BUENOS AIRES, Nov 13 (Reuters) - Argentina's closing soy prices and trends on Tuesday:
• Soy prices closed down for a third straight session at 1,810 pesos ($378) per tonne compared with the prior session's unofficial price of 1,850 pesos, affected by losses in U.S. soy futures that lasted much of the day.
• Soybean futures on the Chicago Board of Trade closed mixed on Tuesday, with the front two contracts rebounding to close higher on firm cash markets and slowed farmer offerings, traders said.
• In Rosario, soy for delivery in May 2013, which trades in U.S. dollars, closed at $315 per tonne.
