On Tuesday, U.S. stock markets began September on a fragile note, with major indices posting steep declines amid renewed concerns about rising Treasury yields and the fate of former President Donald Trump’s contested tariffs. Investors, already wary as they entered what has historically been the most volatile month for U.S. equities, found little solace amid a confluence of negative headlines and persistent economic uncertainty.

Indices Retreat as Treasury Yields Surge

The Dow Jones Industrial Average sank by approximately 250 points (down 0.6%), while the S&P 500 dropped by 0.7%—its worst single-session performance in over a month. The tech-heavy Nasdaq Composite fell around 0.8%. Losses came despite stocks clawing back from session lows as traders assessed several major macro and policy risks.

This slide followed an extended winning streak for Wall Street, which had notched gains across July and August. However, those rallies gave way to mounting concerns that higher-for-longer interest rates and policy uncertainties could disrupt the bullish momentum.

The pressure on equities stemmed in large part from the bond market. The yield on the 30-year U.S. Treasury note jumped five basis points to near 4.97%, approaching the psychologically significant 5% threshold for the first time since July. The 10-year yield also climbed to around 4.3%. Higher yields increase borrowing costs for businesses and households, and tend to weigh particularly hard on expensive tech names by diminishing the present value of future earnings.

Key Economic Data Looms: All Eyes on Jobs Report

Traders reacted not only to interest rate dynamics but also to a battery of critical upcoming economic releases. The August nonfarm payrolls report, due on Friday, is seen as a pivotal event that could sharpen expectations for whether the Federal Reserve will move ahead with an interest rate cut at its next meeting.

Market odds, as tracked by CME FedWatch Tool, currently price in about a 90% probability of a 25 basis point rate cut in September. However, the outcome could hinge on jobs data and earnings figures. Recent reports show U.S. manufacturing contracted for a sixth consecutive month in August—a worrisome signal about the durability of American industrial recovery.

“While easing inflation is encouraging, a softening labor market and persistent manufacturing contraction introduce new risks,” said Anne Holloway, senior strategist at MarketWatch Advisors.

Nvidia and Tech Leaders Under Pressure Amid Supply Chain Doubts

Market jitters extended sharply into the technology sector. Nvidia (NVDA) stock led declines among the “Magnificent Seven” big-cap tech stocks, losing approximately 2% after pushing back on media reports alleging that its sought-after AI chips were “sold out.” In a statement on X (formerly Twitter), Nvidia insisted that supply for its flagship H100 and H200 processors remained steady and that rumors about critical shortages and order delays were unfounded.

This public relations push followed CEO Jensen Huang’s own comments last week, when he nodded to persistent speculation about supply constraints. Although Nvidia’s quarterly data center revenues rose 56% year-over-year, they fell short of Wall Street’s most aggressive forecasts, rekindling doubts about the durability and scalability of AI-fueled growth.

“Demand for Nvidia’s AI chips is extraordinary, but it’s exposing limits within the global semiconductor supply chain,” noted Lisa Anderson, principal at TechMarkets Insights. “Any hiccup in Nvidia’s fulfillment or rumors thereof can lead to outsized reactions in tech stocks.” Other chipmakers and cloud providers, including AMD and Microsoft Azure, also traded lower as investor sentiment soured on AI momentum in the near term.

Trump Tariffs in Legal Turmoil Add to Market Uncertainty

Layered atop rate and earnings anxieties is fresh political risk from the White House and judiciary. Markets were rattled after a federal appeals court ruled most of the global tariffs imposed by former President Trump were unconstitutional. The court found Trump had exceeded his authority in dramatically raising duties under emergency powers. While tariffs will remain temporarily in place pending appeal, the former president immediately vowed to seek an emergency hearing from the Supreme Court, labeling the case “an economic emergency.”

“If we don’t win that decision, you’ll see a reverberation like maybe you’ve never seen before,” Trump warned in media appearances, directly citing tariff-related uncertainty as a factor behind market weakness. Investors and corporate leaders remain deeply concerned about the strategic implications for U.S.-China trade, supply chains, and manufacturing competitiveness should the tariffs be struck down or dramatically altered.

Washington’s legal theater was amplified further by developments at the Federal Reserve. A high-profile court hearing over whether Trump, if re-elected, could remove Fed Governor Lisa Cook and reshape the central bank’s leadership ended without resolution, fueling debate about the future independence of U.S. monetary policy.

Gold Hits New Highs as Global Uncertainties Rise

Amid this turbulence, gold prices briefly topped $3,600 an ounce, touching fresh all-time highs. The surge was fueled by expectations that the Fed may be forced to cut rates in the near term, and by a renewed search for safe-haven assets as equity and currency volatility increased. Many institutional investors, especially global funds, are shifting more allocation to gold and bonds as a hedge against both economic and geopolitical risks.

Outlook: Choppy Trading Ahead as Policy Risks Dominate

With September’s rocky start, analysts forecast further volatility as markets contend with unresolved policy issues, a complex macroeconomic backdrop, and renewed legal drama from Washington. Uncertainty around the jobs report, the trajectory of yields, and the legal path for Trump-era tariffs all stand to sway risk sentiment in the coming sessions.

For investors, navigating September’s historic headwinds may require defensive positioning and close scrutiny of policy signals from the Fed, Congress, and the courts.