, 2026, at 8:25 AM EDT and projected payout at 10:01 AM EDT. Should a government shutdown delay data release, the market's expiration will be extended, and insider trading is prohibited.

Market Discussion

Prediction market participants appear to peg August CPI around 2.8% headline and 3.1% core, signaling expectations of contained inflation and potential for easing [1]. Markets like Robinhood's "CPI in August" (event September 11, 2026) show active contract trading for various percentage increases [2]. Public discussion on platforms such as Polymarket actively debates these outcomes [3], with some commentators observing a sentiment for significant rate cuts post-August CPI, while others question the market's implied magnitude [4].

Sources (4)
  1. 1Kalshi traders peg August CPI at 2.8%news.kalshi.com
  2. 2September 11, 2026: CPI in August Prediction Marketrobinhood.com
  3. 3August Inflation - Monthly Trading Odds & Predictions 2026 | Polymarketpolymarket.com
  4. 4Our Updated Game Plan With the August CPI Report in Hand | TheStreet Propro.thestreet.com

5. Trust Index

This scorecard was computed Sep 11, 2026 and may not reflect current market conditions.

Octagon Trust Index Kalshi 68 Caution

Scheduled statistical release: the agency holds the number before publication

Integrity risk· Information exposure

How it adds up
Integrity80% of score66Caution
Trade quality20% of score77Good
Trust score68Caution

Weighted blend with hard caps — a critically weak safety pillar, or a severe trading anomaly, caps the total regardless of the rest. Full methodology · About the Trust Index

Trust profile
Integrity4 screens run · 3 don't apply · 3 awaiting data
Market integrity
75Good

Outcome is hard to influence

Large tradesTrade signals · medium confidence

Largest single print on KXCPI-26AUG-T-0.2 carried 45% of its $4,358 tape (window is 100% of 24h flow; print is 29d old)

Screened clean
Thin-volume movesMoves carried volume Clear
Size patternsTrade sizes look organic. Clear
2 screens not run
Outcome control · doesn't apply to this market type
Thin-leg conviction · doesn't apply to this market type
Info fairness
40High Risk
Information exposureStructural risk · high confidence

Scheduled statistical release: the agency holds the number before publication

4 screens not run
Move vs. catalyst · data source not connected
Longshot repricing · data source not connected
Pre-broadcast certainty · doesn't apply to this market type
Cross-venue timing · data source not connected
Resolution quality
92Strong

Resolution mechanism is dependable

No suspicious activity on any screen

Resolution rules read: Clear

Liquidity
78Tradeable

Fills fine at modest size

15 contracts · worst first

Above 0.8%4
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.9%4
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Above 1.0%4
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.6%5
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.7%5
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.5%10
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Above -0.3%39
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.4%58
Thin · low confidence

Light recent trading — size may not fill near the screen price.

Above -0.2%63
Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.0%76
Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.3%76
Tradeable · high confidence

Typical bar range 4.9% of price over 21 traded bars

Above -0.4%77
Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Above -0.1%78
Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.1%81
Deep · low confidence

Light recent trading — size may not fill near the screen price.

Above 0.2%84
Deep · high confidence

Typical bar range 2.2% of price over 17 traded bars

Move quality
66Mostly confirmed

Most moves carried real volume

15 contracts · worst first

Above 0.1%63
Mostly confirmed · high confidence

Volume opposes the move over 6h

Above 0.3%66
Mostly confirmed · high confidence

Volume opposes the move over 6h

Above 0.7%81
Confirmed · high confidence

Volume confirms the move over 6h

Above 0.5%86
Confirmed · high confidence

Volume confirms the move over 6h

Above -0.4%—
No significant move (6h)

Price was stable over the last 6 hours.

Above -0.3%—
No significant move (6h)

Price was stable over the last 6 hours.

Above -0.2%—
No significant move (6h)

Price was stable over the last 6 hours.

Above -0.1%—
No significant move (24h)

Price was stable over the last 24 hours.

Above 0.0%—
No significant move (6h)

Price was stable over the last 6 hours.

Above 0.2%—
No significant move (6h)

Price was stable over the last 6 hours.

Above 0.4%—
No significant move (6h)

Price was stable over the last 6 hours.

Above 0.6%—
No significant move (6h)

Price was stable over the last 6 hours.

Above 0.8%—
No significant move (6h)

Price was stable over the last 6 hours.

Above 0.9%—
No significant move (6h)

Price was stable over the last 6 hours.

