Wall Street indexes end lower as investors weigh Powell comments

Market Overview - U.S. stock index futures remained largely unchanged as Wall Street reached record closing highs for three consecutive sessions, driven by a tech rally [1] - The S&P 500 index saw a 3.6% increase in September, a month typically weak for equities, as traders navigated uncertainties around President Donald Trump's policies [4] Federal Reserve Insights - Federal Reserve Chair Jerome Powell's upcoming remarks are anticipated to influence interest rate expectations amid mixed signals from the Fed regarding inflation and labor market pressures [1][2] - Newly appointed Fed Governor Stephen Miran warned against over-tightening, which could negatively impact the labor market [2] Economic Indicators - The September reading of S&P Global's flash manufacturing PMI is expected to be released, with additional comments from Fed officials being closely monitored [3] Technology Sector Performance - The resilience in the market is attributed to strong performance in technology stocks and renewed optimism surrounding artificial intelligence [5] - Nvidia, a leader in AI chips, experienced a 0.7% decline in premarket trading after reaching an intraday record high, following a significant investment agreement with OpenAI [5] Visa Regulations Impact - Investors are cautious about potential disruptions from H-1B visa regulations affecting U.S. technology companies that depend on skilled labor from India and China, although mega-cap stocks have largely remained unaffected [6] Company Specific Movements - Kenvue, the Tylenol maker spun off from Johnson & Johnson, saw a nearly 6% rise in premarket trading after recovering from a previous 7.5% drop, which had made it the worst performer on the S&P 500 [6]