Turnaround Tuesday’s higher prices for grain and soy futures did not last long. An array of negative macro influences and forecasts for a week of favorable weather for the Plains and Midwest sent soy and wheat prices back near where they were at Monday’s close. Commodity prices in general suffered a backlash from the spreading currency contagion among developing economies, led by the Turkish lira. Besides the lira, trade war rub-off has further weakened the Russian ruble and the Brazilian real (among others). Currency traders searching for safety are piling into the U.S. dollar, which sent the U.S. Dollar Index to its highest level in 13 months earlier today. Most major commodity values except livestock were lower today. Beside...