Above 1.0%—
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95Clear

Counts toward Resolution quality, not here

15 contracts · worst first

Above -0.4%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above -0.3%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above -0.2%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above -0.1%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.0%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.1%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.2%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.3%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.4%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.5%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.6%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.7%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.8%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.9%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 1.0%95
Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Trade quality
77Good

Order book supports trading

Deep and tight enough to trade efficiently.

Outcome quality 77 (notional-weighted across 15 scored legs)

Above -0.4%77Market scoreLiquidity77Move quality–Rule clarity95
Why 77
Liquidity
77 · Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above -0.3%39Market scoreLiquidity39Move quality–Rule clarity95
Why 39
Liquidity
39 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above -0.2%63Market scoreLiquidity63Move quality–Rule clarity95
Why 63
Liquidity
63 · Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above -0.1%78Market scoreLiquidity78Move quality–Rule clarity95
Why 78
Liquidity
78 · Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (24h)

Price was stable over the last 24 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.0%76Market scoreLiquidity76Move quality–Rule clarity95
Why 76
Liquidity
76 · Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.1%81Market scoreLiquidity81Move quality63Rule clarity95
Why 81
Liquidity
81 · Deep · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
63 · Mostly confirmed · high confidence

Volume opposes the move over 6h

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.2%84Market scoreLiquidity84Move quality–Rule clarity95
Why 84
Liquidity
84 · Deep · high confidence

Typical bar range 2.2% of price over 17 traded bars

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.3%73Market scoreLiquidity76Move quality66Rule clarity95
Why 73
Liquidity
76 · Tradeable · high confidence

Typical bar range 4.9% of price over 21 traded bars

Move quality
66 · Mostly confirmed · high confidence

Volume opposes the move over 6h

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.4%58Market scoreLiquidity58Move quality–Rule clarity95
Why 58
Liquidity
58 · Thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.5%10Market scoreLiquidity10Move quality86Rule clarity95
Why 10
Liquidity
10 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
86 · Confirmed · high confidence

Volume confirms the move over 6h

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.6%5Market scoreLiquidity5Move quality–Rule clarity95
Why 5
Liquidity
5 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.7%5Market scoreLiquidity5Move quality81Rule clarity95
Why 5
Liquidity
5 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
81 · Confirmed · high confidence

Volume confirms the move over 6h

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.8%4Market scoreLiquidity4Move quality–Rule clarity95
Why 4
Liquidity
4 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 0.9%4Market scoreLiquidity4Move quality–Rule clarity95
Why 4
Liquidity
4 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear
Above 1.0%4Market scoreLiquidity4Move quality–Rule clarity95
Why 4
Liquidity
4 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
95 · Clear · high confidence

Objective result from a trusted source (allowlist)

allowlist · Clear

underwriting_v1.3 · computed Sep 11, 2026

6. What potential geopolitical events or supply chain pressures in summer 2026 pose the greatest risk of an inflation surprise in the August CPI report?

