Consider the following returns. The Correlation between Stock X's and Stock Z's returns is closest to: Year End Stock X Realized Return Stock Y Realized Return Stock Z Realized Return 2004 20.1% -14.6% 0.2% 2005 72.7% 4.3% -3.2% 2006 -25.7% -58.1% -27.0% 2007 56.9% 71.1% 27.9% 2008 6.7% 17.3% -5.1% 2009 17.9% 0.9% -11.3% 0.71 0.60 0.62 0.05