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American Century Long-Term Tax-Free B (MMDBX)On Jan 7: 10.85   0.00 (0.00%)  
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Risk  As of 30-Nov-09Get Risk for:
RISK OVERVIEW 
Morningstar Risk Rating:Average
Number of Years Up:4
Number of Years Down:1
Best 1 Yr Total Return (2006):3.68%
Worst 1 Yr Total Return (2008):-2.61%
RISK (MODERN PORTFOLIO THEORY) STATISTICS 
3 Years
StatisticMMDBXCategory
Alpha (against Standard Index)-1.77-2.38
Beta (against Standard Index)1.061.16
Mean Annual Return2.440.19
R-squared (against Standard Index)9787.38
Standard Deviation6.467.62
Sharpe Ratio0.06N/A
Treynor Ratio0.16N/A
5 Years
StatisticMMDBXCategory
Alpha (against Standard Index)-1.57-1.54
Beta (against Standard Index)1.061.15
Mean Annual Return2.960.27
R-squared (against Standard Index)9787.54
Standard Deviation5.276.12
Sharpe Ratio0.02N/A
Treynor Ratio-0.02N/A
10 Years
StatisticMMDBXCategory
Alpha (against Standard Index)-1.31-1.35
Beta (against Standard Index)1.071.11
Mean Annual Return4.450.38
R-squared (against Standard Index)9788.56
Standard Deviation5.085.58
Sharpe Ratio0.31N/A
Treynor Ratio1.42N/A

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