Global Commodity Prices Rise16% in 2026 [1][2][3][4][5][6][7][8]
Crude Oil Price Surge$200/bbl [9][2]
Fertilizer Prices Rise31% in 2026 [1][2]
Major oil shocks and trade tensions threaten August 2026 CPI. The greatest risks for an inflation surprise in the August 2026 CPI report stem from potential major oil supply shocks, which could significantly increase crude prices, directly impacting energy, transportation, and manufacturing costs across all sectors [9][2][10][1][3][11][12][6][13][8]. Simultaneously, intensifying trade clashes between Europe and China, involving new tariffs or export restrictions in strategic sectors like electric vehicles and semiconductors, are expected to disrupt global supply chains and raise import prices [14][15][16]. This reflects a persistent trend of "geoeconomic confrontation" and new economic nationalism that is projected to continue, altering trade flows and increasing costs [17][18][15][19][5]. Furthermore, the surging demand for power driven by AI investments and data center expansion is straining existing electricity grids, contributing to rising energy-related expenses that could broadly fuel inflation [20][3][12].
Food prices face significant upward pressure from multiple factors. Fertilizer prices are projected to rise due to Middle East disruptions and elevated natural gas costs, directly threatening global crop yields and increasing food production expenses [1][2][21][22]. The agricultural sector also anticipates severe labor shortages in 2026, exacerbated by stricter immigration policies, which could delay harvests, slow processing, and disrupt transport, ultimately leading to higher food prices [10]. Additionally, extreme weather events such as droughts, floods, or unexpected freezes in key food-producing regions during summer 2026 could significantly reduce crop yields and drive up food commodity prices [10][23][24][1].
Geopolitical shipping disruptions and past tariffs add inflationary pressure. While some forecasts anticipate a potential decline in ocean freight rates due to overcapacity in 2026, ongoing geopolitical uncertainties, particularly Red Sea rerouting, continue to cause extended voyage lengths, higher fuel costs, and increased insurance premiums [17][25][26][27][28][11][12][6]. Moreover, the delayed effects of previous tariffs are expected to continue passing through to consumer prices in the first half of 2026, further contributing to inflationary pressures [29][12][16][7].
Sources (29)
  1. 1worldbank.orgblogs.worldbank.org
  2. 2radiotamazuj.org
  3. 3cib.bnpparibasglobalmarkets.cib.bnpparibas
  4. 4imf.org
  5. 5weforum.org
  6. 6mapfre.com
  7. 7piie.com
  8. 8europa.euecb.europa.eu
  9. 9alvarezandmarsal.com
  10. 10agrichain.com
  11. 11knowerx.com
  12. 12investing.com
  13. 13spglobal.com
  14. 14forbes.com
  15. 15lazard.com
  16. 16just-style.com
  17. 17veson.com
  18. 18globaltrademag.com
  19. 19ey.com
  20. 20spglobal.com
  21. 21dtnpf.com
  22. 22metlife.cominvestments.metlife.com
  23. 23worldbank.orgblogs.worldbank.org
  24. 24agrolatam.com
  25. 25ups.comes-us.ups.com
  26. 26mybluegrace.com
  27. 27alixpartners.com
  28. 28lloydslist.com
  29. 29weaver.com

7. What do the most recent 2026 trends in core inflation components, specifically shelter and services ex-housing, indicate about underlying price pressures leading into August?

Shelter MoM Increase (March 2026)+0.3% [1]
Shelter YoY Increase (March 2026)+3.0% [1]
Core Services ex-Housing 12-month rate (March)+3.4% [2]
Recent trends in core inflation components suggest a steady-to-cool underlying price-pressure profile leading into August 2026. This assessment is consistent with shelter’s ongoing lagged transmission from softer market rents and core services ex-housing maintaining a sideways trajectory [3][4][2].
Shelter disinflation continues, driven by lagged transmission from softer market rents. The March 2026 Consumer Price Index (CPI) release indicated that shelter rose +0.3% month-over-month and +3.0% year-over-year [1]. This demonstrates that shelter disinflation remains the dominant margin shift rather than a re-acceleration of services. With shelter’s year-over-year rate near 3.0%, a decrease from prior peaks, this trend aligns with the ongoing lagged transmission from softer market rents [3][4][2].
Core services ex-housing has remained stable, not trending higher over the past year. This component’s 12-month rate has held steady around mid-3%, specifically quoted as +3.4% for the 12 months ended March [2]. This suggests that underlying non-shelter service inflation pressure is not meaningfully trending higher into mid-2026, which contributes to an implied underlying price-pressure profile that is steady-to-cool through the coming months [2][3][4]. A prediction-market datapoint for "CPI core year-over-year in Aug 2026?" from FieldEstimate shows live odds but possesses very low liquidity, thus it should be treated as directional rather than definitive [5].
Sources (5)
  1. 1Consumer Price Index Summary - 2026 M03 Resultsbls.gov
  2. 2Core services ex-housing has moved sideways for the past yearx.com
  3. 3Consumer Price Index — March 2026: Energy Shock Lifts Headline; Core Inflation Remains Contained - Piedmont Crescent Capitalpiedmontcrescentcapital.com
  4. 4CPI Shelter Forecast, April 2026 - Zillow Researchzillow.com
  5. 5CPI core year-over-year in Aug 2026? — Live odds on Kalshi | Field Estimatefieldestimate.org

8. How have the Federal Reserve's preferred PCE inflation metric and the headline CPI differed throughout 2026, and what does this divergence imply for the August report?

