Wheat futures are rising sharply for the second day in a row as cold temperatures hit the U.S. and as concerns build that Ukraine's grain exports could be disrupted.
Wheat rose 23 cents, or 3 percent, to settle at $7.02 a bushel Tuesday. The price has risen nearly 7 percent over the last two days.
In Ukraine, government forces took their first military action to suppress a pro-Russian uprising in the Eastern part of the country, repelling an attack by about 30 armed men at an airport.
The price of gold had its biggest one-day increase since December.
The June contract fell $27.20, or 2 percent, to $1,300.30 an ounce. Other metals also fell broadly. Palladium fell for the first time in six days.
Corn was little changed. Soybeans rose.