Spreadsheet: 107068d1304247306-need-help-with-correlation-matrix-nab
Sheet: Sheet 1 - Table 1

 | Price History
 | National Australia Bank Limited (NAB)
 | Date | Open | High | Low | Close | Monthly Return | Average | [NAME]
 | 2003-01-31 00:00:00 |  |  |  | 31.7 | -0.09247508576484846 | -0.003229581473612536 | 0.003724153399818848
 | 2003-02-28 00:00:00 |  |  |  | 28.9 | 0.1018943076813402
 | 2003-03-31 00:00:00 |  |  |  | 32 | 0.01550418653596525
 | 2003-04-30 00:00:00 |  |  |  | 32.5 | 0.01829319304732548
 | 2003-05-30 00:00:00 |  |  |  | 33.1 | 0.01201215644800343
 | 2003-06-30 00:00:00 |  |  |  | 33.5 | -0.02723315045835873
 | 2003-07-31 00:00:00 |  |  |  | 32.6 | -0.04710446918747346
 | 2003-08-29 00:00:00 |  |  |  | 31.1 | -0.00969312920565968
 | 2003-09-30 00:00:00 |  |  |  | 30.8 | -0.006514681021193642
 | 2003-10-31 00:00:00 |  |  |  | 30.6 | -0.05715841383994875
 | 2003-11-28 00:00:00 |  |  |  | 28.9 | 0.03735578654376903
 | 2003-12-31 00:00:00 |  |  |  | 30 | 0.01980262729617973
 | 2004-01-30 00:00:00 |  |  |  | 30.6 | 0.009756174945364656
 | 2004-02-27 00:00:00 |  |  |  | 30.9 | 0.00323102058144654
 | 2004-03-31 00:00:00 |  |  |  | 31 | -0.04959694113937206
 | 2004-04-30 00:00:00 |  |  |  | 29.5 | 0.02345166103504988
 | 2004-05-31 00:00:00 |  |  |  | 30.2 | -0.01333353086946514
 | 2004-06-30 00:00:00 |  |  |  | 29.8 | -0.1098448281051549
 | 2004-07-30 00:00:00 |  |  |  | 26.7 | -0.003752349618550353
 | 2004-08-31 00:00:00 |  |  |  | 26.6 | 0.01492565021667557
 | 2004-09-30 00:00:00 |  |  |  | 27 | 0.04702493864486298
 | 2004-10-29 00:00:00 |  |  |  | 28.3 | -0.007092228309491798
 | 2004-11-30 00:00:00 |  |  |  | 28.1 | 0.02460581080220019
 | 2004-12-31 00:00:00 |  |  |  | 28.8 | 0.02739897418811456
 | 2005-01-31 00:00:00 |  |  |  | 29.6 | -0.0273989741881145
 | 2005-02-28 00:00:00 |  |  |  | 28.8 | -0.01398624197473995
 | 2005-03-31 00:00:00 |  |  |  | 28.4 | 0.02777956410707567
 | 2005-04-29 00:00:00 |  |  |  | 29.2 | 0.0726391836399717
 | 2005-05-31 00:00:00 |  |  |  | 31.4 | -0.01929320293467878
 | 2005-06-30 00:00:00 |  |  |  | 30.8 | 0.01290340483590778
 | 2005-07-29 00:00:00 |  |  |  | 31.2 | 0.00320000273067085
 | 2005-08-31 00:00:00 |  |  |  | 31.3 | 0.05288946392037264
 | 2005-09-30 00:00:00 |  |  |  | 33 | 0
 | 2005-10-31 00:00:00 |  |  |  | 33 | -0.01526747213078842
 | 2005-11-30 00:00:00 |  |  |  | 32.5 | -0.003081666537408112
 | 2005-12-30 00:00:00 |  |  |  | 32.4 | 0.04525659158812086
 | 2006-01-31 00:00:00 |  |  |  | 33.9 | 0.07936174067412007
 | 2006-02-28 00:00:00 |  |  |  | 36.7 | 0.02688333939344045
 | 2006-03-31 00:00:00 |  |  |  | 37.7 | -0.002656044058116296
 | 2006-04-28 00:00:00 |  |  |  | 37.6 | -0.06880291992402865
 | 2006-05-31 00:00:00 |  |  |  | 35.1 | 0.002844952132231345
 | 2006-06-30 00:00:00 |  |  |  | 35.2 | 0.01969121289018168
 | 2006-07-31 00:00:00 |  |  |  | 35.9 | 0.01108044577657196
 | 2006-08-31 00:00:00 |  |  |  | 36.3 | 0.0109590137897196
 | 2006-09-29 00:00:00 |  |  |  | 36.7 | 0.04005876055200495
