December corn was down 7 1/4 cents late in the overnight session and pushed to the lowest level since August 22nd. Outside market forces look weak today, with a strong US dollar and weakness in equity and energy markets. There have still been no deliveries for September corn. The USDA reports will set the tone for the session today, with traders looking for US production near 12.505 billion bushels, down near 410 million bushels from last month and compared with 12.447 billion last year. Traders see yield just under 149 bushels per acre. Old crop ending stocks are expected to be adjusted higher by about 35 million bushels from 940 million last month. New crop ending stocks are expected to fall to near 636 million bushels from 714 million last month. December corn closed 2 1/2 cents higher on the session Friday but down 23 1/2 cents for the week. Weakness in outside market forces helped to limit the buying support. A move to the highest level since mid-March for the US dollar added to the negative tone. Better than expected export news plus some talk of frost possibilities for the northern Midwest for late this week helped to support. Weekly export sales, in the report released before the open on Friday, came in at 820,600 metric tonnes for the current marketing year and 50,000 for the next marketing year for a total of 870,600, which was near expectations. Cumulative corn sales stand at 29.9% of the USDA forecast for 2011/12 (current) marketing year versus a 5 year average of 23.3%. Sales of 596,000 metric tonnes are needed each week to reach the USDA forecast. In addition, private exporters reported a sale of 127,506 tonnes of US corn to unknown destination. Traders are concerned that usage is already being rationed with recent high prices as corn values remain well above wheat. The Commitments of Traders reports as of September 6th showed non-commercial traders were net long 353,708 contracts, an increase of just 385 contracts for the week. Commodity index traders held a net long position of 365,135 contracts, up 264 for the week.