Last Week's RecapU.S. Market - Stalled at Record HighsIndexes: Stocks started the week at record highs, fueled by optimism over the Nvidia–OpenAI deal. But that early strength faded as the week wore on, leaving the S&P 500 down 0.31% and the Nasdaq off 0.65%, snapping a three-week winning streak.Inflation: August’s PCE inflation reading landed right on expectations (headline +2.7% y/y; core +2.9%), reinforcing the picture of inflation that’s sticky but not accelerating—enough to keep the Fed on its toes, but not enough to derail easing expectations.Powell Speech: Powell (Sept. 23) doubled down on a data-dependent approach. His remarks on economic challenges and stock valuations added to market volatility.Tariffs: President Trump announced new tariffs, including 100% duties on patented