時間序列資料。

code year trdmnt mretwd mretnd

2 2001 Aug .068881 .068691

2 2002 Feb .025819 .025819

2 2003 Aug .014129 .014129

2 2004 Oct -.077491 -.077491

2 2005 Jun .044165 .045161

2 2006 May -.041734 -.041734

2 2007 Jul .480126 .480126

2 2008 Mar .158042 .158042

2 2009 Jul .047843 .047843

2 2010 Oct .154762 .154762

4 2001 Oct -.124664 -.124664

4 2002 Aug -.071683 -.071683

4 2003 Aug .006574 .006574

4 2004 Jun -.257919 -.257919

4 2005 Jan .012077 .012077

4 2006 May .4613 .4613

4 2007 Nov -.105731 -.105731

4 2008 Jan .182584 .182584

4 2009 Nov .119821 .119821

4 2010 Apr -.0478 -.0478

5 2001 Jul -.142385 -.142201

5 2002 Jul -.11437 -.11437

5 2003 Jun -.093834 -.093834

5 2004 Feb .07619 .07619

5 2005 Oct -.064935 -.064935

5 2006 Mar .433414 .433414

5 2007 Jul -.158427 -.158427

5 2008 Sep 0 0

5 2009 Aug -.239175 -.239175

5 2010 Apr -.046914 -.046914