The European Union's Anti-Coercion Instrument (ACI), colloquially termed the 'trade bazooka', represents one of the most assertive trade policy tools in the EU's arsenal, yet it remains untested in practice. Adopted in November 2023 and entering into force on 27 December 2023, this regulation was designed to deter and counteract economic coercion by non-EU countries attempting to influence European policy choices through trade pressure. Originally conceived primarily with China in mind, the instrument has gained renewed relevance amid escalating transatlantic trade tensions, particularly following US tariff actions. The ACI empowers the European Commission to deploy a comprehensive range of countermeasures that extend well beyond traditional tariff retaliation, potentially restricting market access for goods, services, investment, and even public procurement. As the EU weighs its response to American trade policy, the question of whether and how to deploy this powerful but unprecedented instrument carries significant implications for the future of transatlantic economic relations, global trade governance, and the EU's credibility as an autonomous economic actor.

The Anti-Coercion Instrument operates through a structured process designed to balance deterrence with diplomatic flexibility. According to the formal regulation (EU 2023/2675), the Commission must first determine that a third country is engaging in 'economic coercion'—defined as measures affecting trade or investment intended to pressure the EU or member states into adopting or withdrawing specific policy positions. This determination triggers a graduated response beginning with diplomatic engagement and dialogue, before escalating to countermeasures if negotiations fail.

The scope of potential countermeasures is remarkably broad. As outlined by Norton Rose Fulbright and other legal analysts, the ACI permits the EU to impose tariffs, restrict services trade, limit access to public procurement, curtail foreign direct investment, and even target intellectual property rights. The instrument can affect not only state actors but private companies from the offending country, potentially shutting off access to the European single market—the world's largest consumer bloc with over 440 million consumers. Euronews characterises this as 'powerful on paper', though its practical effectiveness remains unproven.

The application of the ACI to US tariffs presents both opportunities and significant complications. From a purely technical standpoint, American tariff actions could potentially meet the threshold for 'economic coercion' if the EU determines they are designed to pressure European policy choices rather than merely protect domestic industries. The Guardian reports that the instrument, 'originally conceived in response to China, allows the EU to take wide-ranging punitive measures against a country' engaging in such practices. However, the legal and political calculus of deploying this tool against the United States differs substantially from its intended use against Beijing.

From an economic perspective, deploying the ACI against US companies would create significant cross-cutting effects. On one hand, restricting American firms' access to European markets could impose substantial costs on US exporters and investors, creating domestic political pressure within the United States. Fortune notes that measures could be timed strategically, with some analysts suggesting implementation 'ahead of the midterm elections where Republican candidates might face backlash from affected constituencies'. On the other hand, such restrictions would also harm European consumers and businesses dependent on American goods, services, and investment. Standard trade theory suggests that protectionist measures typically impose deadweight losses on both parties, even when one side 'wins' in relative terms.

The political economy considerations are equally complex. Crowell's analysis highlights that 'some EU heads of state might prefer to engage in bilateral relations in the hope of securing a better trade deal', reflecting the inherent tension between collective EU action and member state interests. Countries with larger trade surpluses with the United States or stronger bilateral relationships may resist aggressive deployment of the ACI, while those facing greater exposure to American tariffs may advocate for a robust response. This internal division could undermine the credibility of the instrument itself.

The ECIPE think tank, approaching from a centre-right perspective that generally favours trade liberalisation, raises concerns about the ACI's compatibility with World Trade Organization rules and its potential to escalate trade conflicts rather than resolve them. Critics argue that the instrument risks normalising unilateral trade restrictions at a time when the rules-based trading system is already under strain. Defenders counter that the ACI is precisely designed for circumstances where traditional WTO dispute resolution proves inadequate or too slow, and that credible deterrence requires the willingness to act.

Alternative approaches remain available to the EU. Rather than deploying the ACI immediately, the Commission could pursue the more conventional path of retaliatory tariffs similar to those drawn up during previous trade disputes. This approach would be more targeted and less escalatory, though potentially less effective as leverage. The EU might also pursue WTO dispute settlement procedures, though these are currently hampered by the paralysis of the Appellate Body. A third option involves seeking negotiated settlements through diplomatic channels, accepting some tariff impacts in exchange for broader trade stability.

The strategic ambiguity surrounding the ACI may itself serve a purpose. By maintaining the instrument as a credible threat without immediate deployment, the EU preserves negotiating leverage while avoiding the economic and diplomatic costs of implementation. However, this approach carries risks: if the ACI is perceived as a 'paper tiger' that the EU is unwilling to use, its deterrent value diminishes significantly.

The EU's Anti-Coercion Instrument represents a significant evolution in European trade policy, providing unprecedented tools to respond to economic pressure from third countries. Its potential application to US tariffs illustrates both the instrument's power and its limitations. While the ACI offers leverage that extends well beyond traditional tariff retaliation, its deployment against a close ally and major trading partner would carry substantial economic costs and political risks. The coming months will likely determine whether the EU treats the ACI as a genuine policy option or primarily as a negotiating chip. Regardless of the immediate outcome, the instrument's existence signals a broader shift toward a more assertive and autonomous European approach to trade policy—one that future analysts and policymakers will need to incorporate into their understanding of transatlantic economic relations.