Headline PCE inflation (March 2026)3.50% year-over-year [1][2][3][4][2]
Core PCE inflation (March 2026)3.2% [1][2][3][4][2]
Core PCE (3-month annualized, Feb 2026)4.1% [5]
PCE inflation has notably outpaced CPI in 2026. Throughout the year, the Federal Reserve's preferred Personal Consumption Expenditures (PCE) inflation metric has consistently run higher than the headline Consumer Price Index (CPI), marking a reversal of historical trends [5][6][4]. As of March 2026, headline PCE inflation stood at 3.50% year-over-year, while headline CPI registered 3.3%. Similarly, core PCE inflation reached 3.2%, compared to core CPI's 2.6% [1][2][3][4][2]. This shift has resulted in a 60 basis point positive difference between PCE and CPI on a year-over-year basis, moving beyond its traditionally negative range. The three-month annualized pace of core PCE also saw a significant increase, surging from 2.4% in November 2025 to 4.1% in February 2026 [5].
Methodological differences drive the observed inflation metric divergence. This variation between PCE and CPI is attributed to several factors, including distinct methodologies, broader scope, and differing weighting schemes [5][7][6][8]. PCE utilizes a chain-weighted Fisher-Ideal formula, which adjusts for consumer substitution patterns, whereas CPI employs a fixed-weight index. Additionally, PCE incorporates certain items like employer-paid health insurance that are not included in CPI [5][7][6][8]. Weighting schemes also differ significantly; shelter holds a larger weight in CPI (approximately 34%) compared to PCE (around 16%), while PCE gives greater weight to healthcare, financial services, and technology-related products [5][6][8][9]. Furthermore, rising tariff costs and energy-sensitive supply chains are contributing to the increase in PCE, with tariffs projected to add 50 basis points to headline inflation by mid-2026. Geopolitical conflicts have the potential to further widen this gap [5][10].
Persistent PCE inflation complicates Federal Reserve's policy decisions. The sustained and widening gap, with PCE inflation increasing more rapidly, suggests that inflationary pressures in categories heavily weighted by PCE, such as technology and specific services, are transitioning from transitory to more structural in nature [5]. This trend complicates the Federal Reserve's outlook on monetary policy and its considerations for potential interest rate cuts [5]. Looking ahead, prediction markets and some economists anticipate continued increases in CPI, with a risk of overall inflation surpassing 4% by the end of 2026 due to various economic factors [10][11][12].
Sources (12)
  1. 1macromicro.meen.macromicro.me
  2. 2senate.govjec.senate.gov
  3. 3tradingeconomics.com
  4. 4advisorperspectives.com
  5. 5seekingalpha.com
  6. 6clevelandfed.org
  7. 7amstat.orgww2.amstat.org
  8. 8pictoninvestments.com
  9. 9oxfordeconomics.com
  10. 10piie.com
  11. 11kalshi.com
  12. 12morningstar.com

9. Which precursor data releases in August and early September 2026, such as the Producer Price Index (PPI), will be most critical for traders to watch ahead of the official CPI report?

PCE Price Index for July 2026 ReleaseAround August 26, 2026 [1]
August 2026 ISM Manufacturing PMI ReleaseFirst business day of September 2026 [2]
August 2026 ISM Services PMI ReleaseThird business day of September 2026 [2]
The Personal Consumption Expenditures (PCE) Price Index is a critical inflation gauge. For traders monitoring precursor data ahead of the official CPI report, the PCE Price Index for July 2026 is a key release. This index serves as the Federal Reserve's preferred measure of inflation and is scheduled for release around August 26, 2026 [1]. Its core reading, which excludes volatile food and energy components, is particularly scrutinized for insights into underlying inflationary trends [3].
ISM PMIs and Import/Export Price Indexes offer leading inflation signals. The August 2026 ISM Manufacturing and Services PMIs are important indicators to watch. The ISM Manufacturing PMI is anticipated on the first business day of September 2026, while the ISM Services PMI is expected on the third business day of September 2026 [2]. These reports contain "Prices Paid" sub-indexes, which are widely considered leading indicators of future inflation [4]. Additionally, the U.S. Import and Export Price Indexes for July 2026 are scheduled for release around August 18, 2026 [5].
Sources (5)
  1. 1tradingcalendar.com
  2. 2ismworld.org
  3. 3bea.gov
  4. 4fxstreet.com
  5. 5bls.gov

10. How do the high-frequency inputs used by the Cleveland Fed's Nowcast compare to the econometric models used by major banks like Goldman Sachs for forecasting Q3 2026 inflation?

