VNDFX vs. VMTTX

Last updated Jun 3, 2026

VNDFX (Viking Tax-Free Fund for North Dakota) and VMTTX (Viking Tax-Free Fund For Montana) are both Municipal Bonds funds from IntegrityVikingFunds. Over the past 10 years, VNDFX returned 0.67%/yr vs 1.18%/yr for VMTTX. Their correlation of 0.88 suggests significant overlap in exposure. Both charge a 0.98% expense ratio.

Performance

VNDFX vs. VMTTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Viking Tax-Free Fund for North Dakota (VNDFX) and Viking Tax-Free Fund For Montana (VMTTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VNDFX achieves a 1.74% return, which is significantly higher than VMTTX's 1.53% return. Over the past 10 years, VNDFX has underperformed VMTTX with an annualized return of 0.67%, while VMTTX has yielded a comparatively higher 1.18% annualized return.

VNDFX

• 1D: 0.00%
• 1M: 0.36%
• YTD: 1.74%
• 6M: 2.12%
• 1Y: 7.34%
• 3Y*: 2.11%
• 5Y*: -0.62%
• 10Y*: 0.67%

VMTTX

• 1D: -0.11%
• 1M: 0.27%
• YTD: 1.53%
• 6M: 1.79%
• 1Y: 6.93%
• 3Y*: 2.69%
• 5Y*: 0.11%
• 10Y*: 1.18%

*Multi-year figures are annualized to reflect compound growth (CAGR)

VNDFX vs. VMTTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VNDFX Viking Tax-Free Fund for North Dakota	1.74%	3.02%	-1.96%	4.65%	-9.89%	0.42%	2.90%	5.12%	0.72%	3.35%
VMTTX Viking Tax-Free Fund For Montana	1.53%	3.71%	-0.16%	4.24%	-8.52%	0.28%	4.04%	5.59%	0.53%	4.00%

Correlation

The correlation between VNDFX and VMTTX is 0.91, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.88
Correlation (All Time) Calculated using the full available price history since Aug 4, 1999	0.88

The correlation between VNDFX and VMTTX has been stable across timeframes, ranging from 0.88 to 0.92 - a consistent structural relationship.

Return for Risk

VNDFX vs. VMTTX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

VNDFX

VNDFX Risk / Return Rank: 79
VNDFX Sharpe Ratio Rank: 90
VNDFX Sortino Ratio Rank: 93
VNDFX Omega Ratio Rank: 97
VNDFX Calmar Ratio Rank: 57
VNDFX Martin Ratio Rank: 59

VMTTX

VMTTX Risk / Return Rank: 80
VMTTX Sharpe Ratio Rank: 89
VMTTX Sortino Ratio Rank: 94
VMTTX Omega Ratio Rank: 97
VMTTX Calmar Ratio Rank: 59
VMTTX Martin Ratio Rank: 61

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

VNDFX vs. VMTTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Viking Tax-Free Fund for North Dakota (VNDFX) and Viking Tax-Free Fund For Montana (VMTTX). 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.

	VNDFX	VMTTX	Difference
Sharpe ratio Return per unit of total volatility	2.97	2.91	+0.06
Sortino ratio Return per unit of downside risk	4.78	4.90	-0.12
Omega ratio Gain probability vs. loss probability	1.94	2.00	-0.05
Calmar ratio Return relative to maximum drawdown	2.92	2.96	-0.05
Martin ratio Return relative to average drawdown	11.94	12.00	-0.06
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VNDFX vs. VMTTX - Sharpe Ratio Comparison

The current VNDFX Sharpe Ratio is 2.97, which is comparable to the VMTTX Sharpe Ratio of 2.91. The chart below compares the historical Sharpe Ratios of VNDFX and VMTTX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	VNDFX	VMTTX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.97	2.91	+0.06
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.13	0.03	-0.16
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.17	0.32	-0.16
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.48	-0.04

Drawdowns

VNDFX vs. VMTTX - Drawdown Comparison

The maximum VNDFX drawdown since its inception was -14.80%, which is greater than VMTTX's maximum drawdown of -13.11%. Use the drawdown chart below to compare losses from any high point for VNDFX and VMTTX.

Drawdown Indicators

	VNDFX	VMTTX	Difference
Max Drawdown Largest peak-to-trough decline	-14.80%	-13.11%	-1.69%
Max Drawdown (1Y) Largest decline over 1 year	-2.57%	-2.27%	-0.30%
Max Drawdown (3Y) Largest decline over 3 years	-8.01%	-5.55%	-2.46%
Max Drawdown (5Y) Largest decline over 5 years	-14.80%	-13.11%	-1.69%
Max Drawdown (10Y) Largest decline over 10 years	-14.80%	-13.11%	-1.69%
Current Drawdown Current decline from peak	-3.56%	-0.29%	-3.27%
Average Drawdown Average peak-to-trough decline	-2.77%	-2.49%	-0.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.63%	0.56%	+0.07%

Volatility

VNDFX vs. VMTTX - Volatility Comparison

Viking Tax-Free Fund for North Dakota (VNDFX) has a higher volatility of 0.88% compared to Viking Tax-Free Fund For Montana (VMTTX) at 0.79%. This indicates that VNDFX's price experiences larger fluctuations and is considered to be riskier than VMTTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VNDFX	VMTTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.88%	0.79%	+0.09%
Volatility (6M) Calculated over the trailing 6-month period	1.83%	1.62%	+0.21%
Volatility (1Y) Calculated over the trailing 1-year period	2.44%	2.23%	+0.21%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.61%	3.84%	+0.77%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.04%	3.66%	+0.38%

VNDFX vs. VMTTX - Expense Ratio Comparison

Both VNDFX and VMTTX have an expense ratio of 0.98%.

Dividends

VNDFX vs. VMTTX - Dividend Comparison

VNDFX's dividend yield for the trailing twelve months is around 3.01%, more than VMTTX's 2.98% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VMTTX Viking Tax-Free Fund For Montana	2.98%	2.93%	2.81%	2.47%	2.06%	1.55%	1.89%	2.63%	2.52%	2.61%	2.77%	2.62%
VNDFX Viking Tax-Free Fund for North Dakota	3.01%	3.03%	2.93%	2.30%	1.86%	1.69%	2.07%	2.72%	2.58%	2.71%	2.62%	2.38%

Frequently Asked Questions

Can I hold both VNDFX and VMTTX in my portfolio?

With a correlation of 0.91, VNDFX and VMTTX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, VNDFX or VMTTX?

VNDFX has higher volatility (0.88%) compared to VMTTX (0.79%). In terms of maximum drawdown, VNDFX dropped -14.80% vs VMTTX's -13.11%.

Which has better risk-adjusted returns?

VNDFX currently has the higher Sharpe Ratio (2.97 vs 2.91), 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.