An anti-dumping duty is a protective import tariff imposed by a government on foreign goods that are being sold in the domestic market at a price below their normal value — typically defined as the price charged in the exporting country's home market or the cost of production plus a reasonable profit margin. Dumping is considered an unfair trade practice because it can undercut domestic producers, potentially driving them out of business, and is therefore regulated under World Trade Organisation (WTO) agreements. In India, the Directorate General of Trade Remedies (DGTR) under the Ministry of Commerce investigates anti-dumping complaints filed by domestic industries and recommends duties to SEBI's equivalent — the Ministry of Finance — which formally notifies the duty. Indian industries that have successfully obtained anti-dumping protection include steel, chemicals, pharmaceuticals, plastics, textiles, and paper. For equity investors in Indian manufacturing sectors, anti-dumping duty imposition or threat is a significant positive catalyst — protecting domestic companies from predatory foreign pricing and improving their competitive position, pricing power, and margin outlook. Conversely, expiry or reduction of existing anti-dumping duties is a negative trigger for affected domestic producers.