CPLS vs. MAMB

Last updated Jun 3, 2026

CPLS (AB Core Plus Bond ETF) and MAMB (Monarch Ambassador Income ETF) are both Intermediate Core-Plus Bond funds. CPLS is actively managed, while MAMB is passively managed. Over the past year, CPLS returned 5.29% vs 9.58% for MAMB. Their correlation of 0.88 suggests significant overlap in exposure. CPLS charges 0.33%/yr vs 1.49%/yr for MAMB.

Performance

CPLS vs. MAMB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AB Core Plus Bond ETF (CPLS) and Monarch Ambassador Income ETF (MAMB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPLS achieves a 0.53% return, which is significantly lower than MAMB's 2.27% return.

CPLS

• 1D: -0.10%
• 1M: 0.02%
• YTD: 0.53%
• 6M: 0.48%
• 1Y: 5.29%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MAMB

• 1D: 0.15%
• 1M: 0.52%
• YTD: 2.27%
• 6M: 2.40%
• 1Y: 9.58%
• 3Y*: 5.46%
• 5Y*: 0.85%
• 10Y*: —

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

CPLS vs. MAMB - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
CPLS AB Core Plus Bond ETF	0.53%	6.91%	1.65%	1.21%
MAMB Monarch Ambassador Income ETF	2.27%	10.69%	1.32%	1.23%

Correlation

The correlation between CPLS and MAMB is 0.81, 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	0.81
Correlation (All Time) Calculated using the full available price history since Dec 14, 2023	0.88

The correlation between CPLS and MAMB has been stable across timeframes, ranging from 0.81 to 0.88 - a consistent structural relationship.

Return for Risk

CPLS vs. MAMB — Risk / Return Rank

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

CPLS

CPLS Risk / Return Rank: 39
CPLS Sharpe Ratio Rank: 38
CPLS Sortino Ratio Rank: 40
CPLS Omega Ratio Rank: 36
CPLS Calmar Ratio Rank: 41
CPLS Martin Ratio Rank: 40

MAMB

MAMB Risk / Return Rank: 48
MAMB Sharpe Ratio Rank: 48
MAMB Sortino Ratio Rank: 48
MAMB Omega Ratio Rank: 47
MAMB Calmar Ratio Rank: 53
MAMB Martin Ratio Rank: 45

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.

CPLS vs. MAMB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AB Core Plus Bond ETF (CPLS) and Monarch Ambassador Income ETF (MAMB). 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.

	CPLS	MAMB	Difference
Sharpe ratio Return per unit of total volatility	1.37	1.70	-0.32
Sortino ratio Return per unit of downside risk	2.08	2.38	-0.30
Omega ratio Gain probability vs. loss probability	1.24	1.30	-0.06
Calmar ratio Return relative to maximum drawdown	2.07	2.68	-0.61
Martin ratio Return relative to average drawdown	6.52	7.61	-1.09
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CPLS vs. MAMB - Sharpe Ratio Comparison

The current CPLS Sharpe Ratio is 1.37, which is comparable to the MAMB Sharpe Ratio of 1.70. The chart below compares the historical Sharpe Ratios of CPLS and MAMB, 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

	CPLS	MAMB	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.37	1.70	-0.32
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.12	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.87	0.17	+0.70

Drawdowns

CPLS vs. MAMB - Drawdown Comparison

The maximum CPLS drawdown since its inception was -4.43%, smaller than the maximum MAMB drawdown of -19.33%. Use the drawdown chart below to compare losses from any high point for CPLS and MAMB.

Drawdown Indicators

	CPLS	MAMB	Difference
Max Drawdown Largest peak-to-trough decline	-4.43%	-19.33%	+14.90%
Max Drawdown (1Y) Largest decline over 1 year	-2.47%	-3.55%	+1.08%
Max Drawdown (3Y) Largest decline over 3 years	—	-7.38%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-19.33%	—
Current Drawdown Current decline from peak	-1.03%	-1.40%	+0.37%
Average Drawdown Average peak-to-trough decline	-1.24%	-7.51%	+6.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.78%	1.25%	-0.47%

Volatility

CPLS vs. MAMB - Volatility Comparison

The current volatility for AB Core Plus Bond ETF (CPLS) is 1.42%, while Monarch Ambassador Income ETF (MAMB) has a volatility of 1.74%. This indicates that CPLS experiences smaller price fluctuations and is considered to be less risky than MAMB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPLS	MAMB	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.42%	1.74%	-0.32%
Volatility (6M) Calculated over the trailing 6-month period	2.88%	4.23%	-1.35%
Volatility (1Y) Calculated over the trailing 1-year period	3.87%	5.67%	-1.80%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.82%	6.99%	-2.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.82%	6.91%	-2.09%

CPLS vs. MAMB - Expense Ratio Comparison

CPLS has a 0.33% expense ratio, which is lower than MAMB's 1.49% expense ratio.

Dividends

CPLS vs. MAMB - Dividend Comparison

CPLS's dividend yield for the trailing twelve months is around 4.61%, more than MAMB's 2.43% yield.

Position	TTM	2025	2024	2023	2022	2021
CPLS AB Core Plus Bond ETF	4.61%	4.66%	4.71%	0.23%	0.00%	0.00%
MAMB Monarch Ambassador Income ETF	2.43%	2.47%	2.11%	1.73%	0.92%	0.56%

Frequently Asked Questions

Can I hold both CPLS and MAMB in my portfolio?

CPLS and MAMB have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPLS or MAMB?

MAMB has higher volatility (1.74%) compared to CPLS (1.42%). In terms of maximum drawdown, CPLS dropped -4.43% vs MAMB's -19.33%.

Which ETF is better, CPLS or MAMB?

On 1-year performance, MAMB leads with 9.58% vs 5.29% for CPLS. On fees, CPLS is cheaper at 0.33% per year. On volatility, CPLS has been the lower-risk option at 1.42%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CPLS or MAMB?

Over the 1-year period, MAMB has performed better with a 9.58% return vs 5.29%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CPLS or MAMB?

CPLS is cheaper with a 0.33% expense ratio, compared with 1.49% for MAMB.

Which ETF pays a higher dividend yield, CPLS or MAMB?

CPLS has the higher dividend yield at 4.61%, compared with 2.43% for MAMB.

What is the main difference between CPLS and MAMB?

They also come from different issuers: AllianceBernstein and Monarch. Their fees differ too: 0.33% for CPLS and 1.49% for MAMB.

Which has better risk-adjusted returns?

MAMB currently has the higher Sharpe Ratio (1.70 vs 1.37), 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.