Corn Corn basis in South America continues to be weak. July shipments at the beginning of the week in review were buyable at +30 CU (or -10 CN with the CN/CU spread at 40 cents/bu) and September/October shipments were buyable at +40 CU. At the end of the week, all positions fell below +20 CU and were willing to see bids near those levels. Keeping in mind that Brazilian premiums are weaker (below +20 CU for September and below +20 CZ for October/November), Argentine corn is still not competitive. At a 20 cents/bu discount, demand will continue to buy out of Brazil.Sellers will start giving some reference values for new crop corn. The local market in Argentina is very firm. Trading houses started the week willing to pay $165/MT, but there...