May kicked off with Saturday’s running of the 147th Kentucky Derby, arguably the most famous horse race in history, and the Medina Spirit won with a time of 2 minutes 1.02 seconds. On Sunday night, the CBOT seemed determined to match Medina Spirit’s pace and started this week’s market race with a gap-higher opening. Corn futures posted a new contract high overnight, and soybeans and wheat followed closely behind.  Most CBOT contracts ended lower for the day, despite the strong overnight markets. Today is the first day of the CBOT’s new, expanded price limits for commodities listed below. That, combined with higher margin requirements for these commodities means some funds and traders are having to reduce their...