Conventional wisdom among many traders of grain futures is that USDA's unexpectedly huge 1 March quarterly corn stocks estimate killed the long-term bull market in grains and the soy complex. After that report was released on Thursday, 28 March, the May corn contract fell the 40-cent daily limit. Friday was a holiday, but that did not matter because on Monday, 1 April, with an expanded daily limit, the May corn contract plunged an additional 53 cents for a total loss of 93 cents in two trading days. CME May wheat fell 72.75 cents during the same two trading days, and May soybeans lost 63 cents. When futures prices across the board fall so far in two trading days, it has to be a signal of something.Actually, this long-term bull market in g...