Current Chicago Mercantile Exchange (CME) futures prices suggest that market year average (MYA) corn prices for 2013 will be near $6/bu. Obviously, prices could vary from $6. In this post, historical price changes are used to evaluate possible 2013 MYA prices. Historical price changes suggest there is an 8% chance of the MYA price being below $4.50 and a 19% chance of MYA price being below $5/bu.

Historical Price Changes

MYA prices are national, cash prices farmers receive for corn from the months of September to the following August. These MYA prices are compared to average settlement prices for the December Chicago Mercantile Exchange futures contracts in the December prior to expiration. These futures prices serve as a way of predicting the MYA prices.

Percent changes are calculated for the MYA corn prices and the futures prices. To illustrate take the 2011 MYA price is $6.22/bu., which represents the price from September 2011 to August 2012. The average settlement prices of the December 2011 CME contract in December 2010 is $5.48. The $6.22 MYA price for 2011 is 14% higher than the $5.48 futures prices (14% = $6.22 MYA price / $5.48 futures price - 1).

Percent changes between 1975 through 2011 averaged -7% (see Figure 1), meaning that the MYA prices average lower than the December futures prices. Lower MYA prices than futures price reflect the fact that there typically is a basis between cash and futures prices.

Larger percent differences exist between these futures prices and MYA prices (see Figure 1). MYA prices were the furthest below futures prices in 1986 (-34%), 1981 (-32%), 1998 (-32%), 1999 (-25%) and 2001 (-23%). MYA prices were the furthest above futures prices in 1995 (30%), 1988 (28%), 2006 (23%) and 2012 (21%).