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: shareholder return performance presentation the graph presented below compares the cumulative total shareholder return on state street's common stock to the cumulative total return of the s&p 500 index and the s&p financial index over a five-year period . the cumulative total shareholder return assumes the investment of $ 100 in state street common stock and in each index on december 31 , 2007 at the closing price on the last trading day of 2007 , and also assumes reinvestment of common stock dividends . the s&p financial index is a publicly available measure of 80 of the standard & poor's 500 companies , representing 26 diversified financial services companies , 22 insurance companies , 17 real estate companies and 15 banking companies . comparison of five-year cumulative total shareholder return . <table class='wikitable'><tr><td>1</td><td>-</td><td>2007</td><td>2008</td><td>2009</td><td>2010</td><td>2011</td><td>2012</td></tr><tr><td>2</td><td>state street corporation</td><td>$ 100</td><td>$ 49</td><td>$ 55</td><td>$ 58</td><td>$ 52</td><td>$ 61</td></tr><tr><td>3</td><td>s&p 500 index</td><td>100</td><td>63</td><td>80</td><td>92</td><td>94</td><td>109</td></tr><tr><td>4</td><td>s&p financial index</td><td>100</td><td>45</td><td>52</td><td>59</td><td>49</td><td>63</td></tr></table> .
Question: what is the change in the value of an investment in state street corporation from 2007 to 2009?
Answer: -45.0
Question: what is the initial investment?
Answer: 100.0
Question: what roi does this represent?
Answer: -0.45
Question: what about the change in value in s&p 500 index for the same period?

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-20.0
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