 | 2006-10-31 00:00:00 |  |  |  | 38.2 | 0.02584123118388733
 | 2006-11-30 00:00:00 |  |  |  | 39.2 | 0.03509131981126998
 | 2006-12-29 00:00:00 |  |  |  | 40.6 | -0.004938281640582677
 | 2007-01-31 00:00:00 |  |  |  | 40.4 | 0
 | 2007-02-28 00:00:00 |  |  |  | 40.4 | 0
 | 2007-03-30 00:00:00 |  |  |  | 40.4 | 0.06237033072645809
 | 2007-04-30 00:00:00 |  |  |  | 43 | -0.0116960397631913
 | 2007-05-31 00:00:00 |  |  |  | 42.5 | -0.03593200922606333
 | 2007-06-29 00:00:00 |  |  |  | 41 | -0.06551460711062669
 | 2007-07-31 00:00:00 |  |  |  | 38.4 | 0.0383188643021366
 | 2007-08-31 00:00:00 |  |  |  | 39.9 | -0.005025136202672932
 | 2007-09-28 00:00:00 |  |  |  | 39.7 | 0.08217180941655738
 | 2007-10-31 00:00:00 |  |  |  | 43.1 | -0.1180731009231019
 | 2007-11-30 00:00:00 |  |  |  | 38.3 | -0.01314079356105825
 | 2007-12-31 00:00:00 |  |  |  | 37.8 | -0.08845542056186331
 | 2008-01-31 00:00:00 |  |  |  | 34.6 | -0.1834782949217783
 | 2008-02-29 00:00:00 |  |  |  | 28.8 | 0.04746653723892375
 | 2008-03-31 00:00:00 |  |  |  | 30.2 | 0
 | 2008-04-30 00:00:00 |  |  |  | 30.2 | 0.03577617316528365
 | 2008-05-30 00:00:00 |  |  |  | 31.3 | -0.166473364553931
 | 2008-06-30 00:00:00 |  |  |  | 26.5 | -0.070341489358245
 | 2008-07-31 00:00:00 |  |  |  | 24.7 | -0.008130126083250176
 | 2008-08-29 00:00:00 |  |  |  | 24.5 | -0.008196767204178515
 | 2008-09-30 00:00:00 |  |  |  | 24.3 | -0.01242251999855721
 | 2008-10-31 00:00:00 |  |  |  | 24 | -0.1823215567939546
 | 2008-11-28 00:00:00 |  |  |  | 20 | 0.04401688541677426
 | 2008-12-31 00:00:00 |  |  |  | 20.9 | -0.1005872369051687
 | 2009-01-30 00:00:00 |  |  |  | 18.9 | -0.05436120921888738
 | 2009-02-27 00:00:00 |  |  |  | 17.9 | 0.1159191022183209
 | 2009-03-31 00:00:00 |  |  |  | 20.1 | 0.02457126073050533
 | 2009-04-30 00:00:00 |  |  |  | 20.6 | 0.06575137756278043
 | 2009-05-29 00:00:00 |  |  |  | 22 | 0.01801850550267821
 | 2009-06-30 00:00:00 |  |  |  | 22.4 | 0.08141539148550864
 | 2009-07-31 00:00:00 |  |  |  | 24.3 | 0.159427736928102
 | 2009-08-31 00:00:00 |  |  |  | 28.5 | 0.07761060270492397
 | 2009-09-30 00:00:00 |  |  |  | 30.8 | -0.03300629646816997
 | 2009-10-30 00:00:00 |  |  |  | 29.8 | -0.0411016756855518
 | 2009-11-30 00:00:00 |  |  |  | 28.6 | -0.0428637044317825
 | 2009-12-31 00:00:00 |  |  |  | 27.4 | -0.03717900324175401
 | 2010-01-29 00:00:00 |  |  |  | 26.4 | -0.03861483612777954
 | 2010-02-26 00:00:00 |  |  |  | 25.4 | 0.07943683064803478
 | 2010-03-31 00:00:00 |  |  |  | 27.5 | 0.01801850550267821
 | 2010-04-30 00:00:00 |  |  |  | 28 | -0.1294580672368867
 | 2010-05-31 00:00:00 |  |  |  | 24.6 | -0.05429308236666225
 | 2010-06-30 00:00:00 |  |  |  | 23.3 | 0.07441448556608332
 | 2010-07-30 00:00:00 |  |  |  | 25.1 | -0.07871556746547398
 | 2010-08-31 00:00:00 |  |  |  | 23.2 | 0.08665211706121043
 | 2010-09-30 00:00:00 |  |  |  | 25.3 | 0.007874056430905866
 | 2010-10-29 00:00:00 |  |  |  | 25.5 | -0.08594242980072477
 | 2010-11-30 00:00:00 |  |  |  | 23.4