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 , the s&p financial index and the kbw bank 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 , 2008 at the closing price on the last trading day of 2008 , and also assumes reinvestment of common stock dividends . the s&p financial index is a publicly available measure of 81 of the standard & poor's 500 companies , representing 17 diversified financial services companies , 22 insurance companies , 19 real estate companies and 23 banking companies . the kbw bank index seeks to reflect the performance of banks and thrifts that are publicly traded in the u.s. , and is composed of 24 leading national money center and regional banks and thrifts. . <table class='wikitable'><tr><td>1</td><td>-</td><td>2008</td><td>2009</td><td>2010</td><td>2011</td><td>2012</td><td>2013</td></tr><tr><td>2</td><td>state street corporation</td><td>$ 100</td><td>$ 111</td><td>$ 118</td><td>$ 105</td><td>$ 125</td><td>$ 198</td></tr><tr><td>3</td><td>s&p 500 index</td><td>100</td><td>126</td><td>146</td><td>149</td><td>172</td><td>228</td></tr><tr><td>4</td><td>s&p financial index</td><td>100</td><td>117</td><td>132</td><td>109</td><td>141</td><td>191</td></tr><tr><td>5</td><td>kbw bank index</td><td>100</td><td>98</td><td>121</td><td>93</td><td>122</td><td>168</td></tr></table> .
Question: what was the state street corporation value in 2013?
Answer: 198.0
Question: and what was it in 2008?
Answer: 100.0
Question: what was, then, the change in value of the state street corporation over the years?
Answer: 98.0
Question: what was the state street corporation value in 2008?
Answer: 100.0
Question: how much does that change represent in relation to the 2008 value, in percentage?

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0.98
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