MFSB vs. COMT

Last updated Jun 23, 2026

MFSB (MFS Active Core Plus Bond ETF) and COMT (iShares GSCI Commodity Dynamic Roll Strategy ETF) are both exchange-traded funds - MFSB is a Intermediate Core-Plus Bond fund actively managed by MFS, while COMT is a Commodities fund tracking the S&P GSCI Dynamic Roll (USD) Total Return Index. MFSB is actively managed, while COMT is passively managed. Over the past year, MFSB returned 5.22% vs 21.95% for COMT. At a correlation of -0.27, they often move in opposite directions. MFSB charges 0.34%/yr vs 0.48%/yr for COMT.

Performance

MFSB vs. COMT - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Active Core Plus Bond ETF (MFSB) and iShares GSCI Commodity Dynamic Roll Strategy ETF (COMT). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MFSB achieves a 0.84% return, which is significantly lower than COMT's 25.05% return.

MFSB

• 1D: -0.24%
• 1M: 0.91%
• YTD: 0.84%
• 6M: 1.07%
• 1Y: 5.22%
• 3Y*: —
• 5Y*: —
• 10Y*: —

COMT

• 1D: -0.76%
• 1M: -11.08%
• YTD: 25.05%
• 6M: 25.05%
• 1Y: 21.95%
• 3Y*: 12.36%
• 5Y*: 11.04%
• 10Y*: 8.06%

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

MFSB vs. COMT - Yearly Performance Comparison

	2026 (YTD)	2025	2024
MFSB MFS Active Core Plus Bond ETF	0.84%	7.40%	-1.28%
COMT iShares GSCI Commodity Dynamic Roll Strategy ETF	25.05%	6.07%	2.24%

Correlation

The correlation between MFSB and COMT is -0.34, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.34
Correlation (All Time) Calculated using the full available price history since Dec 5, 2024	-0.27

Return for Risk

MFSB vs. COMT — Risk / Return Rank

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

MFSB

MFSB Risk / Return Rank: 41
MFSB Sharpe Ratio Rank: 43
MFSB Sortino Ratio Rank: 44
MFSB Omega Ratio Rank: 40
MFSB Calmar Ratio Rank: 40
MFSB Martin Ratio Rank: 39

COMT

COMT Risk / Return Rank: 31
COMT Sharpe Ratio Rank: 29
COMT Sortino Ratio Rank: 28
COMT Omega Ratio Rank: 29
COMT Calmar Ratio Rank: 31
COMT Martin Ratio Rank: 40

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. COMT - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Active Core Plus Bond ETF (MFSB) and iShares GSCI Commodity Dynamic Roll Strategy ETF (COMT). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	MFSB	COMT	Difference
Sharpe ratio: Return per unit of total volatility	1.46	1.03	+0.43
Sortino ratio: Return per unit of downside risk	2.16	1.49	+0.67
Omega ratio: Gain probability vs. loss probability	1.25	1.19	+0.06
Calmar ratio: Return relative to maximum drawdown	1.94	1.49	+0.44
Martin ratio: Return relative to average drawdown	5.86	6.26	-0.40

MFSB vs. COMT - Sharpe Ratio Comparison

The current MFSB Sharpe Ratio is 1.46, which is higher than the COMT Sharpe Ratio of 1.03. The chart below compares the historical Sharpe Ratios of MFSB and COMT, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MFSB vs. COMT - Drawdown Comparison

The maximum MFSB drawdown since its inception was -3.19%, smaller than the maximum COMT drawdown of -51.89%. Use the drawdown chart below to compare losses from any high point for MFSB and COMT.

Drawdown Indicators

	MFSB	COMT	Difference
Max Drawdown Largest peak-to-trough decline	-3.19%	-51.89%	+48.70%
Max Drawdown (1Y) Largest decline over 1 year	-2.71%	-14.78%	+12.07%
Max Drawdown (3Y) Largest decline over 3 years	—	-14.78%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-29.00%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-39.22%	—
Current Drawdown Current decline from peak	-0.98%	-14.78%	+13.80%
Average Drawdown Average peak-to-trough decline	-0.83%	-24.01%	+23.18%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.89%	4.16%	-3.27%

Volatility

MFSB vs. COMT - Volatility Comparison

The current volatility for MFS Active Core Plus Bond ETF (MFSB) is 1.11%, while iShares GSCI Commodity Dynamic Roll Strategy ETF (COMT) has a volatility of 5.01%. This indicates that MFSB experiences smaller price fluctuations and is considered to be less risky than COMT based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFSB	COMT	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.11%	5.01%	-3.90%
Volatility (6M) Calculated over the trailing 6-month period	2.78%	19.22%	-16.44%
Volatility (1Y) Calculated over the trailing 1-year period	3.59%	21.47%	-17.88%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.23%	21.12%	-16.89%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.23%	18.89%	-14.66%

MFSB vs. COMT - Expense Ratio Comparison

MFSB has a 0.34% expense ratio, which is lower than COMT's 0.48% expense ratio.

Dividends

MFSB vs. COMT - Dividend Comparison

MFSB's dividend yield for the trailing twelve months is around 4.57%, less than COMT's 6.19% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COMT iShares GSCI Commodity Dynamic Roll Strategy ETF	6.19%	7.74%	4.90%	5.19%	29.79%	17.79%	0.36%	2.61%	11.65%	5.16%	0.52%	1.44%
MFSB MFS Active Core Plus Bond ETF	4.57%	4.58%	0.37%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MFSB and COMT in my portfolio?

MFSB and COMT have a correlation of -0.34, 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 COMT?

COMT has higher volatility (5.01%) compared to MFSB (1.11%). In terms of maximum drawdown, MFSB dropped -3.19% vs COMT's -51.89%.

Which ETF is better, MFSB or COMT?

On 1-year performance, COMT leads with 21.95% vs 5.22% for MFSB. On fees, MFSB is cheaper at 0.34% per year. On volatility, MFSB has been the lower-risk option at 1.11%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MFSB or COMT?

Over the 1-year period, COMT has performed better with a 21.95% return vs 5.22%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MFSB or COMT?

MFSB is cheaper with a 0.34% expense ratio, compared with 0.48% for COMT.

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

COMT has the higher dividend yield at 6.19%, compared with 4.57% for MFSB.

What is the main difference between MFSB and COMT?

MFSB is categorized as Intermediate Core-Plus Bond, while COMT is Commodities. They also come from different issuers: MFS and iShares. Their fees differ too: 0.34% for MFSB and 0.48% for COMT.

Which has better risk-adjusted returns?

MFSB currently has the higher Sharpe Ratio (1.46 vs 1.03), 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.