Energy prices are falling as the likelihood of a U.S.-led strike on Syria seems to diminish.
Crop prices fell. Prices for metals were mixed.
Crude oil for October delivery fell $1.01 to close at $109.52 a barrel on Monday in New York.
Oil had been rising over the past two weeks as tensions mounted over Syria and President Barack Obama pressed the case for a military strike in response to Syria's alleged use of chemical weapons on civilians.
On Monday there was reason to hope for a possible diplomatic solution when Syria's foreign minister welcomed a suggestion floated by U.S. Secretary of State John Kerry to move all the country's chemical weapons under international control.
Gold edged up 20 cents to $1,386.70 an ounce.
Wheat, soybeans and corn all fell.