Anti-Dumping Policy

Anti-dumping policy is the set of legal tools that governments use to counteract the practice of dumping, which occurs when a company exports a product at a price below what it charges in its home market. Under World Trade Organization rules, an importing country can impose an additional duty on those goods, but only after conducting a formal investigation that confirms dumping is happening and that it is causing material injury to the domestic industry producing the same product.

Think of it like a price floor at the border: if foreign goods arrive too cheaply, the government adds a charge to bring the price back to a level that domestic producers can compete with.

The WTO Agreement Is the Global Rulebook

The legal framework is the WTO Anti-Dumping Agreement, formally titled the Agreement on Implementation of Article VI of the General Agreement on Tariffs and Trade 1994. It came into effect on January 1, 1995. The agreement does not prohibit dumping itself. It prohibits governments from imposing anti-dumping duties arbitrarily. Every investigation must follow defined procedures, use evidence-based standards, and meet two core tests: proof that dumping is occurring, and proof that the dumped imports are causing material injury to the domestic industry.

47 WTO members reported anti-dumping actions in the first half of 2025, demonstrating how actively this policy tool is used globally.

How the Dumping Margin Is Calculated

Determining whether dumping has occurred requires calculating the "dumping margin," which is the difference between the export price and the normal value of the product in the exporting country. The normal value is typically the home market price. If home market sales are below cost of production for an extended period, they may be disregarded and the normal value is instead calculated from cost data.

In cases involving countries that do not have market economy status, the calculation becomes more complex. The European Union applies an alternative method for countries with significant state distortions, using undistorted international benchmarks instead of domestic prices. China is the primary country to which this treatment has been applied.

Who Conducts the Investigation in the United States

In the US, two agencies share responsibility. The Department of Commerce's International Trade Administration determines whether dumping is occurring and calculates the dumping margin. The US International Trade Commission independently determines whether the domestic industry is suffering material injury because of those imports. Both agencies must make affirmative determinations before duties can be imposed.

The investigation process typically runs for 280 to 420 days. Provisional duties may be applied within 120 days of initiation to provide interim relief to domestic producers while the investigation proceeds.

Recent Enforcement Actions Show Broad Application

In April 2026, the European Commission imposed anti-dumping duties on softwood plywood from Brazil and on continuous filament glass fibre from Egypt, Bahrain, and Thailand. These actions followed investigations that found both products were being sold in the EU at prices below normal value and that the resulting competition was injuring EU producers.

Critics argue that anti-dumping measures are sometimes deployed as disguised protectionism rather than genuine injury remedies. Research has found that in the EU, the vast majority of anti-dumping cases between 1980 and 1997 involved factors beyond simply offsetting dumping, and that the US practice of "zeroing" when calculating margins has been repeatedly found to violate WTO rules.

Sources:
https://www.wto.org/english/tratop_e/adp_e/adp_e.htm
https://www.trade.gov/trade-guide-anti-dumping
https://en.wikipedia.org/wiki/Dumping_(pricing_policy)
https://policy.trade.ec.europa.eu/enforcement-and-protection/trade-defence/anti-dumping-measures_en
https://ustr.gov/trade-agreements/wto-multilateral-affairs/wto-issues/trade-remedies/anti-dumping