Commodity Prices Tank Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email A trader signals an offer in the corn options pit at the CME Group March 15, 2011 in Chicago, Illinois. U.S. stock and commodity prices tumbled following a sharp drop in Japan's stock market. ( Scott Olson/Getty Images / Getty ) Produced by Arwa Gunja Produced by New York Times, PRI and WNYC