Third-quarter U.S. GDP increases a better-than-expected 3.4% as September inflation accelerates

Third-quarter U.S. GDP grew at an annualized rate of 3.4%, exceeding expectations, while September inflation accelerated, according to the headline. The combination points to an economy running hotter than forecasters anticipated, which raises the risk that the Federal Reserve keeps policy restrictive for longer rather than easing on the schedule markets had priced. The transmission runs through the rate channel: stronger growth paired with rising inflation pushes up Treasury yields, particularly at the front end and intermediate maturities, and tightens financial conditions for rate-sensitive assets. Long-duration equities, housing-linked stocks, and small-cap indices that carry more floating-rate debt are typically most exposed to this repricing, while the U.S. dollar tends to firm against currencies whose central banks are closer to easing. The next catalyst to watch is the October Consumer Price Index release, since its core reading will determine whether the inflation acceleration is persistent enough to validate a higher-for-longer path.

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