what was the mathematical range for all four groups in 12/2010 , assuming investments of $ 100 initially in 2008?
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 , 2007 and ending december 31 , 2012 . our peer group consists of the following ten companies : alon usa energy , inc. ; bp plc ( bp ) ; cvr energy , inc. ; hess corporation ; hollyfrontier corporation ; marathon petroleum corporation ; phillips 66 ( psx ) ; royal dutch shell plc ( rds ) ; tesoro corporation ; and western refining , inc . our peer group previously included chevron corporation ( cvx ) and exxon mobil corporation ( xom ) but they were replaced with bp , psx , and rds . in 2012 , psx became an independent downstream energy company and was added to our peer group . cvx and xom were replaced with bp and rds as they were viewed as having operations that more closely aligned with our core businesses . comparison of 5 year cumulative total return1 among valero energy corporation , the s&p 500 index , old peer group , and new peer group .

|  | 12/2007 | 12/2008 | 12/2009 | 12/2010 | 12/2011 | 12/2012 |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| Valero Common Stock | $100.00 | $31.45 | $25.09 | $35.01 | $32.26 | $53.61 |
| S&P 500 | 100.00 | 63.00 | 79.67 | 91.67 | 93.61 | 108.59 |
| Old Peer Group | 100.00 | 80.98 | 76.54 | 88.41 | 104.33 | 111.11 |
| New Peer Group | 100.00 | 66.27 | 86.87 | 72.84 | 74.70 | 76.89 |

____________ 1 assumes that an investment in valero common stock and each index was $ 100 on december 31 , 2007 . 201ccumulative total return 201d is based on share price appreciation plus reinvestment of dividends from december 31 , 2007 through december 31 , 2012. .

valero_return = 91.67
snp_return = 35.01
old_peer_return = 88.41
new_peer_return = 72.84
answer = max(valero_return, snp_return, old_peer_return, new_peer_return) - min(valero_return, snp_return, old_peer_return, new_peer_return)