The Global Centre for Risk and Innovation (GCRI)
Trade moves food from surplus to deficit regions and lets countries eat beyond what they grow. It also concentrates dependence: a few exporters supply most traded grain and vegetable oil, and much of it passes through a few straits, canals and ports. Prices carry shocks from world markets into local ones, unevenly. This page sets out how import dependence, market concentration, chokepoints and price transmission are measured, and who decides on the evidence.
GCRI · Established · service level R0
Food trade risk is the exposure of countries and households to disruptions in traded food: concentrated exporters, maritime chokepoints, export restrictions and price spikes that pass from world to local markets. Trade lets countries eat beyond what they grow, and it concentrates dependence. Market monitors such as AMIS and FAO GIEWS track stocks, prices and policy measures.
Plains, deltas and basins, the corridors that carry food to ports, and how far each division sits from one, shown for the Mississippi Basin as an example geography for this subject.
Import concentration, prices and trade routes. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.
Countries that import much of a staple from few suppliers are exposed to those suppliers' harvests, policies and logistics. Concentration of both suppliers and routes compounds the exposure.
Grain, oilseeds and fertiliser move through a limited set of straits, canals, rail corridors and ports. Closure, congestion or low water reroutes cargo, lengthens voyages and raises freight and insurance costs.
When prices spike, exporters may restrict sales to protect domestic consumers. Each restriction raises world prices further and encourages others to follow, so a supply shock becomes a policy shock.
World price changes reach local markets through exchange rates, transport costs, tariffs, subsidies and market structure. Currency depreciation can raise import costs even while world prices fall.
Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.
| Term | Definition |
|---|---|
| Cereal import dependency ratio | Cereal imports as a share of domestic cereal supply, measuring how far a country relies on trade for staples. |
| Stocks-to-use ratio | End-of-season stocks of a commodity divided by its use over the season, a measure of the buffer against shocks. |
| Price transmission | The degree and speed with which changes in world prices pass into domestic and local market prices. |
| Export restriction | A measure such as a ban, quota or tax that limits a country's food exports, often adopted when prices spike. |
Each indicator carries its unit, its cadence, the kind of source behind it and the evidence label a value would carry. No values are shown: a programme supplies them under its own authority.
| Indicator | Unit | Cadence | Source type | Label |
|---|---|---|---|---|
| Cereal import dependency ratio | percent of domestic supply | annual | Food balance sheets | OFFICIAL |
| Supplier concentration of staple imports | Herfindahl-Hirschman index | annual | Bilateral trade statistics | ESTIMATED |
| FAO Food Price Index | index points against a base period | monthly | International export quotations | OFFICIAL |
| Indicator of food price anomalies (SDG 2.c.1) | standardised anomaly class | monthly | Domestic market price monitoring | OFFICIAL |
| Stocks-to-use ratio | percent of annual use | monthly | Supply and demand balances | ESTIMATED |
| Export restrictions in force | share of world calorie trade affected | weekly | Policy trackers | REPORTED |
| Dry bulk freight rate | index points | daily | Shipping market indices | OBSERVED |
| Food import bill against export earnings | ratio | annual | Trade and balance of payments statistics | OFFICIAL |
The topic as a computational graph: named sources feed the methods, an evidence review gates the outputs, and the decisions stay with the authorities that hold them.
Fig. 02Nodes carry their type, two metric rows and a state; connectors show what feeds what; dashed frames name the owners; the timeline is the cadence. Design of the pipeline, not a record of a run.
Named public datasets and institutional records, each with its licence class. Sources by agreement are used only under their terms and never republished.
| Source | What it gives | Licence class |
|---|---|---|
| UN Comtrade | Bilateral trade flows by commodity and partner | Free with registration, terms per UN |
| CEPII BACI | Reconciled bilateral trade flows at product level | Open licence, attribution |
| AMIS Market Monitor (G20 Agricultural Market Information System) | Supply, demand, stocks and policy for wheat, maize, rice and soybeans | Free, attribution |
| FAO GIEWS Food Price Monitoring and Analysis tool | Domestic retail and wholesale staple prices by market | Free and open, attribution |
| IFPRI Food and Fertilizer Export Restrictions Tracker | Export bans and licensing requirements by country and product | Free and open, attribution |
| FAOSTAT food balances and trade | Supply utilisation accounts and trade by commodity | Free and open, attribution |
| IMF PortWatch | Port calls and chokepoint transits from satellite vessel tracking | Free, terms per IMF |
Food Nexus prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.
| Who decides | The question | Evidence this page serves |
|---|---|---|
| Trade and agriculture ministries | Whether to diversify suppliers, adjust tariffs or negotiate long-term supply arrangements | Supplier concentration, route exposure and price transmission for each staple |
| Food reserve agencies and state importers | When to buy forward and how large a buffer to hold against a route or exporter shock | Stocks-to-use, freight and lead-time scenarios including chokepoint closures |
| Central banks and finance ministries | How a food price shock will pass into inflation and the balance of payments | Import bill scenarios and pass-through estimates by commodity |
| WTO members and regional trade bodies | How to discipline export restrictions and keep humanitarian food purchases exempt | Restriction trackers and their estimated effect on world prices |
Most countries rely on trade for at least part of their food, feed or fertilizer. For import-dependent countries, the resilience of their food system is decided partly abroad: in the harvests of exporting regions, the policies of their governments and the security of shipping routes. Understanding that exposure is a precondition for sensible reserve, sourcing and trade policy.
Markets transmit shocks across borders, and policy responses can amplify them.
Dependence on one exporter or one corridor raises exposure to weather, conflict or policy in that place.
When several exporters restrict sales at once, world prices can rise sharply even if global supply is adequate.
Depreciation raises import costs; limited foreign exchange can delay purchases and payment.
Customs and trade databases show flows and partners. They can be delayed, revised or inconsistent between reporters.
World and national price series show transmission; local market coverage is uneven.
Trade network models reveal concentration and potential cascades, but depend on assumptions about substitution.
Built with econometrics, they estimate price transmission and the effects of policy, with results that vary by period and market.
The current service level is R0: information and enquiries. An enquiry receives a reference and names the next step; applications, payments, compute allocations and registrations open only when their team, terms and review capacity exist.