The corn market tried to follow wheat's early strength but could not generate enough serious buying interest to make a go of it. Soybeans were weak all day on mostly commercial considerations. General Comments With currencies tumbling and rumors swirling, markets had plenty to chew on today. The plunging Russian ruble had wheat markets on edge with rumors that Russia's government might be forced to take action to slow or stop wheat exports in order to conserve supplies for domestic use as well as force down domestic ruble prices for wheat and flour. As well, there was chatter that China would soon approve the MIR162 GMO trait in corn and DDGS. Its ban against imports carrying that trait brought shipments of U.S. corn and DDGS to a halt in...