Tariff War Intensifies: Navigating Challenges and Opportunities in a Changing Global Economy

After President Donald Trump began his second term, he swiftly escalated the trade war by imposing a 25% import tariff on steel and aluminium products, along with ‘reciprocal tariffs.’ Dr. Jing Li, Deputy Program Director of International Business and Global Management at HKU Business School, said although Trump aimed to attract manufacturing back to the…


Since the beginning of American President Donald Trump’s second term in the White House, a new round of trade war has unfolded on a full scale. As of March 2025, not only has a 25% tariff been imposed on imported steel and aluminium, but targeted tariffs have also been implemented on major trading partners such as China, Canada, and Mexico, further escalating global trade tensions. In the face of America’s increasingly hard-line trade protectionist policy, the EU, Canada, China, etc. are attempting to alleviate the tariff pressure through litigation, negotiations, and countermeasures. However, the US has gone beyond these actions. On 26 March 2025, Trump announced that, effective on 2 April, all imported automobiles will be subject to a 25% tariff and plans are under way to impose the same tariff on non-American components of vehicles assembled on US soil, starting one month later. In addition, the “reciprocal tariffs” implemented simultaneously will step up the trade war.

In the wake of Trump’s first term as US President, tariffs were already at the core of his economic strategy. He firmly believes in them as a tool to boost domestic manufacturing and employment, framing tariffs as an important means of “Making America Great Again”. However, in actual fact such a policy has triggered grave concerns and adverse impacts around the world. Classical economic theories have long demonstrated that tariff hikes will hinder economic growth through various channels. First, tariffs will raise import costs, directly undermining consumer interests and weakening their purchasing power, in other words, compromising the overall consumption power. Second, rising import costs will also drive up production costs for domestic enterprises, implicating related industries through supply chains, and thereby leading to diminishing output. Subjecting American companies to liquidity pressure, this can even set off a chain reaction that affects the entire investment environment. Nonetheless, Trump remains convinced that the economic benefits derived from tariff-hike pressure will outweigh potential losses. Meanwhile, with the continued escalation of the trade war, companies and consumers in the US and around the world will face even greater harm.

Increased tariffs: a source of enemies on multiple fronts

The reciprocal tariffs are introduced by the US to escalate the trade confrontation from a bilateral to a multilateral one. In response to Trump’s non-discriminatory tariff policy, national governments and multinational companies are reassessing the trade landscape  and their respective investment strategies for the medium to long term. The new “reciprocal tariff” measures will not only take into account the tariff levels imposed by other countries on the US, but will also comprehensively consider the amount of subsidies provided by each country for its industries as well as any potential unfair trade practices from the US perspective. This goes to show that the so-called “reciprocal tariffs” are actually trade rules redefined based on American interests, particularly business interests. The imposition of these tariffs will no doubt be met with countermeasures from the rest of the world. Besides further intensifying uncertainties in the global economy, this will expose the US economy to even greater challenges.

History does not repeat itself but the similarities are astonishing. America’s well-known Smoot-Hawley Tariff Act in 1930 was a radical move at trade protectionism. To resolve domestic overcapacity, protect domestic industries, and aid farmers in hardship, the Act raised duties to a record high on more than 20,000 imported goods. Following the passage of the Act, retaliatory tariff measures by other nations dealt a serious blow to the US economy, resulting in a nearly two-thirds reduction in US imports and exports during the Great Depression. Despite the lack of hard evidence that retaliatory tariffs were the direct cause of the Great Depression, the pressure these tariffs exerted on the US market and the numerous disputes surrounding the Act were undoubtedly a catalyst for the severe economic recession in the US.

Today, Trump is still trying to create national wealth by raising tariffs to tackle a string of domestic economic problems, including employment. Nevertheless, judging by the tariff strategy during his first term, punitive tariffs this time are unlikely to achieve any significant effect. As it has turned out, this protectionist policy often backfires. The negative effects of the trade war, including inflation and investment uncertainty, will harm both American individuals and companies. The tariff war has been expanding since Trump’s second term began. If the reciprocal tariffs are implemented as scheduled, the new tariff regime will remain a threat issued by Trump to fight for national interests, and the expected countermeasures by other countries will also plunge the US economy into a predicament similar to that caused by the Smoot-Hawley Tariff Act.

