Daniel, Segue um exemplo dos dados para tornar o problema reproduzível. Data CDI Ibovespa ALFA DINAMICO FIA ALFA FIA 01/02/97 100.244198 6956 77.5631 0.33373 01/03/97 100.32139 6998 78.05032 0.34725 01/06/97 100.398636 7160 79.3197 0.34982 01/07/97 100.475946 7297 82.01036 0.34084 01/08/97 100.553312 7427 82.28164 0.34426 01/09/97 100.630733 7454 82.79493 0.34285 01/10/97 100.70889 7478 82.04698 0.34263 01/13/97 100.78711 7412 82.32868 0.34275 01/14/97 100.865386 7621 84.52306 0.34776 01/15/97 100.943725 7668 86.36466 0.34922 01/16/97 101.022127 7656 86.74005 0.3513 01/17/97 101.100925 7816 86.74305 0.35152 01/20/97 101.179779 7835 86.84854 0.35297 01/21/97 101.258363 7905 87.77227 0.35453 01/22/97 101.337011 7818 87.63108 0.35711 01/23/97 101.416054 7891 87.96762 0.3565 01/24/97 101.495494 7760 87.7515 0.3547 01/27/97 101.574664 7759 87.71396 0.35453 01/28/97 101.655242 7850 87.6412 0.35487 01/29/97 101.734531 7737 86.20481 0.35258 01/30/97 101.816938 7789 86.37315 0.35225 01/31/97 101.910268 7965 88.24893 0.35641 02/03/97 102.003692 8096 89.45418 0.35969 02/04/97 102.097876 8102 89.39141 0.3595 02/05/97 102.191799 8171 90.26877 0.36263 02/06/97 102.286157 8148 90.26682 0.3611 02/07/97 102.380603 8317 92.41892 0.36529 02/12/97 102.475135 8671 96.43418 0.3736