MBBA vs. BESF

Last updated Jun 25, 2026

MBBA (iShares Mortgage-Backed Securities Active ETF) and BESF (Bastion Energy ETF) are both exchange-traded funds - MBBA is a Mortgage Backed Securities fund actively managed by iShares, while BESF is a Energy Equities fund actively managed by Bastion. Both are actively managed. At a correlation of -0.43, they often move in opposite directions. MBBA charges 0.25%/yr vs 0.80%/yr for BESF.

Performance

MBBA vs. BESF - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Mortgage-Backed Securities Active ETF (MBBA) and Bastion Energy ETF (BESF). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

MBBA

• 1D: 0.38%
• 1M: 1.26%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

BESF

• 1D: -1.87%
• 1M: -8.03%
• YTD: 13.94%
• 6M: 13.42%
• 1Y: 55.80%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MBBA vs. BESF - Yearly Performance Comparison

	2026 (YTD)
MBBA iShares Mortgage-Backed Securities Active ETF	1.27%
BESF Bastion Energy ETF	6.99%

Correlation

The correlation between MBBA and BESF is -0.43, 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 Jan 26, 2026	-0.43

Return for Risk

MBBA vs. BESF — Risk / Return Rank

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

MBBA

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

BESF

BESF Risk / Return Rank: 81
BESF Sharpe Ratio Rank: 82
BESF Sortino Ratio Rank: 80
BESF Omega Ratio Rank: 73
BESF Calmar Ratio Rank: 91
BESF Martin Ratio Rank: 81

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.

MBBA vs. BESF - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Mortgage-Backed Securities Active ETF (MBBA) 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.

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.

	MBBA	BESF	Difference
Sharpe ratio: Return per unit of total volatility	—	2.28	—
Sortino ratio: Return per unit of downside risk	—	3.08	—
Omega ratio: Gain probability vs. loss probability	—	1.37	—
Calmar ratio: Return relative to maximum drawdown	—	5.11	—
Martin ratio: Return relative to average drawdown	—	13.92	—

Drawdowns

MBBA vs. BESF - Drawdown Comparison

The maximum MBBA drawdown since its inception was -2.83%, smaller than the maximum BESF drawdown of -10.97%. Use the drawdown chart below to compare losses from any high point for MBBA and BESF.

Drawdown Indicators

	MBBA	BESF	Difference
Max Drawdown Largest peak-to-trough decline	-2.83%	-10.97%	+8.14%
Max Drawdown (1Y) Largest decline over 1 year	—	-10.97%	—
Current Drawdown Current decline from peak	-0.72%	-10.44%	+9.72%
Average Drawdown Average peak-to-trough decline	-1.12%	-2.77%	+1.65%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	4.02%	—

Volatility

Volatility by Period

	MBBA	BESF	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	7.11%	—
Volatility (6M) Calculated over the trailing 6-month period	—	15.05%	—
Volatility (1Y) Calculated over the trailing 1-year period	4.55%	24.70%	-20.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.55%	24.43%	-19.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.55%	24.43%	-19.88%

MBBA vs. BESF - Expense Ratio Comparison

MBBA has a 0.25% expense ratio, which is lower than BESF's 0.80% expense ratio.

Dividends

MBBA vs. BESF - Dividend Comparison

MBBA's dividend yield for the trailing twelve months is around 1.83%, less than BESF's 5.97% yield.

Position	TTM	2025
BESF Bastion Energy ETF	5.97%	6.39%
MBBA iShares Mortgage-Backed Securities Active ETF	1.83%	0.00%

Frequently Asked Questions

Can I hold both MBBA and BESF in my portfolio?

MBBA and BESF have a correlation of -0.43, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, MBBA or BESF?

On fees, MBBA is cheaper at 0.25% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, MBBA or BESF?

MBBA is cheaper with a 0.25% expense ratio, compared with 0.80% for BESF.

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

BESF has the higher dividend yield at 5.97%, compared with 1.83% for MBBA.

What is the main difference between MBBA and BESF?

MBBA is categorized as Mortgage Backed Securities, while BESF is Energy Equities. They also come from different issuers: iShares and Bastion. Their fees differ too: 0.25% for MBBA and 0.80% for BESF.