Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


table of contents the following performance graph is not 201csoliciting material , 201d is not deemed filed with the sec , and is not to be incorporated by reference into any of valero 2019s filings under the securities act of 1933 or the securities exchange act of 1934 , as amended , respectively . this performance graph and the related textual information are based on historical data and are not indicative of future performance . the following line graph compares the cumulative total return 1 on an investment in our common stock against the cumulative total return of the s&p 500 composite index and an index of peer companies ( that we selected ) for the five-year period commencing december 31 , 2007 and ending december 31 , 2012 . our peer group consists of the following ten companies : alon usa energy , inc. ; bp plc ( bp ) ; cvr energy , inc. ; hess corporation ; hollyfrontier corporation ; marathon petroleum corporation ; phillips 66 ( psx ) ; royal dutch shell plc ( rds ) ; tesoro corporation ; and western refining , inc . our peer group previously included chevron corporation ( cvx ) and exxon mobil corporation ( xom ) but they were replaced with bp , psx , and rds . in 2012 , psx became an independent downstream energy company and was added to our peer group . cvx and xom were replaced with bp and rds as they were viewed as having operations that more closely aligned with our core businesses . comparison of 5 year cumulative total return1 among valero energy corporation , the s&p 500 index , old peer group , and new peer group . <table class='wikitable'><tr><td>1</td><td>-</td><td>12/2007</td><td>12/2008</td><td>12/2009</td><td>12/2010</td><td>12/2011</td><td>12/2012</td></tr><tr><td>2</td><td>valero common stock</td><td>$ 100.00</td><td>$ 31.45</td><td>$ 25.09</td><td>$ 35.01</td><td>$ 32.26</td><td>$ 53.61</td></tr><tr><td>3</td><td>s&p 500</td><td>100.00</td><td>63.00</td><td>79.67</td><td>91.67</td><td>93.61</td><td>108.59</td></tr><tr><td>4</td><td>old peer group</td><td>100.00</td><td>80.98</td><td>76.54</td><td>88.41</td><td>104.33</td><td>111.11</td></tr><tr><td>5</td><td>new peer group</td><td>100.00</td><td>66.27</td><td>86.87</td><td>72.84</td><td>74.70</td><td>76.89</td></tr></table> ____________ 1 assumes that an investment in valero common stock and each index was $ 100 on december 31 , 2007 . 201ccumulative total return 201d is based on share price appreciation plus reinvestment of dividends from december 31 , 2007 through december 31 , 2012. .
Question: what was the performance price of the s&p 500 common stock in 2012?
Answer: 108.59
Question: and what was it in 2007?
Answer: 100.0
Question: what was, then, the change over the years?
Answer: 8.59
Question: and what is this change as a percentage of the 2007 performance price?

0.0859