Please answer the given financial question based on the context.
Context: shareholder return performance the line graph below compares the annual percentage change in ball corporation fffds cumulative total shareholder return on its common stock with the cumulative total return of the dow jones containers & packaging index and the s&p composite 500 stock index for the five-year period ended december 31 , 2011 . it assumes $ 100 was invested on december 31 , 2006 , and that all dividends were reinvested . the dow jones containers & packaging index total return has been weighted by market capitalization . total return to stockholders ( assumes $ 100 investment on 12/31/06 ) total return analysis .
||12/31/2006|12/31/2007|12/31/2008|12/31/2009|12/31/2010|12/31/2011|
|ball corporation|$ 100.00|$ 104.05|$ 97.04|$ 121.73|$ 161.39|$ 170.70|
|dj us containers & packaging|$ 100.00|$ 106.73|$ 66.91|$ 93.98|$ 110.23|$ 110.39|
|s&p 500|$ 100.00|$ 105.49|$ 66.46|$ 84.05|$ 96.71|$ 98.75|
copyright a9 2012 standard & poor fffds , a division of the mcgraw-hill companies inc . all rights reserved . ( www.researchdatagroup.com/s&p.htm ) copyright a9 2012 dow jones & company . all rights reserved. .
Question: what is the roi of an investment in dj us containers & packaging from 2006 to 2008?
Answer:
-0.3309