Cleveland Fed Nowcast Update Frequencydaily [1]
Goldman Sachs Core PCE Inflation Forecastaround 2.2% by December 2026 (excluding tariff effects) [2][3][4][5]
Goldman Sachs Core CPI Inflation Forecast2.1% by the end of 2026 [2][3][4][5]
The Cleveland Fed and Goldman Sachs use distinct inflation forecasting methodologies. The Cleveland Fed's Nowcast relies heavily on timely, high-frequency data, providing immediate insights into price movements crucial for predicting inflation in the current or very next month or quarter, such as Q3 2026 as it unfolds [1][6][7]. In contrast, Goldman Sachs' econometric models utilize a broader and more diverse range of macroeconomic and financial data, designed for both immediate and longer-term projections, offering a comprehensive view of the inflation trajectory over horizons extending to year-end 2026 and into 2027 [7][2][3][4].
The Cleveland Fed's Nowcast uses real-time, granular data for rapid updates. It synthesizes inputs such as daily oil prices, weekly gasoline prices, and monthly readings of the Consumer Price Index (CPI) and Personal Consumption Expenditures (PCE) price indexes [1][6][8]. These forecasts are updated daily as new high-frequency data becomes available, allowing for rapid adjustments to emerging economic trends [1]. Historically, the Nowcast has shown strong accuracy, frequently outperforming traditional statistical models and professional forecaster surveys for headline CPI and PCE inflation [1][9][10][11].
Goldman Sachs' models incorporate diverse data for detailed inflation projections. Their component-level inflation models integrate measures of labor and product market slack, indicators related to the pass-through of commodity, import, and asset prices, and alternative price indices from non-government sources [7]. They also factor in consumer and business inflation expectations and the jobs-workers gap [7]. For Q3 2026, Goldman Sachs has provided various projections, with core PCE inflation expected to fall to around 2.2% by December 2026 (excluding tariff effects) and core CPI to 2.1% by the end of 2026, though some forecasts were revised upwards in March 2026 [2][3][4][5]. While traditional econometric models generally outperform most machine learning algorithms for nowcasting, linear machine learning algorithms like Lasso and Elastic Net can perform exceptionally well when applied to rich high-frequency data [12].
Sources (12)
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  2. 2thestreet.com
  3. 3goldmansachs.com
  4. 4gspublishing.com
  5. 5mexc.com
  6. 6clevelandfed.org
  7. 7gspublishing.com
  8. 8clevelandfed.org
  9. 9clevelandfed.org
  10. 10repec.orgideas.repec.org
  11. 11researchgate.net
  12. 12imf.org

11. What Could Change the Odds

Key Catalysts

Key catalysts for potentially higher inflation, such as a bullish August 2026 CPI, include stronger-than-expected economic growth, which could boost consumer demand and business investment [1][2][3]. Persistent supply chain bottlenecks or new shocks could also limit goods availability and increase costs [4][5]. Additionally, spikes in global oil, natural gas, or agricultural commodity prices would directly impact the CPI [4][5][3], with energy prices specifically noted as a significant driver of CPI increases in recent years [4][5][3]. Aggressive wage growth could lead businesses to raise prices [5][2], and if people expect prices to rise, they may demand higher wages or raise prices themselves, perpetuating the inflationary cycle [6][1][2]. Expansionary monetary policy, such as central banks cutting interest rates or implementing other stimulus measures, could fuel demand and inflation [7][8]. A significant depreciation of the local currency would make imports more expensive, also contributing to higher inflation [2]. Increased consumer spending, rising incomes, or lower borrowing costs can also fuel inflation [1][2], and if businesses face higher input costs, they often pass these on to consumers through higher prices [1][2][3].
Conversely, bearish catalysts for the August 2026 CPI, indicating lower inflation, involve an economic slowdown or recession, which would reduce consumer and business spending, dampening demand and putting downward pressure on prices [9]. Contractionary monetary policy, such as continued high interest rates or further tightening by central banks, would curb demand and cool inflation [7][8][9].

Key Dates & Catalysts

  • Expiration: December 11, 2026
  • Closes: September 11, 2026
Sources (9)
  1. 1clevelandfed.org
  2. 2rba.gov.au
  3. 3pimco.com
  4. 4raisin.com
  5. 5bls.gov
  6. 6imf.org
  7. 7riksbank.se
  8. 8abacademies.org
  9. 9forex.com

13. Historical Resolutions

Historical Resolutions: 20 markets in this series

Outcomes: 13 resolved YES, 7 resolved NO

Recent resolutions:

  • KXCPI-26MAR-T1.3: NO (Apr 10, 2026)
  • KXCPI-26MAR-T1.2: NO (Apr 10, 2026)
  • KXCPI-26MAR-T1.1: NO (Apr 10, 2026)
  • KXCPI-26MAR-T1.0: NO (Apr 10, 2026)
  • KXCPI-26MAR-T0.9: NO (Apr 10, 2026)