MFSB vs. BESF

Last updated Jun 4, 2026

MFSB (MFS Active Core Plus Bond ETF) and BESF (Bastion Energy ETF) are both exchange-traded funds - MFSB is a Intermediate Core-Plus Bond fund actively managed by MFS, while BESF is a Energy Equities fund actively managed by Bastion. Both are actively managed. At a correlation of -0.17, they often move in opposite directions. MFSB charges 0.34%/yr vs 0.80%/yr for BESF.

Performance

MFSB vs. BESF - Performance Comparison

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

Returns By Period

In the year-to-date period, MFSB achieves a 0.56% return, which is significantly lower than BESF's 19.74% return.

MFSB

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

BESF

• 1D: 0.68%
• 1M: -4.08%
• YTD: 19.74%
• 6M: 21.51%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MFSB vs. BESF - Yearly Performance Comparison

	2026 (YTD)	2025
MFSB MFS Active Core Plus Bond ETF	0.56%	4.92%
BESF Bastion Energy ETF	19.74%	41.15%

Correlation

The correlation between MFSB and BESF is -0.17, 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 (All Time) Calculated using the full available price history since Jun 5, 2025	-0.17

Return for Risk

MFSB vs. BESF — 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

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. BESF - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Active Core Plus Bond ETF (MFSB) and Bastion Energy ETF (BESF). 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	BESF	Difference
Sharpe ratio: Return per unit of total volatility	1.70	—	—
Sortino ratio: Return per unit of downside risk	2.51	—	—
Omega ratio: Gain probability vs. loss probability	1.30	—	—
Calmar ratio: Return relative to maximum drawdown	2.28	—	—
Martin ratio: Return relative to average drawdown	7.17	—	—
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

	MFSB	BESF	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.70	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.01	2.87	-1.86

Drawdowns

MFSB vs. BESF - Drawdown Comparison

The maximum MFSB drawdown since its inception was -3.19%, smaller than the maximum BESF drawdown of -9.89%. Use the drawdown chart below to compare losses from any high point for MFSB and BESF.

Drawdown Indicators

	MFSB	BESF	Difference
Max Drawdown Largest peak-to-trough decline	-3.19%	-9.89%	+6.70%
Max Drawdown (1Y) Largest decline over 1 year	-2.71%	—	—
Current Drawdown Current decline from peak	-1.26%	-5.88%	+4.62%
Average Drawdown Average peak-to-trough decline	-0.82%	-2.45%	+1.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.86%	—	—

Volatility

Volatility by Period

	MFSB	BESF	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.33%	—	—
Volatility (6M) Calculated over the trailing 6-month period	2.68%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	3.64%	24.33%	-20.69%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.23%	24.33%	-20.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.23%	24.33%	-20.10%

MFSB vs. BESF - Expense Ratio Comparison

MFSB has a 0.34% expense ratio, which is lower than BESF's 0.80% expense ratio.

Dividends

MFSB vs. BESF - Dividend Comparison

MFSB's dividend yield for the trailing twelve months is around 4.59%, less than BESF's 5.68% yield.

Position	TTM	2025	2024
BESF Bastion Energy ETF	5.68%	6.39%	0.00%
MFSB MFS Active Core Plus Bond ETF	4.59%	4.58%	0.37%

Frequently Asked Questions

Can I hold both MFSB and BESF in my portfolio?

MFSB and BESF have a correlation of -0.17, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, MFSB or BESF?

On fees, MFSB is cheaper at 0.34% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, MFSB or BESF?

MFSB is cheaper with a 0.34% expense ratio, compared with 0.80% for BESF.

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

BESF has the higher dividend yield at 5.68%, compared with 4.59% for MFSB.

What is the main difference between MFSB and BESF?

MFSB is categorized as Intermediate Core-Plus Bond, while BESF is Energy Equities. They also come from different issuers: MFS and Bastion. Their fees differ too: 0.34% for MFSB and 0.80% for BESF.