COTFX vs. NMI
COTFX (Aquila Tax-Free Fund of Colorado) and NMI (Nuveen Municipal Income Fund, Inc.) are both Municipal Bonds funds. Over the past 10 years, COTFX returned 0.96%/yr vs 2.60%/yr for NMI. Their 0.14 correlation means their historical movements had little consistent relationship. Both charge a 0.72% expense ratio.
Performance
COTFX vs. NMI - Performance Comparison
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Returns By Period
In the year-to-date period, COTFX achieves a 0.31% return, which is significantly lower than NMI's 11.94% return. Over the past 10 years, COTFX has underperformed NMI with an annualized return of 0.96%, while NMI has yielded a comparatively higher 2.60% annualized return.
COTFX
- 1D
- -0.21%
- 1M
- -1.94%
- 6M
- -0.69%
- YTD
- 0.31%
- 1Y
- 4.53%
- 3Y*
- 2.28%
- 5Y*
- 0.07%
- 10Y*
- 0.96%
- ALL TIME*
- 3.26%
NMI
- 1D
- -0.39%
- 1M
- -0.57%
- 6M
- 11.08%
- YTD
- 11.94%
- 1Y
- 14.80%
- 3Y*
- 8.35%
- 5Y*
- 2.23%
- 10Y*
- 2.60%
- ALL TIME*
- 5.26%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $223.63K | $190.25K | $203.93K |
COTFX vs. NMI - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
COTFX Aquila Tax-Free Fund of Colorado | 0.31% | 3.71% | 0.38% | 3.61% | -6.53% | -0.55% | 3.80% | 5.19% | 0.66% | 2.73% |
NMI Nuveen Municipal Income Fund, Inc. | 11.94% | 10.52% | 7.03% | 1.90% | -15.09% | 3.86% | 4.70% | 16.02% | -8.07% | 7.49% |
Correlation
The correlation between COTFX and NMI is 0.11, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.11 |
Correlation (3Y) Balances recent behavior with more history. | 0.25 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.25 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.20 |
Correlation (All Time) Calculated using the full available price history since Jun 20, 1996 | 0.14 |
The correlation between COTFX and NMI shifts across timeframes, from 0.11 (1 year) to 0.25 (5 years), reflecting how their relationship changes across market environments.
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Return for Risk
COTFX vs. NMI — Risk / Return Rank
COTFX
NMI
COTFX vs. NMI - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Aquila Tax-Free Fund of Colorado (COTFX) and Nuveen Municipal Income Fund, Inc. (NMI). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| COTFX | NMI | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.12 | ||
| Sortino ratioReturn per unit of downside risk | +1.58 | ||
| Omega ratioGain probability vs. loss probability | 1.48 | 1.24 | +0.25 |
| Calmar ratioReturn relative to maximum drawdown | 1.88 | 1.33 | +0.55 |
| Martin ratioReturn relative to average drawdown | 6.04 | 6.00 | +0.04 |
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Drawdowns
COTFX vs. NMI - Drawdown Comparison
The maximum COTFX drawdown since its inception was -10.44%, smaller than the maximum NMI drawdown of -28.92%. Use the drawdown chart below to compare losses from any high point for COTFX and NMI.
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Drawdown Indicators
| COTFX | NMI | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -10.44% | -28.92% | +18.48% |
Max Drawdown (1Y)Largest decline over 1 year | -2.83% | -10.96% | +8.13% |
Max Drawdown (3Y)Largest decline over 3 years | -4.55% | -11.32% | +6.77% |
Max Drawdown (5Y)Largest decline over 5 years | -10.36% | -28.92% | +18.56% |
Max Drawdown (10Y)Largest decline over 10 years | -10.44% | -28.92% | +18.48% |
Current DrawdownCurrent decline from peak | -1.94% | -2.56% | +0.62% |
Average DrawdownAverage peak-to-trough decline | -1.52% | -5.91% | +4.39% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.88% | 2.44% | -1.56% |
Volatility
COTFX vs. NMI - Volatility Comparison
The current volatility for Aquila Tax-Free Fund of Colorado (COTFX) is 0.92%, while Nuveen Municipal Income Fund, Inc. (NMI) has a volatility of 2.25%. This indicates that COTFX experiences smaller price fluctuations and is considered to be less risky than NMI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| COTFX | NMI | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.92% | 2.25% | -1.33% |
Volatility (6M)Calculated over the trailing 6-month period | 2.08% | 14.84% | -12.76% |
Volatility (1Y)Calculated over the trailing 1-year period | 2.59% | 15.57% | -12.98% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 2.94% | 14.71% | -11.77% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.01% | 15.04% | -12.03% |
COTFX vs. NMI - Expense Ratio Comparison
Both COTFX and NMI have an expense ratio of 0.72%.
Dividends
COTFX vs. NMI - Dividend Comparison
COTFX's dividend yield for the trailing twelve months is around 3.10%, less than NMI's 4.21% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
COTFX Aquila Tax-Free Fund of Colorado | 3.10% | 3.28% | 2.42% | 1.99% | 1.32% | 1.42% | 1.75% | 2.46% | 2.38% | 2.52% | 2.68% | 2.94% |
NMI Nuveen Municipal Income Fund, Inc. | 4.21% | 4.59% | 4.63% | 4.04% | 3.51% | 3.22% | 3.53% | 4.15% | 5.12% | 4.21% | 4.45% | 4.28% |
Frequently Asked Questions
COTFX and NMI have a correlation of 0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
NMI has higher volatility (2.25%) compared to COTFX (0.92%). In terms of maximum drawdown, COTFX dropped -10.44% vs NMI's -28.92%.
COTFX currently has the higher Sharpe Ratio (2.06 vs 0.94), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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