2 0 0 8 a n n u a l r e p o r t stock performance graph the following graph sets forth the performance of our series a common , series b common stock , and series c common stock for the period september 18 , 2008 through december 31 , 2008 as compared with the performance of the standard and poor 2019s 500 index and a peer group index which consists of the walt disney company , time warner inc. , cbs corporation class b common stock , viacom , inc . class b common stock , news corporation class a common stock , and scripps network interactive , inc . the graph assumes $ 100 originally invested on september 18 , 2006 and that all subsequent dividends were reinvested in additional shares . september 18 , september 30 , december 31 , 2008 2008 2008 .
s&p 500 peer group .
September 18,   2008 September 30,   2008 December 31,   2008
DISCA $100.00 $103.19 $102.53
DISCB $100.00 $105.54 $78.53
DISCK $100.00 $88.50 $83.69
S&P 500 $100.00 $96.54 $74.86
Peer Group $100.00 $92.67 $68.79
september 18 2008 september 30 2008 december 31 2008
disca $ 100.00 $ 103.19 $ 102.53
discb $ 100.00 $ 105.54 $ 78.53
disck $ 100.00 $ 88.50 $ 83.69
s&p 500 $ 100.00 $ 96.54 $ 74.86
peer group $ 100.00 $ 92.67 $ 68.79
what was the percentage cumulative total shareholder return on disca common stock from september 18 , 2008 to december 31 , 2008?