US–China tensions trigger the biggest stock market decline in seven months and reignite inflation fears

Growing tensions between the United States and China have triggered the sharpest stock market decline since April, according to analysts from XTB Romania. The absence of key macroeconomic data, caused by the partial shutdown of U.S. government operations, has heightened concerns about global trade and financial stability.

After a relatively calm period that had fueled substantial gains on U.S. markets, President Biden’s announcement of an additional 100% tariff on imports from China — along with the cancellation of a meeting with President Xi Jinping — reignited friction between the world’s two largest economies. The U.S. administration’s response came after Beijing restricted exports of products containing critical minerals, raising global alarm across industrial and logistics sectors.

Although Washington later adopted a more conciliatory tone, hinting at possible renewed trade talks, markets remained extremely volatile. Following a strong rebound on Monday, U.S. indices fell at Tuesday’s opening before recovering, buoyed by comments from the Federal Reserve Chair suggesting a potential interest rate cut this month.

The situation worsened further as new trade sanctions were introduced. The U.S. division of South Korea’s Hanwha Ocean was targeted by restrictive measures, while China imposed a 400-yuan (around $56) per ton tariff on U.S.-linked vessels arriving in its ports — a retaliatory move against similar U.S. tariffs on Chinese ships.

According to analyst Claudiu Cazacu, the U.S. Treasury’s sharp reaction — describing China’s decision as a sign of economic weakness — highlights the deepening tensions in global trade. While such measures might be manageable individually, their cumulative effect could fuel additional inflationary pressures, as higher transportation costs are likely to be passed on to consumers. A Goldman Sachs study estimates that American consumers will bear more than half the burden of the new tariffs.

Despite the tense climate, a recent World Trade Organization report offered a slightly more optimistic outlook, revising upward its forecast for global trade growth in 2025 from 0.9% to 2.4%, citing the adaptability of supply chains.

Even so, investors remain cautious. The U.S. labor market is showing signs of weakening, and losses in the private credit sector could exceed current estimates. JPMorgan’s CEO warned that private-equity-backed firms operating in the unregulated sector face significant risks, with recent collapses including First Brands and lender Tricolor.

Although JPMorgan and Goldman Sachs both posted better-than-expected quarterly results, their shares fell on Tuesday, suggesting investor concern about a potential economic slowdown.

Amid these uncertainties, gold continues to hit near-daily record highs, reflecting fears over the dollar, inflation, and geopolitical tensions. At the same time, President Trump has threatened to suspend imports of Chinese cooking oil unless Beijing resumes purchases of American soybeans.

Despite these risks, risk appetite remains high, driven by enthusiasm surrounding artificial intelligence and expectations of lower interest rates. However, XTB analysts warn that another wave of U.S.–China trade tariffs could spark increased volatility in financial markets at the beginning of November.