The investment seeks to replicate, net of expenses, the daily changes in percentage terms of a weighted average of the closing settlement prices for three futures contracts for corn that are traded on the CBOT, specifically (1) the second-to-expire CBOT corn futures contract, weighted 35%, (2) the third-to-expire CBOT corn futures contract, weighted 30%, and (3) the CBOT corn futures contract expiring in the December following the expiration month of the third-to-expire contract, weighted 35%. The fund will invest in corn futures contracts. It may also invest in corn-based swap agreements, short-term obligations of the US government and/or cash equivalents.