Reading US CPI data when the annual rate is missing

What does a US CPI print measure?

CPI tracks how the price of what US households buy changes. A release gives two readings of that change: how far prices moved since the previous month, and how far they moved since the same month a year earlier.

The monthly reading is the fresh one. It shows whether prices are speeding up or slowing down now. The annual reading smooths twelve months into one figure, which is why newspapers lead with it and why a single hot month rarely moves it far.

Core CPI is the same measure with food and energy taken out. Those two swing with weather and oil, so core is the cleaner read on the trend underneath.

How does a monthly number turn into an annual one?

An annual rate is twelve monthly changes multiplied together. Each month's percentage applies to the level the month before left behind, so the changes compound rather than add.

Here is the arithmetic on the two published months. September 2026 rose 0.6 percent and October rose 0.4 percent, per Reuters. Multiply the two: 1.006 × 1.004 = 1.010024. Two months moved the price level up about 1.0 percent.

Now stretch October's pace over a full year. 1.004 compounded twelve times is 1.0490, or 4.9 percent. That is what a year would read if every month matched October. It is arithmetic on one month, not a forecast of any month.

The same sum shows why the annual number needs a base month. To say prices rose X percent in a year, you divide this October's level by October of last year. If last year's October level does not exist, the division has nothing under it.

Source: Reuters via The Economic Times, https://economictimes.indiatimes.com/markets/us-stocks/news/us-consumer-prices-rise-above-expectations-in-october/articleshow/135712897.cms, read 11 November 2026.

Why did the October 2026 report arrive without an annual rate?

The BLS did not publish year-over-year readings because the 2025 federal government shutdown prevented it from collecting consumer prices in October 2025. That left no comparison base, per Reuters.

Bloomberg, as reported by Quartz, adds that the shutdown stopped the BLS from gathering some of its October 2025 prices, and the agency never recovered part of that information later. A BLS spokesperson told Bloomberg the gap leaves the agency unable to calculate the 12-month change for either headline CPI or core CPI. The separate release on real earnings growth over the year was also not published.

The missing number is a hole in last year's data. The last annual figure the BLS published was 3.7 percent for the 12 months to September 2026. That was up from 3.4 percent for the 12 months to August, and core stood at 2.6 percent.

Sources: Reuters via The Economic Times (link above), read 11 November 2026. Quartz, https://qz.com/bls-skip-12-month-cpi-october-inflation-report-110926, updated 9 November 2026 and read 11 November 2026.

Which parts of the report still carry information?

Four readings survive the gap, and an allocator can read the release from them.

The monthly headline

Consumer prices rose 0.4 percent in October 2026, after 0.6 percent in September. Economists polled by Reuters had forecast 0.3 percent. The miss is 0.1 percentage point, and the September figure shows the pace was already fast.

Core CPI

Core rose 0.3 percent in October, after 0.3 percent in September. The forecast was 0.2 percent. Core holding at 0.3 for two months says the pressure reaches past oil, a reading the headline alone cannot give.

The Fed's own gauge

Reuters reports that the missing data have no effect on the Personal Consumption Expenditures price index, the measure the Fed tracks against its 2 percent target. Both the PCE and CPI measures were running above 3 percent.

The last annual rate and what a flat month would have done

StockTitan worked from BLS index levels as of 6 November 2026. It calculated that an October with no price change before seasonal adjustment would leave prices 3.8 percent above the average of the September and November 2025 levels. That is its own estimate, not a BLS figure, and it sits above September's published 3.7 percent.

Sources: Reuters via The Economic Times (link above). StockTitan, https://www.stocktitan.net/articles/october-2026-cpi-preview-no-yearly-rate, read 11 November 2026.

How does a US print reach an Indian portfolio?

A US inflation print reaches India through the rate the Federal Reserve is expected to set, not through any Indian price index. Reuters reported that early on 10 November 2026 markets fully priced a 25 basis point hike at the Fed's December 2026 meeting. The Fed's benchmark overnight rate stood in the 3.75 to 4.00 percent range at that point. A basis point is one hundredth of a percentage point, so 25 basis points is 0.25 percent.

Reuters also quoted economists saying only a substantial equity sell-off or widening credit spreads would stop the Fed tightening in December. A hotter print changes how sure the market is, and the Indian session that follows shows the change through the dollar, US yields and risk appetite.

The channel is the one traced in how a Fed rate hike reaches an Indian portfolio. The print is an input to the expected rate. The rate then moves the dollar, and anything priced in dollars costs more rupees.

What does a rule decided before the print do with it?

A schedule fixed in advance does not wait for the print to read cooler. Take ₹25,000 on the same date each month. Over twelve months that is ₹25,000 × 12 = ₹3,00,000 deposited, and the date was set before either the September or October release existed.

Qatobit builds its indexes on that principle. Each index is rebalanced monthly by Qatobit on a published methodology, so the investor makes one decision about the thesis and the horizon, and the schedule does the rest. Nothing is charged for leaving, on any index, at any holding period, which means a view changed by the data can be acted on without an exit penalty.

A missing annual number changes how a report is read and gives no reason by itself to change a position. Read the monthly pair and core, check which way the expected rate moved, and notice whether your plan depended on the print at all. If it did, the plan was a forecast about the print.

Where to read further

The Indian counterpart is covered in what India's monthly CPI counts. The currency side is in what US CPI data does to the rupee price of your crypto. The Indian rate is in what a repo rate hike passes through to a portfolio.

Frequently asked questions

Why did the October 2026 US CPI report have no annual rate?

The 2025 federal government shutdown stopped the BLS collecting consumer prices in October 2025, so there is no October 2025 base to compare against. Reuters and Bloomberg both report that the BLS did not publish year-over-year readings for headline or core CPI.

What did US CPI rise by in October 2026?

Consumer prices rose 0.4 percent in October 2026 after 0.6 percent in September, per Reuters. Economists had forecast 0.3 percent. Core CPI rose 0.3 percent against a forecast of 0.2 percent.

What was the last annual US CPI rate before the gap?

The BLS published 3.7 percent for the 12 months to September 2026, as reported by Quartz citing Bloomberg. That was up from 3.4 percent for the 12 months to August, and core stood at 2.6 percent.

Does the missing data affect the Fed's inflation gauge?

No. Reuters reports the missing October 2025 data have no effect on the PCE price index the Fed tracks against its 2 percent target. Both measures were running above 3 percent.

How does a US CPI print reach Indian markets?

It reaches them through the expected Fed rate, then through the dollar, US yields and risk appetite. As of 10 November 2026 Reuters reported markets fully priced a 25 basis point hike for December 2026, which is 0.25 percent.

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