Will the rate of core CPI inflation be above 2.9% for the year ending in November 2026?

- [2026-10-14] BLS, the resolution source, shows September 2026 core CPI (all items less food and energy) up 0.3% m/m SA and 2.6% y/y NSA. August was 2.4% y/y. The all-items rate was 3.7% y/y. https://www.bls.gov/news.release/cpi.nr0.htm - [2026-10-14] Core beat consensus of 0.2% m/m and 2.5% y/y. Unrounded core was +0.33% m/m and 2.56% y/y, after 2.45% in August. Only 11 of 73 Bloomberg-surveyed economists had forecast 0.3%. https://pro.thestreet.com/market-commentary/hot-cpi-puts-october-rate-hike-back-in-play - [2026-10-14] Core pressure is broadening. Shelter rose 0.39% m/m and 3.22% y/y. Supercore (core services excluding housing) rose 0.42% m/m and 3.13% y/y. Car rental, toys, used cars and motor vehicle insurance all rose. https://pro.thestreet.com/market-commentary/hot-cpi-puts-october-rate-hike-back-in-play - [2026-10-14] The headline is driven by energy, linked to a US–Iran war that began in late February. Gasoline rose 9.1% in September and is up 34% y/y. Airline fares are up about 22% y/y on jet fuel costs. Pass-through to core is a live risk. https://www.cnbc.com/2026/10/14/cpi-inflation-report-september-2026.html - [2026-10-14] Reports put August's 2.4% core reading as the lowest since March 2021. That reading was helped by a one-off cellphone effect. https://www.usinflationcalculator.com/inflation/us-cpi-sept-2026-inflation-hits-3-7-as-gas-prices-surge/100073364/ - [2026-10-14] The November 2026 CPI is scheduled for Dec 10, 2026 at 8:30 ET, the same day trading closes. The October CPI is due Nov 10. https://www.bls.gov/schedule/news_release/cpi.htm - [2026-10-14] Reaching a rounded 3.0% or higher in November requires about +0.4 pt from September's 2.6% in two months. Core would need to average roughly 0.45–0.5% m/m, against recent prints of about 0.3%. This is my arithmetic, and base effects from the 2025 shutdown are not modelled. Nov 2025 core was 2.6% y/y, and BLS skipped October 2025 collection. https://finance.yahoo.com/news/cpi-inflation-pressures-ease-in-november-as-consumer-prices-clock-27-annual-rise-133224849.html - [2026-10-14] Core PCE tracking estimates for September are about 3.1% y/y (Goldman 3.09%, BofA 3.1%). The September PCE release is Oct 29. https://pro.thestreet.com/market-commentary/hot-cpi-puts-october-rate-hike-back-in-play - [2026-10-14] The Fed hiked in mid-September, its first hike in three years. Markets put about 44% odds on an Oct 27–28 hike and about 96% on a hike by year-end. Total hikes priced through 2027 are about 92 bp. https://www.cnbc.com/2026/10/14/cpi-inflation-report-september-2026.html - [2026-10-07/13] The Cleveland Fed nowcast for September core was 2.39% y/y, and the actual print was 2.6%. This was a sizeable miss to the upside. https://fxstreet.com/analysis/cpi-preview-september-2026-energy-drives-headline-but-core-is-where-the-real-action-is-202610141005 - [2026-10-14] Kiplinger quotes an economist (Payne) forecasting core CPI of 2.7% at year-end 2026. https://www.kiplinger.com/investing/economy/cpi-report-september-2026-what-to-expect - [2026-05 (Q2 SPF)] The Philadelphia Fed Survey of Professional Forecasters saw Q4/Q4 2026 core CPI at 2.9%. That survey predates the recent low prints. https://www.philadelphiafed.org/surveys-and-data/real-time-data-research/spf-q2-2026 BOTTOM LINE: Core CPI was 2.6% y/y in September, with momentum firming (two 0.3% prints and broadening). Even so, a November print above 2.9% (3.0% or higher) needs roughly a 0.4-point rise in two months. That requires core m/m prints well above recent trend, and nothing found suggests a government shutdown threatens the Dec 10 release. NOT FOUND: A published consensus or nowcast for the October or November 2026 core y/y. Index levels for Nov 2025 and the base-effect detail. Any current shutdown risk for the Dec 10 release.

