Markets started lower Sunday night, and that weakness accelerated into widespread selling across the wheat and soybean markets today. Some of the same bearish factors took center stage again, including the following:

Lack of progress in the trade talks with China Possibility of late week rain in parts of the northern and southern Plains plus a chance for some precipitation across the Black sea region Expectations that U.S. corn planting could have reached 40 percent completion in today’s crop progress report The pending May WASDE (supply/demand) to be released Thursday

As it is too early to do anything else, most assume that USDA will use trend-line yields (or close) on the supply side and be conservative on the demand side i...