Grain markets ended uniformly lower on Friday, led by a sharp decline in January Soybean futures, which slid 14.25 cents to settle at 1,105.25. This marked the first lower weekly close for the contract in eight weeks. March Corn futures and March Chicago Wheat futures also finished in negative territory. Traders are now looking ahead to Tuesday's USDA report, with average analyst estimates pegging U.S. Corn ending stocks at 2.124 billion bushels and Brazilian Soybean production rising slightly to 175.35 million metric tons.