The Causality Link system is permanently computing over 2,000 indexes (or indicators) for all countries in the world and 40,000 companies by analyzing large flows of news in real time.

For large countries, the number of monthly detections for each index is in the hundreds, so they tend to move slowly. For this reason, we were quite surprised to observe last week a very sharp drop in the “crops” index for China (Figure 1).

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