China seeking international allies to break deadlock

2024 trade data shows that China, the EU, Mexico, Vietnam, and Taiwan were the top five export partners with the largest trade deficits with the US. Given that China has been levied an additional 20% tariff since the start of Trump’s second term, under the framework of reciprocal tariffs, China is unlikely to sustain any further impacts. Subject to the upcoming announcement by the US government on 2 April 2025, the details of tariff implementation warrant close attention.

Furthermore, unlike the trade war initiated in 2018, the current tariff hike is obviously not just targeted at China but also affects many other countries, including several American allies. Hence, to control trade costs, companies around the world will need to adopt different approaches to their investment strategies.

During the China-US trade war, numerous enterprises would choose to cooperate with Vietnam, Mexico, etc to bypass the US duty increases placed on China. In contrast, this business strategy may be much less effective for Trump’s upcoming tariff measures, leading to skyrocketing uncertainties in the investment environment and making “exiting” China not the best approach to evade rising tariffs. Enterprises now need to reassess their international investment strategies and previous decisions about investing in China to address the latest changes in the global trade landscape.

In response to the US protectionist policy, countries worldwide will proactively seek new  opportunities for international cooperation. This reflects efforts to overcome the US tariff barriers, ease pressures from the trade war, and safeguard their economic benefits and growth potential.

Against this backdrop, China should capitalize on current international cooperation opportunities and strive to develop mutually beneficial collaborations. In particular, in the domains of trade, investment, and technological innovation, China can further pursue such mechanisms as the Regional Comprehensive Economic Partnership (RCEP), which will be instrumental in cementing closer partnerships.

Through deeper international cooperation, not only can China strengthen its influence in the world economy, but it can also significantly contribute to an open, diverse, and mutually beneficial global economic order.

Translation
自美國總統特朗普(Donald Trump)二次執政以來,新一輪貿易戰已全面展開。從2025年3月起,美國不僅對全球鋼鐵和鋁産品徵收25%的進口關稅,還對中國、加拿大、墨西哥等主要貿易夥伴實施特定關稅,進一步加劇全球貿易緊張局勢。面對美國日益強硬的貿易保護主義政策,歐盟、加拿大和中國等透過訴訟、談判和反制措施試圖緩解關稅壓力。然而,美國並未止步於此。3月26日,特朗普宣佈從4月2 日起對所有進口到美國的汽車加徵25%的關稅,並計劃在一個月後對美國組裝汽車中的非美國零部件徵收同等關稅。與此同時,針對全球產品的 「對等關稅」(reciprocal tariffs)亦同步實施,進一步擴大貿易戰的規模。

自特朗普首次執政以來,關稅政策一直是其經濟戰略的核心。他堅信關稅能夠提振美國製造業、促進就業,是「讓美國再次偉大」的重要手段。然而,現實情況卻表明,這一政策正引發全球範圍內的擔憂和負面影響。經典經濟學理論早已證明,關稅的提升會透過多種途徑抑制經濟增長。首先,關稅導致進口價格提升,直接損害消費者利益,降低實際購買力,進而削弱消費能力。其次,進口成本上升亦提高本國企業的生產成本,並透過供應鏈傳到到相關產業,導致產出減少,企業面臨資金壓力,甚至可能引發連鎖反應,影響整體投資環境。儘管如此,特朗普依然堅信,通過關稅施加的壓力所帶來的經濟效益,將超越其潛在損失。然而,隨著貿易戰的持續升級,美國和全球的企業和消費者或將面臨更大的傷害。

