The CBOT opened higher with soybean futures once again pressing towards the key $12.00 level. Weakness in soyoil pulled the market lower, however, and both markets finished in the red for the day. Soymeal was the upside leader in the soy complex while wheat sagged and weighed on corn. Funds were modest net buyers across the board but held limited interest in the grains. The lack of farmer selling in the U.S. or Brazil is helping markets continue to grind higher.  The U.S. Census Bureau released its monthly Advanced Retail Trade report today, which showed a 1.1 percent decline in U.S. retail spending in November. The decrease was the second in the past seven months and points to a potentially weaker U.S. economy. Notably, grocery store...