After four days of trading this week and thousands of contracts trading hands, as of today’s close, corn is down 0.292 percent, soybeans are down 0.949 percent, and wheat has lost 1.4 percent. And it could all zero out by tomorrow’s close. With little new to factor in, markets are trading sideways with the more ambitious capturing an occasional bit of minor profit-taking. The known knowns readily outnumber the unknown knowns.

Notably mixed was today’s USDA Export Sales report. Wheat sales beat expectations but not much else did. 

There are some variables that are coming to a head. UN aid chief Martin Griffiths is “relatively optimistic” that the Black Sea grain corridor agreement will be extended...