- [2026-10-14] BLS reported September 2026 core CPI (all items less food and energy) at +0.3% m/m and +2.6% y/y, up from 2.4% in August. Headline CPI was 3.7% y/y. https://www.bls.gov/news.release/cpi.nr0.htm - [2026-10-14] September core beat consensus of +0.2% m/m and 2.5% y/y. August's 2.4% was the lowest since March 2021. Core was 0.3% m/m in both August and September. https://www.cnbc.com/2026/10/14/cpi-inflation-report-september-2026.html - [2026-10-14] The "above 2.9%" strike needs a November 2026 y/y print of 3.0% or higher. That is 0.4pp above September's 2.6%. The latest core y/y reading above 2.9% was in the 3.0%-or-higher range in September 2025, per Trading Economics' history. The 2025 average was 2.7% for headline, and core stayed in the 2.4–2.6% range from late 2025 to September 2026. https://tradingeconomics.com/united-states/core-inflation-rate - [2026-10-14] Base-effect caveat: BLS published no October 2025 CPI because of the 2025 funding lapse. The headline index table shows a gap for October 2025, and November 2025 is only 324.122, below September 2025's 324.800. The November 2025 base is therefore depressed. That likely lifts the November 2026 y/y relative to a normal base. I inferred that November 2025 core rose only about 0.2% over the two months from September (this is my recollection of the 2025 release, not re-verified in this session). If so, core running 0.25% per month in Oct–Nov 2026 would give roughly 2.8–2.9% y/y, and about 0.3% per month would give roughly 3.0%. https://www.usinflationcalculator.com/inflation/consumer-price-index-and-annual-percent-changes-from-1913-to-2008/ - [2026-10-13] The Cleveland Fed nowcast (before the September print) had October core at +0.20% m/m. It put core y/y at 2.30% for October and 2.39% for September (the actual September figure was 2.6%). It put Q4 2026 annualized core CPI at 2.56%. The nowcast simply extrapolates trailing 12-month core, so it is a weak guide when momentum is rising. https://www.clevelandfed.org/indicators-and-data/inflation-nowcasting - [2026-10-12] Kalshi traders see core staying "elevated" through 2026. They price only a 6% chance that core falls below 2.2% this year. A summary reports median core expectations for late 2026 around 2.7% (secondary source, written before the September print). https://www.cnbc.com/2026/10/12/inflation-will-remain-sticky-in-2026-according-to-prediction-markets.html and https://cryptobriefing.com/kalshi-traders-inflation-peaked-2026-sticky/ - [2026-07 to 2026-10] Kalshi's October core m/m contract showed an 80% chance of "above 0.1%" (snapshot four days before the page date, so possibly stale). November core m/m strikes were quoted at 83% for above 0.1% and 36% for above 0.4% (a snapshot of unknown date, about 57 days old). These imply a typical core m/m of roughly 0.2–0.3%. https://kalshi.com/markets/kxcpicore/cpi-core/kxcpicore-26oct and https://predictionmarketspicks.com/how-it-settles/KXCPICORE - [2026-05 approx] The Philadelphia Fed Q2 2026 SPF (about 152 days old) had core CPI Q4/Q4 2026 at 2.9% and Q3 2026 annualized at 2.9%. Realised core has come in below that path: Q3 annualized was roughly 2.5–3%, with y/y at 2.6%. https://www.philadelphiafed.org/surveys-and-data/real-time-data-research/spf-q2-2026 - [2026-10-14] The context is a Middle East energy shock. The US–Iran war started in late February, gasoline is up 34% y/y, and airline fares are up 22.4% y/y. Markets price a better-than-96% chance of a Fed hike by December. Commentators say core pass-through could rise. J.P. Morgan said in its 2026 outlook that if oil stays near $100, core could go "well above 3%". https://www.cnbc.com/2026/10/14/cpi-inflation-report-september-2026.html and https://www.jpmorgan.com/insights/global-research/economy/global-inflation-forecast - [2026-10-14] Reference class: core CPI y/y moving up 0.4pp or more in two months is uncommon. Core is a smooth, persistent series, and typical two-month changes in y/y are within ±0.2pp. The exceptions are base-effect distortions like the one above and 2021 post-COVID surges. Kalshi's own record: its core CPI mean absolute error on release day is about 0.07pp, roughly equal to Bloomberg consensus, per a Fed FEDS paper (2026). https://www.federalreserve.gov/econres/feds/files/2026010pap.pdf - [2026-10-14] Upcoming: the October CPI is due 2026-11-10 and the November CPI in the second week of December. I did not confirm the November date. The market's trading close is 2026-12-10. The shutdown-extension rule applies only if a shutdown delays the data. Trading Economics' model sees core near 2.8% by end of the quarter (a model output, not a consensus). https://tradingeconomics.com/united-states/core-inflation-rate BOTTOM LINE: The outside view favours NO. Core is at 2.6%, and reaching 3.0% or higher in November requires about +0.4pp in two months. The depressed November 2025 base (the missing October 2025 data) and recent 0.3% monthly prints make that more plausible than in a normal year. A plausible central range is roughly 2.7–3.0%, so the 2.9% strike is a live tail rather than a long shot, but it needs core near 0.3% or more per month in both October and November. NOT FOUND: the actual Nov 2025 core index and m/m (I used a recalled approximation); the current Kalshi/Polymarket price for the Nov 2026 core y/y strikes (deliberately not searched for); any post-September-print consensus for November 2026 core y/y; any Blue Chip, Fed SEP or SPF Q3 2026 core CPI forecasts.

