On September 30, 2009, the Mexican Government eliminated the anti-dumping duties applicable to imports of Poly (vinyl chloride) from the United States, classified under the following tariff code of Mexico's Harmonized System: 3904.10.03.
 
The anti-dumping investigation was initiated on February 6, 1990 upon request of Altaresin, S. A. de C. V., Grupo Primex, S. A. de C. V., Policyd, S. A. de C. V. and Polímeros Centro Industrial, S. A. de C.V. On June5, 1991, the Government of Mexico adopted anti-dumping duties of 0.70 to 0.196 dollars per kilogram, depending on the exporter company, against imports of poly (vinyl chloride) from the United States. On August 14, 1995 the Mexican authorities modified the anti-dumping duties: 12.5% to 34.6%, depending on the exporter.
 
On September 3, 2009 the national producer Mexichem Resinas Vinílicas, S.A. de C.V., and Policyd, S.A. de C.V requested the Mexican authorities to eliminate the anti-dumping duties. The companies argued that the circumstances that originated the initiation of the anti-dumping investigation had changed since .
 
Thus, on September 30, 2009, the Mexican Government, after reviewing the new circumstances in the poly (vinyl chloride) market, decided to eliminate the anti-dumping duties.
This decision by the Mexican government essentially removed a trade barrier before its natural expiry date; the decision therefore benefits a foreign commercial interest.