Corn prices in Ukraine have reached parity with feed wheat prices, raising the potential for further increases in regional corn prices to be capped as buyers mull a switch in their feed choices, market sources said Tuesday. There is a logic if it is possible to switch to feed wheat from corn this is more advantageous than to switch with 11.5% wheat. The move comes as Black Sea prices have become compressed, with prices for feed wheat typically wheat of 10.5% protein or lower corn and higher 11.5% protein wheat all converging towards each other.