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US Q3 2026 Core CPI YoY Rebounds to 2.6%; Sticky Inflation Touches a Nerve with the Fed

2026-10-15

According to the latest data, the US Q3 2026 core CPI YoY rate rose to 2.6%, showing a rebound from the previously observed 2.4% and coming in higher than the market consensus of 2.5%. Core CPI, which excludes volatile food and energy components, is a crucial indicator for the Federal Reserve to measure long-term inflation. The unexpected rise in this data has shattered the market's previous optimistic expectations for sustained disinflation, demonstrating that inflation stickiness still persists.

Looking at key components, persistently high service prices are the crux of the re-accelerating core inflation. Among them, housing costs, which hold a large weight, saw their monthly gain widen to 0.4%, up from 0.3% in the previous month. Meanwhile, transportation service prices increased by 0.6% month-over-month, marking the largest increase in six months, indicating that surging energy prices have begun to transmit to the logistics and transportation end markets. In addition, healthcare services turned from negative to positive, rebounding to 0.3%.

Regarding this data rebound, research institutions such as XTB pointed out that inflationary pressure is broadening, with over half of the price basket components experiencing annualized growth, and underlying price pressures are more persistent than expected. Analysts generally believe that the recent rise in energy costs has created a spillover effect, making the disinflationary momentum of core inflation exceptionally fragile and difficult to fall back to the Federal Reserve's target range of 2% in the short term.

Looking ahead to the short term (1-2 months), the rebound in core inflation will significantly increase the probability of the Federal Reserve maintaining or even strengthening its restrictive monetary policy. The market may once again face pressure from interest rate hikes or delayed rate cuts, which could trigger a rise in US Treasury yields and a stronger US dollar. In the medium term (3-6 months), if housing and transportation costs fail to cool significantly, the high-interest-rate environment will be prolonged. Investors need to be wary of the downside risks to the valuations of tech stocks and the semiconductor sector brought about by persistently high cost of capital, and closely monitor the impact of geopolitics on future prices.

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