Argentine soybean farmers are accelerating sales as a sharp price rally creates an opportunity to lock in stronger values, according to the Rosario grains exchange. Farmers traded 1.03 million metric tons of 2025/26 soybeans during the week ending September 2, the largest weekly volume since late July. The rally has been supported by firmer oil prices tied to U.S.-Iran tensions, deteriorating U.S. crop conditions and, most importantly, robust Chinese demand for U.S. soybeans – factors that are connecting South American farmer selling directly with developments in the U.S. commodity market.
The strength of Chinese buying is particularly important ahead of the expected meeting between President Donald Trump and Chinese President Xi Jinping. Any tariff relief could help sustain Chinese purchases of U.S. soybeans until fresh Southern Hemisphere supplies begin returning to the market in January. That possibility makes China’s purchasing strategy a critical variable for U.S. soybean producers, especially if concerns over domestic crop conditions continue supporting prices.
Brazil’s Export Limits Could Keep U.S. Soybeans in China’s Buying Plans
Brazil, the world’s dominant soybean exporter, has limited room to sharply increase shipments to China during the fourth quarter because of demand from other international buyers and strong domestic crushing. That could provide additional support for U.S. soybean exports during a key marketing period.
Brazil shipped 64.7 million metric tons of soybeans between January and August 2026, according to Rosario, with China accounting for 70% of those volumes. That share was down from 76% in 2025 and was the lowest since 2022, indicating that Chinese soybean purchases have become less concentrated on Brazilian supplies.
For U.S. farmers, the combination of Chinese demand, uncertainty over the U.S. crop and constrained Brazilian availability could keep soybean markets sensitive to trade developments in the coming months. Argentina’s faster farmer selling is another signal that producers are responding to the rally – and that competition among the world’s three major soybean suppliers is entering a crucial period.
