Corn futures prices tumbled about a dime on bearish technical signals and growing stocks of ethanol that will likely lead to lower production and therefore less demand for corn from ethanol producers. General Comments The overnight session opened quietly, but trading action picked up when technically-inspired selling was uncovered. Corn futures provided the bulk of the action. When March corn fell below its 50-day moving average yesterday (Tuesday), it posted a strong technical sell signal. A portion of the large speculative long position in corn futures held by noncommercials became vulnerable. Long liquidation in corn got well underway overnight and continued during at least the first half of the day session. By some counts, funds sold...