 
關稅牆升級,蔓延全球

美國提出對等關稅,將貿易對抗從雙邊升級為多邊。面對特朗普無差別的關稅政策,各國政府和各跨國企業正在重新審視中長期的貿易格局及其投資戰略。新的「對等關稅」措施不僅會考慮其他國家對美徵收關稅的水平,還會綜合考慮該國對其產業提供的補貼,以及任何美方認為可能存在不公平的貿易行為。由此可見,所謂的對等關稅,實際是以美國利益—尤其是企業利益—為核心而重新定義的貿易規則。實施對等關稅,無疑會遭到各國反制。這不僅進一步加大了全球經濟的不確定性,同時也使得美國經濟面臨更大的挑戰。

歷史不會重演,但總是會驚人的相似。1930年的著名的斯姆特-霍利關稅法案(The Smoot-Hawley Tariff Act)也是美國貿易保護主義的一次激進嘗試。為了解決國內產能過剩,保護美國本土産業和幫助受困農民,該法案將美國近兩萬多種進口商品的關稅提升至歷史高位。法案通過後,來自各國的報復性關稅措施也使美國經濟面臨重創,導致美國在大蕭條時進出口減少近三分之二。雖然沒有證據表明報復性關稅是導致美國經濟大蕭條的直接原因,但是報復性關稅對美國市場的壓力,以及圍繞法案的一系列負面爭端,無疑是美國經濟大衰退的催化劑。

時至今日,特朗普仍然試圖以加徵關稅解決美國國內就業等一系列經濟問題,使美國變得更加富裕。然而,根據對特朗普第一次執政時關稅戰略的評估,加徵關稅所帶來的成效十分有限。相比之下,這種保護主義政策往往適得其反。貿易戰帶來的通貨膨脹、投資不確定性等負面效應,使得美國民衆和企業同樣受累。特朗普二次執政後,關稅戰愈演愈烈。如果對等關稅如期執行,新的稅收規則將不僅僅是特朗普為美國爭取利益而發出的威脅,預期各國的反制措施也會使美國經濟雪上加霜,並進一步陷入類似當年斯姆特-霍利關稅法案的困境。

 
拉攏各國合作 中國謀破局

據2024年貿易數據顯示,中國、歐盟、墨西哥、越南和台灣分列美國貿易逆差前五位,考慮到特朗普再執政後,中國已被美國徵收20%額外關稅,在此次對等關稅的框架下,中國可能不會受到更多衝擊。但對等關稅的具體實施細則,還有待4月2日美國的最新公布,值得密切關注。

此外,這輪貿易戰將會明顯有別於2018年發起的中美貿易戰,中國不再是美國關稅針對的重點,波及範圍將涉及更多國家,甚至包括美國的眾多傳統盟友,因此各國企業為控制貿易成本,投資策略料會呈現不同格局。

在中美貿易戰期間,許多企業會選擇與越南或墨西哥等國合作,以繞開美國對中國加徵的關稅。不過,面對特朗普可能實施更廣泛的關稅戰略,這投資策略的有效性將大減,以致投資環境的不確定性急劇增加,令「逃離」中國不再是規避關稅最佳選擇。企業需要重新評估其國際投資戰略以及以往對中國的投資決策,以應對全球貿易環境的最新變化。

為了應對美國保護主義政策,世界各國也會更積極地尋求新的國際合作機會,試圖繞開美國的關稅壁壘,降低貿易戰所帶來的壓力,以維護自身的經濟利益和發展空間。

在這一背景下,中國應充分利用當前國際合作的契機,積極拓展與各國互惠合作。特別是在貿易、投資和科技創新等領域,中國可深化《區域全面經濟夥伴關繫協定》(RCEP)等機制,建立更緊密的夥伴關係。

透過深化國際合作,中國不僅能夠增強自身在全球經濟中的影響力,還能為構建更加開放、多元、互惠共贏的國際經濟秩序作出重要貢獻。

 

李晶博士
港大經管學院工商管理學學士(國際商業及環球管理)課程副總監

(本文同時於二零二五年四月二日載於《信報》「龍虎山下」專欄)