Grain and soy markets turned slightly weaker as trading resumed last night. That continued into the day session this morning, and it soon accelerated under selling from both commercials and funds. General Comments Grain and soy markets turned slightly weaker as trading resumed last night, responding to weather forecasts that were somewhat drier with more seasonal temperatures. Some showers will return to the southern and eastern Corn Belt late this week, but there will be a few days of respite and planting opportunity in the meantime. China has been on its Dragon Boat Festival holiday and will return to work overnight. The overnight weakness continued into the day session this morning, and it soon accelerated under selling from both comme...