The ag markets – and financial markets broadly – posted a dramatic reversal on Wednesday after President Trump hinted on social media that he might create a 90-day pause in tariffs for some countries. That news sparked a huge turnaround in markets that otherwise seemed slated for weaker closes on earlier, more depressing trade news. Early trade was dominated by news of China’s announcement of 84 percent duties on U.S. good starting Thursday, an escalation that occurred after the U.S. applied 104 percent tariffs on Chinese good shortly after midnight Wednesday morning. China’s move raises the previously announced 34 percent tariffs to 84 percent in addition to other tariffs already in place. Other bearish developments...