Markets Tumble Over Fears of Weakening Economy 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 businessman looks at an electric quotation board flashing the stock prices at a window of a security company in central Tokyo on August 5, 2011. Tokyo shares plunged 395.09 points or 4.09 percent. ( TOSHIFUMI KITAMURA/AFP/Getty Images / Getty ) Produced by PRI and WNYC