The Fed's second round of monetary stimulus, the $600 billion QE2, ended on June 30. Since then, financial markets have rallied on news of another Greek bailout, and then fallen on weakening jobs and economic news from the U.S. The Dow is basically back to where it was when QE2 ended on June 30. So the world hasn't ended, and yet there are those who think we need a third round. The minutes of the latest meeting of Federal Reserve officials, released Tuesday, show them divided on whether to implement a third round of monetary stimulus. Before we get ahead of ourselves, let's first assess QE2. For that, we turn to two of our regular contributors, Justin Wolfers, and James Altucher.