CME is trading down almost $18 this morning after reporting EPS which were 7 cents short of analyst forecasts.  On a percentage basis however, the stock is only down about 3%.  The table below summarizes all EPS reports for CME since 2003.  The lines highlighted in gray represent days when the stock gapped down more than 2%.  Based on these results, the stock has generally traded higher from the open to close after gapping down on earnings.