YES means: the BLS all-items-less-food-and-energy CPI for November 2026 (released Dec 10) shows a 12-month change of 3.0% or higher as printed to one decimal. A 2.9% print resolves No. - [2026-10-14] **The colleagues' arithmetic is probably too strict.** They say core needs about 0.45–0.5% m/m. That ignores the depressed Nov 2025 base. Morningstar (Jan 9) says core rose only about 0.2% over the Sept→Nov 2025 span, which BLS never split by month. BLS's own Sept 2026 table gives the Sep 2025 all-items index (324.800), but I did not retrieve the Nov 2025 core index. My own estimate, not a BLS figure: Sep 2026 core is 338.90 NSA per Trading Economics, and unrounded y/y is 2.56%. That puts Sep 2025 core near 330.4 and Nov 2025 near 331.1. A 2.95% y/y in Nov 2026 then needs about +0.58% NSA over two months. That is roughly 0.29% a month, in line with the last two SA prints of 0.3%. NSA versus SA seasonal differences could move this. https://tradingeconomics.com/united-states/inflation-cpi - [2026-10-14] **Core only needs to hold its recent pace.** Core was +0.3% SA in both Aug and Sep (BLS Table 1). Unrounded September was +0.33%. If Oct and Nov each print about 0.3%, the y/y reaches roughly 3.0%. If they print 0.25%, it lands near 2.9% and resolves No. The path is therefore a near-knife-edge, not a long shot. https://www.bls.gov/news.release/cpi.t01.htm - [2026-01-09] **The Nov 2025 base is artificially low in more than rent.** Oxford Economics' Yaros said late-collected data understated Nov 2025 goods prices, because holiday discounts were missed. Shelter was also carried forward flat in Oct 2025. The Morningstar piece says core CPI rose just 0.2% from September to November 2025. That cheap base stays in the Nov 2026 y/y denominator. https://www.morningstar.com/economy/december-cpi-report-expected-show-inflation-elevated-doubts-remain-about-data - [2025-12-19] **The Oct 2025 zero is documented by BLS.** The MLR article says Oct 2025 rent and OER indexes were unchanged from September, because April values were carried forward. Swissinfo adds that some errant October values would not leave the index until April. That is why the Nov 2025 base is low. https://www.bls.gov/opub/mlr/2026/article/counterfactual-imputation-approaches-for-the-housing-component-of-the-october-2025-cpi.htm - [2026-10-14] **Shelter is re-accelerating, with a rent-sample catch-up in progress.** BLS Table 1 shows the SA shelter rise went from 0.1% in Jul to 0.3% in Aug to 0.4% in Sep. OER was +0.3% and rent +0.2% in September, with shelter at 3.2% y/y. The BofA caveat is that September may not mark a renewed OER acceleration. Bloomberg Economics' Wong called the OER print a potential aberration. Shelter is more than 40% of core, so a repeat 0.35–0.4% would carry core to 0.3% or more alone. https://www.bls.gov/news.release/cpi.t01.htm - [2026-10-14] **Energy pass-through is visible in core transport.** BLS Table 1 shows transport services at +0.6% SA in September, after +0.5% in August. Airline fares were +22.4% y/y, and motor vehicle repair was +5.8% y/y. Fuel oil is +74% y/y and gasoline +34% y/y. A further energy move would add to these lines. https://www.bls.gov/news.release/cpi.t01.htm - [2026-10-14] **Core goods have turned up.** TheStreet reports core goods at +0.25% m/m in September, the most since Jan 2025. That undercuts the tariff-fade story that Goldman had in its spring outlook, which had core goods inflation falling to 0.6% by December. https://pro.thestreet.com/market-commentary/hot-cpi-puts-october-rate-hike-back-in-play - [2026-10-07/13] **Forecasters have been missing low.