Corn slumped 23 percent in September, the biggest monthly slide in records going back to 1959. [Bloomberg]Analysis: Corn export dominance to bend, not break - "After supplying four out of every five kernels of corn traded internationally in the mid-1990s, U.S. market share was projected to shrink to 45 percent this season, with U.S. dominance particularly hard hit in the past 10 years." [