U.S. stocks finished lower on Wednesday as hotter-than-expected PCE inflation data reignited concerns that the Federal Reserve may keep interest rates higher for longer. The S&P 500 declined as traders digested sticky price pressures and prepared for Nvidia’s earnings report after the closing bell — one of the most closely watched events of the quarter.Key Market MovesThe S&P 500 slipped amid broad weakness in rate-sensitive sectors. Technology and growth stocks faced particular pressure as bond yields edged higher on the inflation print. Traders noted that while core PCE held relatively steady, the headline figure ran hot, reinforcing the narrative of persistent inflation that has complicated the Fed’s path toward potential rate cuts.Market participants are now pricing in elevated rate-hike (or delayed-cut) risks heading into the final days of August. The combination of sticky inflation and an imminent mega-cap earnings catalyst has created a cautious tone across equity desks.Nvidia Earnings: The Next Major TestAll eyes turn to Nvidia after the close. As the dominant force in AI infrastructure, Nvidia’s results and forward guidance often set the tone for the entire technology sector and the broader S&P 500. Traders will focus on:Data center revenue growth
Gross margin trends
Commentary on AI demand sustainability
Any updates on supply constraints or customer spending plans
A strong report could spark a relief rally and help the index recover recent losses. Conversely, any sign of slowing momentum may amplify downside pressure, especially with inflation already weighing on sentiment.What Traders Are Watching NextFriday brings additional focus with remarks from Kevin Warsh, adding another layer of policy-related volatility. Between Nvidia’s numbers and the upcoming comments, the market faces two significant tests in a short window.Key levels traders are monitoring on the S&P 500 include recent support zones that held during the morning dip and resistance near the prior session highs. Elevated implied volatility around Nvidia suggests the potential for sharp moves in both directions once the report hits.Bottom Line for TradersSticky inflation has raised the stakes for rate-sensitive assets and increased the importance of Nvidia’s guidance. Positioning remains cautious ahead of the dual catalysts. Risk management remains critical — position sizes, stop levels, and exposure to high-beta tech names should be reviewed carefully in this environment.The coming sessions will likely determine whether the recent pullback is a brief pause or the start of a deeper consolidation phase driven by macro and earnings uncertainty.