If the presence of MIR 162 corn in Chinese soybean cargoes becomes a big problem, it could weaken exporters' abilities to fend off sales cancellations with unfavorable terms and prices. General Comments The first round of congressional testimony yesterday with Janet Yellen, the new Federal Reserve chairperson, seemed to confirm that the Fed intends to stick with its plan to reduce its buying of bonds and mortgage securities steadily month-by-month as well as keep interest rates low for many months to come. Financial markets liked her promise of consistency. U.S. stock markets rallied sharply higher yesterday, a move that was followed by Asian markets overnight. Some of the euphoria wore off today. U.S. stock indices were higher early, but...