USDA's 30 June numbers were mildly bullish for corn and soybeans, and the persistent heavy rainfall over southern and eastern portions of the Midwest has probably taken away some yield potential. However, is the situation really as bullish as this week's price action would suggest?The 30 June acreage and quarterly stocks reports from USDA set off a wild spate of buying by all kinds of managed money, which continued even during today's holiday-shortened session. The sudden inflow of managed money into grain and soy markets immediately following the reports' release this past Tuesday caused a strong price rally that surprised even veteran market watchers. Tuesday's volatile action did trigger a major change in both price momentum and the tech...