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When prices spike: Identifying excessive volatility in fertilizer markets

Dec 9th, 2025
Sharp and volatile fertilizer price movements can hinder adoption and reduce agricultural productivity, especially among vulnerable smallholders. Using a nonparametric location-scale approach to model price returns, we quantify the conditional value-at-risk (CVaR) — the high return threshold exceeded with low probability — to identify excessive price spikes in potash, urea, and di-ammonium phosphate (DAP) markets. We use the bias-corrected estimator from Martins-Filho et al. (2018) and propose a simpler estimator based on Hill (1975). Backtesting results indicate superior performance of the Hill-based estimator, supporting its value as a convenient method for detecting unusual fertilizer price surges amid recurring global volatility.

Food Prices are Likely to Remain High and Volatile

How do wars, tariff disputes and currency fluctuations affect the international trade in agricultural products? Poor countries suffer disproportionately from inflation risks and food insecurity.

 

Consumers around the world have seen food prices going up ever since the outbreak of the COVID-19 pandemic. While food price inflation has slowed more recently, concerns over the rising cost of living have not gone away. Why is this and should we expect the cost of our daily meals to go up even more in the foreseeable future?

Global food price shocks

Cereal, Vegetable Oil, and Fertilizer Prices Continue Decline in September: FAO Food Price Index and AMIS Market Monitor Released

Reductions in cereal and vegetable oil prices contributed to a slight decline in the FAO Food Price Index in September. The Index remains nearly 20 percent below its March 2022 peak but rose 3.4 percent from September 2024.

Hunger declines globally in 2025 but remains above pre-pandemic levels: New State of Food Security and Nutrition in the World Report released

With the Sustainable Development Goal (SDG) deadline of 2030 fast approaching, the clock is ticking for the world to meet its goal of eradicating hunger and food insecurity. Some progress was made toward this milestone in 2024; however, hunger levels remain above their pre-pandemic levels, according to the 2025 State of Food Security and Nutrition in the World report.

FAO Food Price Index Rises Marginally in June

The FAO Food Price Index rose marginally in June to reach nearly 6 percent above its June 2024 level. Declining cereal and sugar prices were balanced by increases in meat, dairy, and vegetable oil prices. The Index remained more than 20 percent below the high seen in March 2022.

The future of climate change and food system research: 2025 Global Food Policy Report

The realities of a changing climate are becoming increasingly clear, with temperatures rising around the world and extreme weather events, like flooding and droughts, becoming more and more frequent. April 2025 was the second hottest April globally on record, and evidence suggests such anomalous high temperatures could become the norm rather than the exception.

New Cost of Healthy Diets Tool provides powerful look at nutrition gaps—and how to solve them

In recent years, it has become increasingly recognized that true food and nutrition security depend not just on consumption of an adequate caloric quantity of food but also on consumption of the right types of food. A healthy diet—which the WHO and FAO define as one characterized by adequate, balanced, moderate, and diverse consumption of safe foods and beverages—is essential in supporting long-term physical and cognitive health, development, and well-being and in preventing diseases and damaging nutrient imbalances.

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