Soy down 5-6 cents, corn down 1-3, wheat down 4-5

CHICAGO: Following are US trade expectations for the opening of grain and soy complex trading at the Chicago Board of Trade at 8:30 a.m. CDT (1330 GMT) on Monday.

WHEAT - Down 4 to 5 cents per bushel

* Wheat lower, following downturns in soybeans and corn. Additional pressure noted from the ongoing US winter wheat harvest.

* Russia's IKAR agriculture consultancy lowered its 2019 wheat output forecast to 77.5 million tonnes from 78.5 million tonnes previously.

* The supplement to the US Commodity Futures Trading Commission's weekly commitments report showed large speculators expanded their net short position in CBOT wheat by about 6,000 contracts in the week to July 9, to 19,704 lots.

* For K.C. hard red winter wheat, the CFTC's supplemental report showed large speculators trimmed their net short by about 1,200 contracts, to 16,232 lots.

* CBOT September soft red winter wheat contract last traded down 4-3/4 cents at $5.18-1/4 a bushel. K.C. hard red winter wheat for September delivery was down 5-1/4 cents at $4.62 a bushel and MGEX September spring wheat was down 2-3/4 cents at $5.40 a bushel.

CORN - Down 1 to 3 cents per bushel

* Corn futures head lower, following a downturn in soybeans on ideas that showers from the remnants of Tropical Storm Barry will bring welcome moisture to crops in the Mississippi River Delta and the eastern Corn Belt. Market underpinned by forecasts for hot and mostly dry weather elsewhere in the US crop belt, and prospects for a drop in corn condition ratings.

* The supplement to the CFTC's weekly commitments report showed large speculators slightly expanded their net long position in CBOT corn by 226 contracts in the week to July 9, to 131,024 lots.

* CBOT December corn futures last traded down 3-1/2 cents at $4.50-3/4 a bushel.

SOYBEANS - Down 5 to 6 cents per bushel

* Soybeans lower, turning down after a firm open on expectations that rains from the remnants of Tropical Storm Barry will bring beneficial moisture to crops in the Mississippi River Delta and eastern Midwest.

* China's pig herd shrank 25.8% in June compared with the same month a year earlier, while the sow herd contracted 26.7%, the Ministry of Agriculture and Rural Affairs said.

* Market awaits monthly crush data due Monday from the National Oilseed Processors Association.

* The CFTC's weekly commitments report showed large speculators widened their net short position in CBOT soybeans by about 4,000 contracts in the week to July 9, to 62,103 lots.

* CBOT August soybeans last traded down 6-3/4 cents at $9.06-1/2 a bushel and new-crop November was last down 6-1/2 cents at $9.25 a bushel.