RMCA vs. AMUN

Last updated Apr 7, 2026

Compare and contrast key facts about Rockefeller California Municipal Bond ETF (RMCA) and abrdn Ultra Short Municipal Income Active ETF (AMUN).

RMCA and AMUN are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. RMCA is an actively managed fund by Rockefeller. It was launched on Aug 12, 2024. AMUN is an actively managed fund by abrdn. It was launched on Oct 20, 2025.

Performance

RMCA vs. AMUN - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rockefeller California Municipal Bond ETF (RMCA) and abrdn Ultra Short Municipal Income Active ETF (AMUN). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RMCA achieves a 0.89% return, which is significantly higher than AMUN's 0.62% return.

RMCA

• 1D: -0.02%
• 1M: -0.15%
• YTD: 0.89%
• 6M: 1.79%
• 1Y: 2.03%
• 3Y*: —
• 5Y*: —
• 10Y*: —

AMUN

• 1D: 0.00%
• 1M: 0.04%
• YTD: 0.62%
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

RMCA vs. AMUN - Yearly Performance Comparison

	2026 (YTD)	2025
RMCA Rockefeller California Municipal Bond ETF	0.89%	-0.28%
AMUN abrdn Ultra Short Municipal Income Active ETF	0.62%	0.14%

Correlation

The correlation between RMCA and AMUN is 0.32, which is low. Their price movements are largely independent, making them effective diversification partners. Combining low-correlation assets is one of the most reliable ways to reduce portfolio risk without sacrificing expected returns.

RMCA vs. AMUN - Expense Ratio Comparison

RMCA has a 0.55% expense ratio, which is higher than AMUN's 0.25% expense ratio.

RMCA

Rockefeller California Municipal Bond ETF

AMUN

abrdn Ultra Short Municipal Income Active ETF

Return for Risk

RMCA vs. AMUN — Risk / Return Rank

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

RMCA

RMCA Risk / Return Rank: 17
RMCA Sharpe Ratio Rank: 16
RMCA Sortino Ratio Rank: 14
RMCA Omega Ratio Rank: 16
RMCA Calmar Ratio Rank: 19
RMCA Martin Ratio Rank: 17

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.

RMCA vs. AMUN - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rockefeller California Municipal Bond ETF (RMCA) and abrdn Ultra Short Municipal Income Active ETF (AMUN). 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.

	RMCA	AMUN	Difference
Sharpe ratio Return per unit of total volatility	0.36	—	—
Sortino ratio Return per unit of downside risk	0.48	—	—
Omega ratio Gain probability vs. loss probability	1.08	—	—
Calmar ratio Return relative to maximum drawdown	0.56	—	—
Martin ratio Return relative to average drawdown	1.22	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	RMCA	AMUN	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.36	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.34	1.54	-1.19

Drawdowns

RMCA vs. AMUN - Drawdown Comparison

The maximum RMCA drawdown since its inception was -5.95%, which is greater than AMUN's maximum drawdown of -0.61%. Use the drawdown chart below to compare losses from any high point for RMCA and AMUN.

Drawdown Indicators

	RMCA	AMUN	Difference
Max Drawdown Largest peak-to-trough decline	-5.95%	-0.61%	-5.34%
Max Drawdown (1Y) Largest decline over 1 year	-2.97%	—	—
Current Drawdown Current decline from peak	-1.02%	0.00%	-1.02%
Average Drawdown Average peak-to-trough decline	-1.76%	-0.11%	-1.65%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.34%	—	—

Volatility

Volatility by Period

	RMCA	AMUN	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.72%	—	—
Volatility (6M) Calculated over the trailing 6-month period	2.37%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	5.76%	1.11%	+4.65%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.55%	1.11%	+4.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.55%	1.11%	+4.44%

Dividends

RMCA vs. AMUN - Dividend Comparison

RMCA's dividend yield for the trailing twelve months is around 4.47%, more than AMUN's 1.39% yield.

	TTM	2025	2024
RMCA Rockefeller California Municipal Bond ETF	4.47%	4.51%	1.20%
AMUN abrdn Ultra Short Municipal Income Active ETF	1.39%	0.66%	0.00%