MFSB vs. CAAA

Last updated Jun 4, 2026

MFSB (MFS Active Core Plus Bond ETF) and CAAA (First Trust Commercial Mortgage Opportunities ETF) are both Intermediate Core-Plus Bond funds. Both are actively managed. Over the past year, MFSB returned 6.16% vs 5.28% for CAAA. A 0.72 correlation means they provide meaningful diversification when combined. MFSB charges 0.34%/yr vs 0.55%/yr for CAAA.

Performance

MFSB vs. CAAA - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Active Core Plus Bond ETF (MFSB) and First Trust Commercial Mortgage Opportunities ETF (CAAA). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

As of year-to-date, both investments have demonstrated similar returns, with MFSB at 0.56% and CAAA at 0.56%.

MFSB

• 1D: -0.26%
• 1M: 0.38%
• YTD: 0.56%
• 6M: 0.61%
• 1Y: 6.16%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CAAA

• 1D: -0.34%
• 1M: -0.12%
• YTD: 0.56%
• 6M: 0.55%
• 1Y: 5.28%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MFSB vs. CAAA - Yearly Performance Comparison

	2026 (YTD)	2025	2024
MFSB MFS Active Core Plus Bond ETF	0.56%	7.40%	-1.50%
CAAA First Trust Commercial Mortgage Opportunities ETF	0.56%	8.03%	-0.57%

Correlation

The correlation between MFSB and CAAA is 0.71, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.71
Correlation (All Time) Calculated using the full available price history since Dec 6, 2024	0.72

The correlation between MFSB and CAAA has been stable across timeframes, ranging from 0.71 to 0.72 - a consistent structural relationship.

Return for Risk

MFSB vs. CAAA — Risk / Return Rank

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

MFSB

MFSB Risk / Return Rank: 49
MFSB Sharpe Ratio Rank: 50
MFSB Sortino Ratio Rank: 53
MFSB Omega Ratio Rank: 49
MFSB Calmar Ratio Rank: 47
MFSB Martin Ratio Rank: 44

CAAA

CAAA Risk / Return Rank: 51
CAAA Sharpe Ratio Rank: 50
CAAA Sortino Ratio Rank: 55
CAAA Omega Ratio Rank: 51
CAAA Calmar Ratio Rank: 52
CAAA Martin Ratio Rank: 47

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.

MFSB vs. CAAA - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Active Core Plus Bond ETF (MFSB) and First Trust Commercial Mortgage Opportunities ETF (CAAA). 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.

	MFSB	CAAA	Difference
Sharpe ratio: Return per unit of total volatility	1.70	1.73	-0.03
Sortino ratio: Return per unit of downside risk	2.51	2.62	-0.11
Omega ratio: Gain probability vs. loss probability	1.30	1.32	-0.02
Calmar ratio: Return relative to maximum drawdown	2.28	2.55	-0.26
Martin ratio: Return relative to average drawdown	7.17	7.88	-0.72
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MFSB vs. CAAA - Sharpe Ratio Comparison

The current MFSB Sharpe Ratio is 1.70, which is comparable to the CAAA Sharpe Ratio of 1.73. The chart below compares the historical Sharpe Ratios of MFSB and CAAA, 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

	MFSB	CAAA	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.70	1.73	-0.03
Sharpe Ratio (All Time) Calculated using the full available price history	1.01	1.83	-0.82

Drawdowns

MFSB vs. CAAA - Drawdown Comparison

The maximum MFSB drawdown since its inception was -3.19%, which is greater than CAAA's maximum drawdown of -2.24%. Use the drawdown chart below to compare losses from any high point for MFSB and CAAA.

Drawdown Indicators

	MFSB	CAAA	Difference
Max Drawdown Largest peak-to-trough decline	-3.19%	-2.24%	-0.95%
Max Drawdown (1Y) Largest decline over 1 year	-2.71%	-2.08%	-0.63%
Current Drawdown Current decline from peak	-1.26%	-1.04%	-0.22%
Average Drawdown Average peak-to-trough decline	-0.82%	-0.56%	-0.26%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.86%	0.67%	+0.19%

Volatility

MFSB vs. CAAA - Volatility Comparison

MFS Active Core Plus Bond ETF (MFSB) has a higher volatility of 1.33% compared to First Trust Commercial Mortgage Opportunities ETF (CAAA) at 1.04%. This indicates that MFSB's price experiences larger fluctuations and is considered to be riskier than CAAA based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFSB	CAAA	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.33%	1.04%	+0.29%
Volatility (6M) Calculated over the trailing 6-month period	2.68%	2.16%	+0.52%
Volatility (1Y) Calculated over the trailing 1-year period	3.64%	3.07%	+0.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.23%	3.21%	+1.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.23%	3.21%	+1.02%

MFSB vs. CAAA - Expense Ratio Comparison

MFSB has a 0.34% expense ratio, which is lower than CAAA's 0.55% expense ratio.

Dividends

MFSB vs. CAAA - Dividend Comparison

MFSB's dividend yield for the trailing twelve months is around 4.59%, less than CAAA's 5.30% yield.

Position	TTM	2025	2024
CAAA First Trust Commercial Mortgage Opportunities ETF	5.30%	6.09%	4.01%
MFSB MFS Active Core Plus Bond ETF	4.59%	4.58%	0.37%

Frequently Asked Questions

Can I hold both MFSB and CAAA in my portfolio?

MFSB and CAAA have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MFSB or CAAA?

MFSB has higher volatility (1.33%) compared to CAAA (1.04%). In terms of maximum drawdown, MFSB dropped -3.19% vs CAAA's -2.24%.

Which ETF is better, MFSB or CAAA?

On 1-year performance, MFSB leads with 6.16% vs 5.28% for CAAA. On fees, MFSB is cheaper at 0.34% per year. On volatility, CAAA has been the lower-risk option at 1.04%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MFSB or CAAA?

Over the 1-year period, MFSB has performed better with a 6.16% return vs 5.28%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MFSB or CAAA?

MFSB is cheaper with a 0.34% expense ratio, compared with 0.55% for CAAA.

Which ETF pays a higher dividend yield, MFSB or CAAA?

CAAA has the higher dividend yield at 5.30%, compared with 4.59% for MFSB.

What is the main difference between MFSB and CAAA?

They also come from different issuers: MFS and First Trust. Their fees differ too: 0.34% for MFSB and 0.55% for CAAA.

Which has better risk-adjusted returns?

CAAA currently has the higher Sharpe Ratio (1.73 vs 1.70), 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.