title: Reshaping dataframe
body: <p>I have the following dataframe shape:</p>
  
  <pre><code>                      date,        close
  exchange, symbol      
  CME       ES          2015-02-25   123
            YM          2015-02-25   345
            NQ          2015-02-25   456
            ES          2015-02-26   875
            YM          2015-02-26   742
            NQ          2015-02-26   235
  </code></pre>
  
  <p>Currently it uses a multi-index (ie: exchange + symbol). I need to change the shape of this dataframe so that the index is the date and the column is 'close' which is listed underneath exchange + symbol. The result should basically be something like this:</p>
  
  <pre><code>                              close
  (exchange, symbol)            (CME, ES)    (CME, YM)    (CME NQ)
  date
  2015-02-25                    123          345           456
  2015-02-26                    875          742           235
  </code></pre>
  
  <p>I have tried pivot/unstack/stack which im sure is the correct way to accomplish this, however I have been unable to get the desired shape.</p>