Stock market today: Dow, S&P 500, Nasdaq tumble as rising yields, Trump tariff uncertainty rattle markets

US equities experienced a broad decline on Tuesday, marking a challenging start to September, primarily driven by rising Treasury yields nearing key resistance levels and increased uncertainty surrounding the legal status of Trump-era tariffs. Investors are keenly focused on upcoming jobs data, which will heavily influence Federal Reserve rate cut expectations. Notable individual stock movements included Nvidia's decline following clarifications on AI chip supply and Tesla's fall due to demand concerns, while gold rallied on rate cut hopes and PepsiCo gained from activist investor interest.

Analysis

U.S. equity markets began September with a broad-based decline, as the S&P 500 and Nasdaq Composite fell approximately 0.7% and 0.8% respectively, driven by a confluence of macroeconomic pressures. A significant headwind was the rise in Treasury yields, with the 30-year yield (^TYX) climbing 5 basis points to 4.97%, approaching the critical 5% level, while the 10-year yield (^TNX) neared 4.3%. This bond sell-off was exacerbated by political and legal uncertainty after a federal appeals court ruled most of the Trump administration's global tariffs unconstitutional, creating ambiguity around a key revenue stream and potential fiscal implications. Despite this risk-off sentiment, markets are pricing in a 90% probability of a Federal Reserve rate cut in September, an expectation bolstered by a sixth consecutive month of contraction in U.S. manufacturing. This divergence fueled a rally in Gold (GC=F) to a new all-time high of around $3,600 an ounce. In the technology sector, Nvidia (NVDA) shares fell roughly 2% after the company refuted media reports of its AI chips being “sold out,” even as its 56% Q2 data center revenue growth missed elevated Wall Street expectations. Corporate-specific events provided pockets of strength, with PepsiCo (PEP) jumping 5% on news of a $4 billion activist stake by Elliott Management and Kraft Heinz (KHC) rising on plans to split into two separate companies.

Key Decisions for Investors

• Given rising Treasury yields approaching key resistance levels and significant uncertainty surrounding tariff legality, investors should remain cautious and closely monitor Friday's August jobs report, as it will be a pivotal data point influencing the Federal Reserve's rate-cut decision.
• The pullback in AI-related stocks like Nvidia (NVDA) and CoreWeave (CRWV), stemming from valuation fears and supply-chain questions, presents a complex picture; consider a selective approach, as near-term volatility may offer entry points for long-term believers in the AI thesis, but be wary of broader sector froth.
• Pay close attention to idiosyncratic, company-specific catalysts that are driving performance contrary to the broader market, such as the activist investor stake in PepsiCo and the planned breakup of Kraft Heinz, as these situations may present event-driven opportunities.