Argentine soy prices stay flat, trade nearly nil
* Soy prices in Rosario closed unchanged at 1,350 pesos per tonne ($305), with brokers representing farmers leaving the trading floor to keep local prices from following Chicago's soy futures lower.
* Trade volume was practically nil, as it has been for the last few days, with farmers waiting for higher prices to sell their beans.
* Soybean futures on the Chicago Board of Trade fell for a third straight session as the dollar rallied and traders positioned ahead of a jobs speech by US President Barack Obama later on Thursday and ahead of the US Department of Agriculture's September crop report next week.
* In Rosario, soybeans for May 2012 delivery, priced in US dollars, ended stable at $325 per tonne.
* In the port of Quequen the oilseed traded 4 pesos lower at 1,350 pesos per tonne, while in the port of Bahia Blanca soybeans rose 7 pesos to end at 1,365 pesos per tonne.
Following is a list of grains and oilseed prices in Argentina's main ports. Values from the previous session are in parentheses. All figures listed are in pesos per tonne.
Copyright Reuters, 2011