US stocks: US stocks notch monthly declines on combined AI, tariff, geopolitical uncertainty

Market Overview - All three major indexes ended lower, with the Dow logging its biggest weekly drop since November, driven by uncertainty over costs and disruptions related to artificial intelligence, revived tariff uncertainties, and geopolitical tensions [1][5] - The S&P 500 lost 30.49 points (0.44%) to close at 6,878.91 points, the Nasdaq Composite fell 204.74 points (0.92%) to 22,673.65, and the Dow Jones Industrial Average decreased by 521.69 points (1.05%) to 48,977.51 [5] Earnings and Corporate Performance - Corporate America is projected to see over a 14% gain in earnings for the fourth quarter, indicating a strong earnings season despite market volatility [2][5] - Financial stocks experienced declines due to concerns over potential losses related to the collapse of UK mortgage provider Market Financial Solutions Ltd, affecting banks like Barclays, Jefferies, and Wells Fargo [5] Sector Performance - Defensive sectors such as consumer staples, healthcare, and utilities outperformed during the session, indicating a risk-off environment where investors are favoring stability over growth [4][5] - Tech shares continued to decline, with concerns over AI impacting chip and software stocks, including Nvidia, which extended its previous drop despite solid earnings [5] Economic Indicators - A hotter-than-expected Producer Price Index reading has reinforced expectations that the U.S. Federal Reserve is unlikely to cut interest rates in the near term [5] - The market is experiencing a shift, with defensive areas gaining strength while cyclical growth sectors lag [5] Company-Specific Developments - Zscaler reported a wider net loss in the second quarter, leading to a significant drop in its stock price [5] - Netflix's stock rose after its decision to exit the competition for Warner Bros Discovery, while Paramount Skydance, the likely buyer, saw its shares close sharply higher [5] - Block's stock surged after announcing it would cut nearly half its workforce to integrate AI into its operations [5] - Dell's shares increased after the company projected that revenue from its AI-optimized servers business would double by fiscal year 2027 and promised to return more cash to shareholders [5]