On Tuesday local time, U.S. Republican presidential candidate Donald Trump once again wielded the tariff threat stick at a rally, drawing global market attention. He declared that if he wins the November 5 election, the EU would pay a huge price for failing to purchase enough U.S. exports. This statement not only escalated U.S.-Europe trade tensions but also cast a shadow over global economic prospects.

At the rally, Trump elaborated on his tariff plan, stating that if elected, he would impose tariffs of 10% to 20% on imports from all countries, with tariffs as high as 60% on certain Chinese imports. The plan aims to protect U.S. industries and reduce reliance on foreign-made goods but has also raised widespread concerns. Economists warn that Trumps tariff policies could severely disrupt global supply chains, trigger trade retaliation, and ultimately drive up global costs, damaging international trade relations.

On the same day, Trumps Democratic opponent, Kamala Harris, sharply criticized his tariff plan at a large rally in Washington. Addressing tens of thousands, Harris called Trump an unstable person obsessed with revenge, grievances, and unchecked power. She emphasized that tariff threats would not solve trade deficits but instead worsen international tensions and harm U.S. consumers and businesses.

In fact, Trumps tariff threats have already impacted European markets. This year, European stocks have underperformed U.S. stocks, partly due to concerns over Trumps potential policies. Analysts worry that European exporters will face higher costs and reduced competitiveness, while U.S. firms may benefit from Trumps tax cuts, widening the U.S.-Europe market gap.

Since late September, Barclays basket of European stocks vulnerable to U.S. tariffs has fallen 7%. The basket includes 28 major European firms like Diageo, LVMH, and Volkswagen, many of which derive over 30% of revenue from the U.S., including Daimler Truck, Arkema, and Diageo.

Meanwhile, Hugh Gimber, global market strategist at J.P. Morgan Asset Management, noted that European stocks now trade at a 40% discount to U.S. markets, reflecting trade conflict fears. This negativity seems priced in, Gimber said, adding that a Trump win could further pressure European profits, increase uncertainty, and trigger capital outflows.

European market weakness has dented investor confidence and pressured the broader economic outlook. Lutz Brand, head of Germanys Federal Statistical Office (Destatis), stated that despite external challenges, Germany is striving to maintain growth. We are supporting key industries to ensure sustained growth, Brand said, though she acknowledged trade uncertainty as a major challenge.

Europes auto sector is particularly vulnerable. As a key economic pillar, auto exports are critical to Europes economy. Trumps tariffs could raise costs and competition for European automakers, hurting profits and jobs, with broader socioeconomic ripple effects.

Amid growing trade complexity, Trumps threats heighten dispute risks. Rising protectionism could fracture global trade systems, challenging international cooperation. Economists urge multilateral talks to ensure fair, open, and non-discriminatory trade, avoiding tariff wars to sustain global stability.

Moreover, interconnected supply chains mean one countrys tariffs can ripple globally. Firms must adapt supply chains, diversify risks, and enhance resilience. Financial tools like futures and options will also grow in managing trade risks.

Overall, Trumps tariff threats have strained U.S.-Europe trade and clouded global economic prospects. Governments and businesses must monitor developments, respond proactively, and boost competitiveness through diversification and innovation. Only cooperation can resolve disputes, foster healthy growth, and ensure shared benefits in globalization.