Domestic experts say the U.S. Federal Appeals Court’s ruling that parts of President Donald Trump’s tariff policy are unlawful will trigger a lengthy legal battle, but companies cannot afford to wait. Many have already prepared contingency measures to meet different regional demands.

Since taking office, Trump has wielded tariffs aggressively against multiple countries, prompting them to send delegations to Washington. According to U.S. Treasury data, tariff revenues reached US$152 billion by July, nearly double the US$78 billion recorded in the same period last year. In August alone, tariffs generated more than US$31 billion, the highest monthly figure on record.

The surge comes as the Federal Appeals Court ruled most of Trump’s tariffs illegal. The administration appealed to the Supreme Court on Sept. 3, requesting an expedited review.

Franklin Templeton Securities Investment Consulting Senior Vice President Lo Yu-mei (羅尤美) said it is difficult to predict how the Supreme Court will rule. She noted that the euro has become the most sought-after currency after the U.S. dollar. If France and Germany step forward, major U.S. and Taiwanese brands could build factories and list shares in Europe, reducing exposure to U.S. policy risks. But with the EU constrained by the Russia-Ukraine war and lacking strong financial leadership, she added, markets may have little choice but to keep watching Trump’s every move over the next three years.