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.

Text: stock price performance the following graph shows a comparison of the cumulative total return on our common stock , the standard & poor's 500 index and the standard & poor's 500 retail index . the graph assumes that the value of an investment in our common stock and in each such index was $ 100 on december 30 , 2006 , and that any dividends have been reinvested . the comparison in the graph below is based solely on historical data and is not intended to forecast the possible future performance of our common stock . comparison of cumulative total return among advance auto parts , inc. , s&p 500 index and s&p 500 retail index company/index advance auto parts s&p 500 index s&p retail index december 30 , $ 100.00 100.00 100.00 december 29 , $ 108.00 104.24 january 3 , $ 97.26 january 2 , $ 116.01 january 1 , $ 190.41 101.84 december 31 , $ 201.18 104.81 . <table class='wikitable'><tr><td>1</td><td>company/index</td><td>december 30 2006</td><td>december 29 2007</td><td>january 3 2009</td><td>january 2 2010</td><td>january 1 2011</td><td>december 31 2011</td></tr><tr><td>2</td><td>advance auto parts</td><td>$ 100.00</td><td>$ 108.00</td><td>$ 97.26</td><td>$ 116.01</td><td>$ 190.41</td><td>$ 201.18</td></tr><tr><td>3</td><td>s&p 500 index</td><td>100.00</td><td>104.24</td><td>65.70</td><td>78.62</td><td>88.67</td><td>88.67</td></tr><tr><td>4</td><td>s&p retail index</td><td>100.00</td><td>82.15</td><td>58.29</td><td>82.36</td><td>101.84</td><td>104.81</td></tr></table> stock price performance the following graph shows a comparison of the cumulative total return on our common stock , the standard & poor's 500 index and the standard & poor's 500 retail index . the graph assumes that the value of an investment in our common stock and in each such index was $ 100 on december 30 , 2006 , and that any dividends have been reinvested . the comparison in the graph below is based solely on historical data and is not intended to forecast the possible future performance of our common stock . comparison of cumulative total return among advance auto parts , inc. , s&p 500 index and s&p 500 retail index company/index advance auto parts s&p 500 index s&p retail index december 30 , $ 100.00 100.00 100.00 december 29 , $ 108.00 104.24 january 3 , $ 97.26 january 2 , $ 116.01 january 1 , $ 190.41 101.84 december 31 , $ 201.18 104.81 .
Question: what was the price performance of the advance auto parts stock in january 2009?
Answer: 97.26
Question: and by how much did it change since 2006?
Answer: -2.74
Question: what is this change as a portion of the 2006 price performance of that stock?
Answer: -0.0274
Question: in the same period, what was that change for the s&p500 index?

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