U.S. export sales were mostly lower during the week ending December 21st. The USDA says corn sales topped 1.2 million tons, an improvement from the previous week, but lower than average, while soybean meal sales were above the week before and larger than average. All other major commodities, including soybeans, beef, and pork were under both the prior week and the respective averages paces. Export business is driven by several factors, including seasonal supply and demand trends, along with the value of the dollar relative to other currencies.