Grain and soy futures traded mostly lower overnight in average volume. Corn's technical reversal yesterday set a negative tone along with weather forecasts. This pattern was largely repeated during the day session, led by weakness in soybeans. General Comments China reported that its second quarter gross domestic product (GDP) grew at the rate of 7 percent, which exceeded analysts' expectations and left some wondering if Chinese officials padded that number. The stock market there was unimpressed as the Shanghai Index declined 3 percent. NYMEX crude oil fell about $1.50 despite a small drawdown in stocks last week. Energy markets know that the Iranian nuclear deal will mean additional oil for a market that is already oversupplied relative...