The CBOT mostly drifted lower in lackluster trade overnight until Russia’s President Putin made comments that hinted the country has few intentions of extending the Ukrainian grain export corridor agreement. President Putin did not explicitly say that his country won’t extend its agreement with Ukraine but claimed the existing deal has not increased export to developing nations, which – according to Russia – was a primary goal of the agreement.  The doubts now surrounding the Ukrainian grain export outlook caused a sharp rally in wheat futures, which rose as much as 50 cents and pulled corn and soybeans higher as well. By the closing bell, however, corn and soybeans pulled back and posted small losses as pre-WA...