table of contents the following performance graph is not 201csoliciting material , 201d is not deemed filed with the sec , and is not to be incorporated by reference into any of valero 2019s filings under the securities act of 1933 or the securities exchange act of 1934 , as amended , respectively .this performance graph and the related textual information are based on historical data and are not indicative of future performance .the following line graph compares the cumulative total return 1 on an investment in our common stock against the cumulative total return of the s&p 500 composite index and an index of peer companies ( that we selected ) for the five-year period commencing december 31 , 2008 and ending december 31 , 2013 .our peer group comprises the following 11 companies : alon usa energy , inc. ; bp plc ; cvr energy , inc. ; delek us holdings , inc .( dk ) ; hollyfrontier corporation ; marathon petroleum corporation ; pbf energy inc .( pbf ) ; phillips 66 ; royal dutch shell plc ; tesoro corporation ; and western refining , inc .our peer group previously included hess corporation , but it has exited the refining business , and was replaced in our peer group by dk and pbf who are also engaged in refining operations .comparison of 5 year cumulative total return1 among valero energy corporation , the s&p 500 index , old peer group , and new peer group .                     | 12/2008  | 12/2009 | 12/2010  | 12/2011  | 12/2012  | 12/2013 
valero common stock | $ 100.00 | $ 79.77 | $ 111.31 | $ 102.57 | $ 170.45 | $ 281.24
s&p 500             | 100.00   | 126.46  | 145.51   | 148.59   | 172.37   | 228.19  
old peer group      | 100.00   | 126.98  | 122.17   | 127.90   | 138.09   | 170.45  
new peer group      | 100.00   | 127.95  | 120.42   | 129.69   | 136.92   | 166.57   ____________ 1 assumes that an investment in valero common stock and each index was $ 100 on december 31 , 2008 .201ccumulative total return 201d is based on share price appreciation plus reinvestment of dividends from december 31 , 2008 through december 31 , 2013. .
Question: what is the value of an investment in valero common stock	in 2010?
Steps: Ask for number 111.31
Answer: 111.31
Question: what about in 2009?

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.
table of contents the following performance graph is not 201csoliciting material , 201d is not deemed filed with the sec , and is not to be incorporated by reference into any of valero 2019s filings under the securities act of 1933 or the securities exchange act of 1934 , as amended , respectively .this performance graph and the related textual information are based on historical data and are not indicative of future performance .the following line graph compares the cumulative total return 1 on an investment in our common stock against the cumulative total return of the s&p 500 composite index and an index of peer companies ( that we selected ) for the five-year period commencing december 31 , 2008 and ending december 31 , 2013 .our peer group comprises the following 11 companies : alon usa energy , inc. ; bp plc ; cvr energy , inc. ; delek us holdings , inc .( dk ) ; hollyfrontier corporation ; marathon petroleum corporation ; pbf energy inc .( pbf ) ; phillips 66 ; royal dutch shell plc ; tesoro corporation ; and western refining , inc .our peer group previously included hess corporation , but it has exited the refining business , and was replaced in our peer group by dk and pbf who are also engaged in refining operations .comparison of 5 year cumulative total return1 among valero energy corporation , the s&p 500 index , old peer group , and new peer group .                     | 12/2008  | 12/2009 | 12/2010  | 12/2011  | 12/2012  | 12/2013 
valero common stock | $ 100.00 | $ 79.77 | $ 111.31 | $ 102.57 | $ 170.45 | $ 281.24
s&p 500             | 100.00   | 126.46  | 145.51   | 148.59   | 172.37   | 228.19  
old peer group      | 100.00   | 126.98  | 122.17   | 127.90   | 138.09   | 170.45  
new peer group      | 100.00   | 127.95  | 120.42   | 129.69   | 136.92   | 166.57   ____________ 1 assumes that an investment in valero common stock and each index was $ 100 on december 31 , 2008 .201ccumulative total return 201d is based on share price appreciation plus reinvestment of dividends from december 31 , 2008 through december 31 , 2013. .
Question: what is the value of an investment in valero common stock	in 2010?
Steps: Ask for number 111.31
Answer: 111.31
Question: what about in 2009?