** Consensus was 0.2% m/m for core in August and September, and the actual was 0.3% both times. EY's July forecast had core easing toward 2.4% by year-end, but core is already 2.6%. The Cleveland Fed's 2.39% September nowcast also missed. Extrapolation-based forecasts are biased low when momentum is rising. https://www.ey.com/en_us/insights/strategy/macroeconomics/cpi-report - [2026-09/10] **The Fed expects more inflation.** Fed staff raised their 2026–28 inflation forecasts, per the FOMC minutes. The September SEP median for 2026 core PCE rose to 3.4%, from 3.3% in June. The Q2 SPF had Q3 core CPI at 2.9% annualized and Q4 at 2.7%. Core CPI at 2.6% y/y against core PCE near 3.0–3.1% is an unusual gap. Core CPI has room to catch up. https://www.richmondfed.org/research/national_economy/macro_minute/2026/sep_by_sep_how_fed_walks_inflation_back_to_2_percent - [2026-06-10] **Core has been at this level this year.** CME Group reports core CPI was 2.9% y/y in May 2026, and Wichita Liberty puts it at 2.9% in May and 2.6% in June. The Sep 2025 base was 3.0%. A 3.0% print would be a return to the May-era range, not new territory. https://www.cmelitegroup.com/knowledge-hub/cpi-report-release-time-schedule-latest-data-and-how-it-moves-markets/ - [2026-10-14] **Release timing favours the YES path.** The Nov CPI is scheduled for Dec 10, the trading close. I found no reports of a shutdown threat. If a lapse delayed the release, the rules extend the deadline, which only delays resolution. BOTTOM LINE: The single most likely YES path has Oct and Nov core each printing about 0.3% or more SA. Shelter would need to stay near 0.35–0.4%, and airfares and core goods would have to keep passing through energy costs. Against the low Nov 2025 base (core up only about 0.2% over Sep–Nov 2025), that gets to 3.0%. By my rough estimate, a 0.25% pace stalls at 2.9%, which resolves No. NOT FOUND: the BLS Nov 2025 core index and m/m (I back-solved from Trading Economics' Sep 2026 core index, so treat the required pace as approximate). Any post-September consensus for Oct or Nov 2026 core y/y. An NSA seasonal pattern for Oct–Nov 2026.

YES means: the BLS-reported 12-month change in core CPI (all items less food and energy) for November 2026 is 3.0% or higher, i.e. above 2.9% at one decimal. - [2026-10-14] My arithmetic: the Nov 2025 base is weak, so the arithmetic for YES is closer than the headline gap suggests. The two-month core change from Sept to Nov 2025 was only 0.159% (NISA, the lowest since June 2020), against about 0.3% a month normally. Unrounded Sept 2026 core y/y was 2.56%, per the earlier reports. A rounded 3.0% needs about 2.95% unrounded. That requires a combined Oct+Nov 2026 core rise of roughly 0.55% or more, about 0.275% a month. The NO case therefore rests on a run of 0.2% prints, not on a structural obstacle. Source: https://www.nisa.com/perspectives/heavily-distorted-cpi-print-reveals-little-useful-information/ (search snippet; page returned 403 on fetch). - [2026-10-14] A month of 0.2% would leave NO safe. The earlier-cited Cleveland Fed nowcast had October core at 0.20%. Two 0.2% prints, about 0.4% in total, would put Nov y/y near 2.8%. Core ran 0.3% in both Aug and Sept, and unrounded Sept was 0.335% against a 0.21% consensus (Kiplinger quoting a bank note). So NO needs the Sept upside surprise to be partly noise. Source: https://www.kiplinger.com/investing/economy/cpi-report-september-2026-what-to-expect - [2026-10-14] Some of the September core strength was in volatile items. The CPI release listed recreation, used cars, airline fares and apparel among the gainers. Used cars and airline fares tend to reverse, and August's 2.4% was helped by a one-off cellphone effect, per the earlier reports. NO can argue that part of the 0.335% is non-recurring. Source: https://www.kiplinger.com/investing/economy/cpi-report-september-2026-what-to-expect - [2026-10-14] Forecaster views before the print were low on core. Morningstar/FactSet had September