Brazil’s decision to extend its 21.6% antidumping duty on Chinese suspension-grade PVC, or PVC-S, for another five years came in early August. The tariff itself did not change. What makes the case interesting is not the Brazilian measure, but what it reveals about a broader shift in China’s economy: when domestic demand weakens while industrial capacity continues to expand, the surplus has to find buyers abroad.
PVC is a good example. China’s property downturn has eroded an important source of demand just as additional production capacity has continued to come online. The result is an industry increasingly dependent on exports to keep its plants running.
In 2024, more than 10% of China’s PVC output was sold overseas, the highest share in more than a decade. Exports have remained strong in 2026. The logic is straightforward: the less domestic demand can absorb, the greater the incentive to compete for international customers — including through lower prices.
This is how weakness in China’s economy can turn into deflationary pressure elsewhere. Excess PVC supply squeezes prices and margins not only in countries that import directly from China. When Chinese producers win customers in India or Southeast Asia, displaced competitors have to look for other markets. The pricing pressure spreads through the global supply chain.
Brazil illustrates the mechanism well. With the antidumping duty in place, Chinese PVC-S imports accounted for less than 1% of the Brazilian market for most of the past several years. It would therefore be wrong to blame China directly for the recent deterioration in Brazil’s domestic industry.
Even so, between 2020 and 2024, the average price of PVC-S sold in Brazil fell 30.1% in real terms, while domestic producers’ net revenue dropped 29.1%. At the same time, imports from other origins increased 52.6%. The figures do not prove Chinese causality, but they are consistent with a global market facing mounting supply pressure.
Chinese deflation does not need to travel directly from the other side of the world to Brazil. It can arrive through an Asian producer that has lost market share to China, a trader using Chinese offers as a benchmark, or a competitor forced to cut prices to defend its position. In industrial commodities, the marginal price often travels more easily than the physical product itself.
India makes that dynamic even more important. The country accounts for roughly half of China’s PVC-S exports and has been tightening trade barriers. The less room Chinese producers have in their largest overseas market, the greater the risk that volumes will be redirected elsewhere.
Brazil already knows what that can look like. When it temporarily suspended the antidumping duty between 2020 and 2021, Chinese PVC-S imports surged by almost 900% and approached 10% of the Brazilian market. Once the duty was reinstated, shipments from China fell 99.7%.
For Braskem and Unipar, then, extending the antidumping measure is less a new benefit than protection against a repeat of that episode. The two companies are not being shielded from a Chinese import surge already under way, but from a scenario in which China’s excess supply once again seeks a foothold in Brazil.
China’s own government appears to recognize the limits of this model. Beijing eliminated the VAT rebate on PVC exports this year in an effort to curb destructive competition and ease the pressure created by excess capacity. Even so, as long as domestic demand remains weak and factories keep producing, the incentive to export will remain.
That is what makes Brazil’s tariff more interesting than it first appears. The 21.6% antidumping duty is not merely a barrier protecting Braskem and Unipar from Chinese PVC. It is an attempt to prevent a small part of China’s domestic imbalance from being imported into Brazil in the form of lower industrial prices. China has too much capacity and too little demand. Increasingly, it is exporting the difference.
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