Deconstructing Wheat Price Spikes: A Model of Supply and Demand, Financial Speculation, and Commodity Price Comovement

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By Joseph Janzen (au); Colin A. Carter (u); Aaron Smith (au); Michael K. Adjemian (au)
Year: 2014
Pages: 51
Binding Paperback
ISBN 978-1-4578-5500-9

Product Code: 1457855003

Description

In 2008, wheat futures prices spiked and then crashed along with prices for other agricultural and nonagricultural commodities. Market observers offered several theories to explain this common movement, or comovement, in prices, and have proposed policies to address the perceived problem of excessive price volatility. The design of an appropriate policy response would benefit from a better understanding of the cause of the observed price movements. This study uses an econometric model to decompose observed wheat prices into a set of economic factors and measure the relative contribution of each factorto observed price changes. Findings show that market-specific shocks related to supply and demand for wheat were the dominant cause of price spikes in the three U.S. wheat futures markets. Fluctuations in the global macroeconomy associated with broadbased demand shocks were relatively less significant for wheat than for other commodities likecrude oil and corn. Little evidence suggests commodity index trading contributed to recent price spikes. Tables and figures. This is a print on demand report.

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