pre_text: performance graph the following graph and table compares the cumulative five-year total return provided to shareholders on our class a common stock relative to the cumulative total returns of the s&p 500 index and our customized peer group . the peer group includes cboe holdings , inc. , intercontinentalexchange group , inc . and nasdaq , inc . an investment of $ 100 ( with reinvestment of all dividends ) is assumed to have been made in our class a common stock , in the peer group and the s&p 500 index on december 31 , 2012 , and its relative performance is tracked through december 31 , 2017 . comparison of 5 year cumulative total return* among cme group inc. , the s&p 500 index , and a peer group 12/12 12/13 12/14 12/15 12/16 cme group inc . s&p 500 peer group * $ 100 invested on 12/31/12 in stock or index , including reinvestment of dividends . fiscal year ending december 31 . copyright a9 2018 standard & poor 2019s , a division of s&p global . all rights reserved . the stock price performance included in this graph is not necessarily indicative of future stock price performance. .
post_text: unregistered sales of equity securities during the past three years there have not been any unregistered sales by the company of equity securities. .
table: 2013 2014 2015 2016 2017
table: CME Group Inc. $164.01 $194.06 $208.95 $279.85 $370.32
table: S&P 500 132.39 150.51 152.59 170.84 208.14
table: Peer Group 176.61 187.48 219.99 249.31 323.23
question: Analyse this data from a financial earnings document. in 2017 what was the ratio of the the cme group inc . stock perfomamce to the s&p