China takes 95.5% of Brazil's soybean exports in YTD run

Through November, Brazil shipped $1.83 billion worth of soybeans to five countries. One of those five absorbed 95.5% of every dollar. The other four split the remainder.

The Herfindahl-Hirschman Index for this flow reached 0.913 — on a scale where 1.0 is absolute monopoly. Antitrust regulators flag markets above 0.25 as concentrated. For context, a market split evenly among three buyers would score 0.33. This flow is at 0.91. That is not a warning sign. It is deep past warning-sign territory, in the range that regulators classify as critical dependency.

Why the concentration is structural

Brazil is the world's largest soybean exporter. China is the world's largest importer, accounting for roughly 60% of global trade volumes. The bilateral fit is almost frictionless: Brazil's Cerrado harvest cycle aligns with Chinese crushing-plant intake windows, CBOT pricing gives both sides a neutral reference, and freight out of Paranaguá and Santos competes directly against US Gulf routes.

Throughout the accumulation period, a weakened Brazilian real sharpened the price advantage for Chinese buyers without any policy intervention needed. That structural complementarity makes concentration partly rational. The risk is not that the relationship is artificial — it is that it is almost entirely bilateral.

The exposed vulnerability

During the first US-China tariff war in 2018-2019, China pivoted soybean purchases sharply toward Brazil, and Brazilian exporters gained market share almost overnight. But the mechanism worked in both directions: when Washington and Beijing reached a partial truce, buying tilted back toward American origin. Brazil gained share almost by accident. It could lose it the same way. Quickly, even.

European demand for raw soybean is constrained by the EU's deforestation regulation (EUDR), which complicates origination from Cerrado areas without verified land-use certificates. Southeast Asia — Thailand, Vietnam, Indonesia — imports soy at volumes too small to absorb a meaningful Chinese shortfall. Egypt and Bangladesh are emerging but marginal. With only five active buying partners, the diversification base is thin.

What an HHI of 0.913 actually means

Concentration at this level has a pricing-power implication that the headline share figure doesn't fully capture. When one buyer controls over 90% of demand, it can signal a purchase pause — and that signal alone compresses FOB prices at origin before any actual volume reduction occurs. The major trading houses operating terminals at Santos and Paranaguá model this counterparty risk explicitly.

For Brazil's broader agribusiness complex, the concentration has a second-order effect on FX volatility. When Chinese buying pauses — for harvest timing, swine-herd disease cycles, or diplomatic friction — soybean-corridor flows thin quickly, adding noise to BACEN's PTAX readings on the Brazilian real.

The MDIC does not publish explicit maximum-concentration guidelines for export flows. But the private sector is watching. No exporter wants a single counterpart with pricing power sufficient to dictate FOB terms.