U.S. Federal Reserve Chairman Ben S. Bernanke

U.S. Federal Reserve Chairman Ben S. Bernanke

Joshua Roberts/Bloomberg

The Federal Reserve’s outlook that it will hold interest rates near zero through at least late 2014 has goaded investors to funnel cash toward riskier assets, even as Chairman Ben S. Bernanke warns Europe’s fiscal turmoil is creating “spillover effects” in the rest of the world.