What Russia taketh away, Russia apparently giveth back. Just three days after leaving the Ukraine export corridor deal, Russia reversed its weekend decision and re-joined the export agreement. Apparently, President Putin made the decision and agreed to cooperate with the UN, Turkey, and (to a far lesser extent) Ukraine, regarding food exports from the Black Sea following a phone call with Turkey’s President Erdogan. Turkey reportedly offered assurances that the grain export corridor would not be used for military purposes, which seemed to assuage Russian concerns.  The CBOT, expectedly, pulled back sharply after Russia’s decision was announced overnight and corn and wheat posted the largest losses. Wheat futures fell 50+ c...