Financial report context:
stock performance graph the following graph compares the most recent five-year performance of the company 2019s common stock with ( 1 ) the standard & poor 2019s ( s&p ) 500 ae index , ( 2 ) the s&p 500 ae materials index , a group of 25 companies categorized by standard & poor 2019s as active in the 201cmaterials 201d market sector , ( 3 ) the s&p aerospace & defense select industry index , a group of 33 companies categorized by standard & poor 2019s as active in the 201caerospace & defense 201d industry and ( 4 ) the s&p 500 ae industrials index , a group of 69 companies categorized by standard & poor 2019s as active in the 201cindustrials 201d market sector . the graph assumes , in each case , an initial investment of $ 100 on december 31 , 2013 , and the reinvestment of dividends . historical prices prior to the separation of alcoa corporation from the company on november 1 , 2016 , have been adjusted to reflect the value of the separation transaction . the graph , table and related information shall not be deemed to be 201cfiled 201d with the sec , nor shall such information be incorporated by reference into future filings under the securities act of 1933 or securities exchange act of 1934 , each as amended , except to the extent that the company specifically incorporates it by reference into such filing . please note that the company intends to replace the s&p 500 ae materials index with the s&p aerospace & defense select industry index and the s&p 500 ae industrials index in subsequent stock performance graphs . we believe that the companies and industries represented in the s&p aerospace & defense select industry index and the s&p 500 ae industrials index better reflect the markets in which the company currently participates . all three indices are represented in the graph below . arconic inc . s&p 500 s&p materials s&p aerospace & defense s&p industrials cumulative total return based upon an initial investment of $ 100 at december 31 , 2013 with dividends reinvested 12/13 12/14 12/15 12/16 12/17 12/18 period ending copyright a9 2019 standard & poor's , a division of s&p global . all rights reserved. .

Financial table:
as of december 31,: arconic inc .; 2013: $ 100; 2014: $ 149.83; 2015: $ 94.62; 2016: $ 80.22; 2017: $ 119.02; 2018: $ 74.47
as of december 31,: s&p 500 aeindex; 2013: 100; 2014: 113.69; 2015: 115.26; 2016: 129.05; 2017: 157.22; 2018: 150.33
as of december 31,: s&p 500 aematerials index; 2013: 100; 2014: 106.91; 2015: 97.95; 2016: 114.30; 2017: 141.55; 2018: 120.74
as of december 31,: s&p aerospace & defense select industry index; 2013: 100; 2014: 111.43; 2015: 117.49; 2016: 139.70; 2017: 197.50; 2018: 181.56
as of december 31,: s&p 500 aeindustrials index; 2013: 100; 2014: 109.83; 2015: 107.04; 2016: 127.23; 2017: 153.99; 2018: 133.53

Additional report context:
s&p 500 ae index 100 113.69 115.26 129.05 157.22 150.33 s&p 500 ae materials index 100 106.91 97.95 114.30 141.55 120.74 s&p aerospace & defense select industry index 100 111.43 117.49 139.70 197.50 181.56 s&p 500 ae industrials index 100 109.83 107.04 127.23 153.99 133.53 .

Question: considering one year of investment , what is the variation between the return provided by arconic inc . and the one provided by s&p 500 aeindustrials index?
Answer: 40%