U.S. business activity expanded at a slower pace in September, highlighting cooling demand and easing inflation pressures just as the Federal Reserve moved to cut rates. The data suggest that while growth remains intact, momentum is waning, leaving investors to weigh opportunities in bonds and defensive equities against risks of weaker corporate earnings and persistent tariff-related cost pressures.Growth Momentum SlowsThe S&P Global Flash U.S. Composite PMI slipped to 53.6 in September from 54.6 in August, the weakest reading in three months but still above the 50 threshold signaling expansion.Both manufacturing and services reported softer gains, pointing to a loss of momentum from the July peak. Companies also scaled back hiring, citing weaker demand conditions, suggesting the labor market may be entering a cooler phase that could slow household spending later this year.Inflation Signals Improve Despite Tariff HeadwindsA notable feature of the report is that firms’ selling prices increased at the slowest pace since April. This deceleration indicates that businesses are losing pricing power, even as tariffs keep input costs elevated.The result is margin compression for corporates, but a potential easing of inflationary pressures for the economy. For the Fed, this offers breathing room after its first rate cut of 2025, reinforcing expectations of a gradual policy-easing cycle if disinflation continues.Market Implications Across AssetsThe survey results carry distinct signals for different asset classes:Equities: Slower demand and weaker hiring raise downside risks for cyclical sectors such as industrials and consumer discretionary. Defensive sectors—healthcare, utilities—may gain relative strength.Bonds: Lower pricing pressures support Treasuries, with yields likely to drift lower if labor market softening confirms disinflation.Commodities: Input cost pressures remain due to tariffs, but weaker demand caps upside for oil and industrial metals.FX: The dollar faces a balancing act—Fed easing pressures it lower, while tariff-linked safe-haven flows may provide support.Key Economic SnapshotIndicatorSeptemberAugustImplicationComposite PMI53.654.6Slowest growth in 3 monthsHiring MomentumSlowedSteadyLabor market coolingSelling Price InflationWeakest since Apr.ModerateSupports disinflationInput CostsRising (tariffs)RisingMargin compressionFed PolicyRate cutOn holdEasing bias confirmedThe September PMI reinforces a mixed macro backdrop: cooling inflation supports the Fed’s pivot toward easing, but slowing growth and squeezed margins temper optimism.Actionable TakeawaysOpportunities: Bonds and defensive equities stand to benefit if disinflation persists.Risks: Weaker demand and tariff-driven costs could weigh on earnings, especially in export-sensitive and cyclical sectors.Strategy: Investors should position for a dual environment of moderating inflation and slower growth, emphasizing quality assets and maintaining hedges against tariff shocks.