COII vs. DFNM

Last updated Jun 4, 2026

COII (REX COIN Growth & Income ETF) and DFNM (Dimensional National Municipal Bond ETF) are both exchange-traded funds - COII is a Derivative Income fund actively managed by REX Shares, while DFNM is a Municipal Bonds fund actively managed by Dimensional. Both are actively managed. At a correlation of -0.09, they often move in opposite directions. COII charges 0.99%/yr vs 0.17%/yr for DFNM.

Performance

COII vs. DFNM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in REX COIN Growth & Income ETF (COII) and Dimensional National Municipal Bond ETF (DFNM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COII achieves a -37.80% return, which is significantly lower than DFNM's 1.29% return.

COII

• 1D: -7.35%
• 1M: -19.57%
• YTD: -37.80%
• 6M: -48.84%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

DFNM

• 1D: 0.02%
• 1M: 0.42%
• YTD: 1.29%
• 6M: 1.71%
• 1Y: 5.29%
• 3Y*: 3.40%
• 5Y*: —
• 10Y*: —

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

COII vs. DFNM - Yearly Performance Comparison

	2026 (YTD)	2025
COII REX COIN Growth & Income ETF	-37.80%	-25.89%
DFNM Dimensional National Municipal Bond ETF	1.29%	3.83%

Correlation

The correlation between COII and DFNM is -0.09, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (All Time) Calculated using the full available price history since Jun 5, 2025	-0.09

Return for Risk

COII vs. DFNM — Risk / Return Rank

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

DFNM

DFNM Risk / Return Rank: 79
DFNM Sharpe Ratio Rank: 89
DFNM Sortino Ratio Rank: 91
DFNM Omega Ratio Rank: 94
DFNM Calmar Ratio Rank: 59
DFNM Martin Ratio Rank: 59

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.

COII vs. DFNM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for REX COIN Growth & Income ETF (COII) and Dimensional National Municipal Bond ETF (DFNM). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	COII	DFNM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	3.03	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.79	0.57	-1.37

Drawdowns

COII vs. DFNM - Drawdown Comparison

The maximum COII drawdown since its inception was -72.22%, which is greater than DFNM's maximum drawdown of -6.99%. Use the drawdown chart below to compare losses from any high point for COII and DFNM.

Drawdown Indicators

	COII	DFNM	Difference
Max Drawdown Largest peak-to-trough decline	-72.22%	-6.99%	-65.23%
Max Drawdown (1Y) Largest decline over 1 year	—	-1.84%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-2.82%	—
Current Drawdown Current decline from peak	-69.04%	-0.36%	-68.68%
Average Drawdown Average peak-to-trough decline	-39.11%	-1.96%	-37.15%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.51%	—

Volatility

Volatility by Period

	COII	DFNM	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.58%	—
Volatility (6M) Calculated over the trailing 6-month period	—	1.29%	—
Volatility (1Y) Calculated over the trailing 1-year period	68.48%	1.75%	+66.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	68.48%	2.54%	+65.94%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	68.48%	2.54%	+65.94%

COII vs. DFNM - Expense Ratio Comparison

COII has a 0.99% expense ratio, which is higher than DFNM's 0.17% expense ratio.

Dividends

COII vs. DFNM - Dividend Comparison

COII's dividend yield for the trailing twelve months is around 92.44%, more than DFNM's 2.89% yield.

Position	TTM	2025	2024	2023	2022	2021
COII REX COIN Growth & Income ETF	92.44%	41.52%	0.00%	0.00%	0.00%	0.00%
DFNM Dimensional National Municipal Bond ETF	2.89%	2.94%	2.74%	2.39%	1.16%	0.05%

Frequently Asked Questions

Can I hold both COII and DFNM in my portfolio?

COII and DFNM have a correlation of -0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, COII or DFNM?

On fees, DFNM is cheaper at 0.17% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, COII or DFNM?

DFNM is cheaper with a 0.17% expense ratio, compared with 0.99% for COII.

Which ETF pays a higher dividend yield, COII or DFNM?

COII has the higher dividend yield at 92.44%, compared with 2.89% for DFNM.

What is the main difference between COII and DFNM?

COII is categorized as Derivative Income, while DFNM is Municipal Bonds. They also come from different issuers: REX Shares and Dimensional. Their fees differ too: 0.99% for COII and 0.17% for DFNM.