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Stronger Than Expected Core CPI In August With Cross Currents Below The Surface

US DATA
  • Core CPI inflation was stronger than expected in August although with a ‘low’ 0.3% at 0.28% M/M (cons 0.2) after two months of 0.16% M/M.
  • Core goods prices contracted again, with -0.10% after -0.33% M/M but this was driven by a further, albeit smaller than most expected, decline in used cars.
  • Core goods ex used cars increased +0.07% after -0.18% M/M, in part as new cars interrupted a four-month decline with +0.27% M/M. It's not completely surprising considering some reversal of the easing in supply chain pressures.
  • Core services meanwhile accelerated from 0.35% to 0.39% M/M but there are many cross currents under the surface.
  • Rent of shelter slowed from 0.43% to 0.29% M/M for its lowest since Aug’21, although this was amplified by a particularly heavy -3.0% decline in lodging away from home. That’s not to detract from OER moderating to 0.38% M/M after last month’s surprise increase to 0.49% M/M for also its softest since Aug’21, although primary rents partly offset this with an acceleration from 0.42% to 0.48 % M/M.
  • Away from shelter, non-housing core service measures accelerated swiftly. It increased from 0.19% to 0.37% M/M when excluding OER & primary rents (only slightly higher than some had expected), but this included that lodging drag. Core services excluding all shelter meanwhile accelerated from 0.23% to0.52% M/M for its fastest since Sep’22.
  • A clear caveat here is that airfares were a significant driver behind the acceleration, swinging from -8.1% to +4.9% M/M and above most analyst expectations (adding a sequential +0.09pps to overall core CPI in the process). PPI rather than CPI airfares feed into PCE calculations, denting its impact.
  • There are some signs of underlying strength in these supercore measures though, with non-health insurance components of medical care services growing strongly. Professional & hospital services combined increased +0.65% after +0.1% M/M for the fastest pace since Aug’22 and before that Feb’21.
  • Other areas of note: car insurance printed another very strong 2.4% after 2.0% M/M (adding 0.08pps to core CPI), whilst food away from home (excluded from core CPI but a 7% weight in core PCE) bounced from moderating to 0.17% in July back to 0.34% M/M.

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