core at 0.2% and annual core holding at 2.4%. BofA said second-round effects from energy "should remain relatively contained" (about 2 days old). Kiplinger's economist sees core ending 2026 at 2.7% (cited in earlier reports). A 2.7% year-end path is a NO-consistent anchor, though the 2.7% figure is probably December and may be stale after the hot print. Source: https://www.morningstar.com/economy/cpi-forecasts-show-moderated-inflation-september-keeping-fed-hold - [2026-05] Philadelphia Fed SPF Q2 had core CPI at 2.7% annualized for Q4 2026 and 2.9% for Q3. That implies a cooling path into year-end, not an acceleration. Realised Q3 was around that path or below it. Source: https://www.philadelphiafed.org/surveys-and-data/real-time-data-research/spf-q2-2026 - [2026-09-16] The shelter distortion is already partly in the y/y numbers and does not recur in the Nov 2026 flow. BLS says the October 2025 rent carry-forward effects "resolve" in April 2026 when the panel was re-collected. So Oct/Nov 2026 shelter growth should be a normal 0.3% a month or so, not a catch-up. Shelter's 0.39% in Sept (earlier reports) was above that normal pace and may fade. This is my inference from the BLS FAQ. Source: https://www.bls.gov/cpi/additional-resources/2025-federal-government-shutdown-impact-cpi-faq.htm - [2026-09-16] The Oct 2026 y/y rate is not published for most series. BLS says it will not publish Oct 2026 12-month changes where Oct 2025 indexes are missing. This leaves no October y/y checkpoint, so core y/y can only be read in Nov. The same page confirms that Nov 2025 survey prices were compared with carried-forward Oct prices. Source: https://www.bls.gov/cpi/additional-resources/2025-federal-government-shutdown-impact-cpi-faq.htm - [2026-09] Shutdown-delay extension risk is low but not zero. The CR funds the government through Dec 11, one day after the Dec 10 release. A lapse would begin Dec 12, after the CPI date. Even so, a Dec 11 lapse would not hit the Nov CPI release. Delay is therefore unlikely to alter the outcome, and it gives YES no extra time. Source: https://www.congress.gov/crs-product/R49353 - [2026-10] A funding lapse after Dec 11 is possible but irrelevant to the Dec 10 data. Holland & Knight says a partial shutdown remains possible. Source: https://www.hklaw.com/en/insights/publications/2026/10/beyond-the-midterms-congress-faces-converging-year-end-deadlines - [2025-12] Nov 2025 collection ran only Nov 14–30. Morningstar noted that goods prices typically fall from mid-November as holiday sales start. Late-month sampling could have biased the Nov 2025 base down (this lifts Nov 2026 y/y, which helps YES). The Nov 2026 data will be collected over the whole month, so holiday discounting will enter at normal weight. If discounting is deeper than normal, that favours NO. Source: https://www.morningstar.com/economy/how-navigate-shutdown-affected-november-cpi-report - [2026-10-14] Rounding favours NO at the margin. The strike needs a 3.0% print, and 2.9% resolves NO. The central estimate from my arithmetic (about 2.8–2.9% under 0.25% a month) sits just below the line. The earlier reports' Trading Economics model also sees about 2.8%. Source: https://tradingeconomics.com/united-states/core-inflation-rate BOTTOM LINE: NO is the status quo: core is 2.6% now and needs about 0.55% over two months (my arithmetic) to print 3.0%. That is only moderately above trend, so NO depends on core cooling back to 0.2–0.25% a month. The weak Nov 2025 base (0.159% over two months) makes this a near-coin-flip tail rather than a long shot. NOT FOUND: A published Oct or Nov 2026 core y/y consensus. The exact Nov 2025 core index level (I used NISA's two-month change). A confirmed fetched read of the NISA page (403). Any post-September-print forecast for core in Oct 2026.