Contemporaneous and Granger causality among US corn cash and futures prices

This paper examines contemporaneous and Granger causality among US corn futures and seven cash prices from major producing states for January 2006-March 2011. Causal flows from futures to cash prices are identified with contemporaneous and in-sample Granger causality tests but not with the out-of-sample Granger causality test. While no interstate in-sample or out-of-sample Granger causality is found, contemporaneous causal linkages are revealed. No causality from cash to futures prices is determined.