U.S. inflation accelerates in September; third-quarter GDP rises 3.4%

The headline reports that U.S. inflation accelerated in September while third-quarter GDP rose 3.4%, a combination pointing to an economy running hot on both price and output growth. The transmission channel is inflation repricing: firmer price data raises the likelihood that the Federal Reserve keeps policy restrictive for longer, lifting expected real yields and widening the rate differential that supports the dollar. Rate-sensitive assets are most exposed, particularly long-duration Treasuries, where yields tend to move higher as markets pare back expectations of near-term rate cuts, and growth-oriented equities whose valuations are discounted more heavily at higher rates. The strong GDP print partly offsets the inflation concern by signaling resilient demand, which may support cyclical sectors and credit spreads even as borrowing costs remain elevated. The next catalyst to watch is the upcoming Personal Consumption Expenditures (PCE) price index release, the Fed's preferred inflation gauge, which will show whether the September acceleration is confirmed in the Fed's preferred measure.

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