MBBA vs. MBSX

Last updated Jun 4, 2026

MBBA (iShares Mortgage-Backed Securities Active ETF) and MBSX (Regan Fixed Rate MBS ETF) are both Mortgage Backed Securities funds. Both are actively managed. At a 0.07 correlation, their price movements are largely independent. MBBA charges 0.25%/yr vs 0.40%/yr for MBSX.

Performance

MBBA vs. MBSX - Performance Comparison

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

Returns By Period

MBBA

• 1D: -0.16%
• 1M: 0.53%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

MBSX

• 1D: 9.68%
• 1M: 3.16%
• YTD: 6.22%
• 6M: 6.79%
• 1Y: 13.81%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MBBA vs. MBSX - Yearly Performance Comparison

	2026 (YTD)
MBBA iShares Mortgage-Backed Securities Active ETF	0.64%
MBSX Regan Fixed Rate MBS ETF	5.81%

Correlation

The correlation between MBBA and MBSX is 0.07, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (All Time) Calculated using the full available price history since Jan 27, 2026	0.07

Return for Risk

MBBA vs. MBSX — Risk / Return Rank

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

MBSX

MBSX Risk / Return Rank: 17
MBSX Sharpe Ratio Rank: 13
MBSX Sortino Ratio Rank: 16
MBSX Omega Ratio Rank: 23
MBSX Calmar Ratio Rank: 16
MBSX Martin Ratio Rank: 19

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. MBSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Mortgage-Backed Securities Active ETF (MBBA) and Regan Fixed Rate MBS ETF (MBSX). 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.

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

Sharpe Ratios by Period

	MBBA	MBSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	0.26	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.40	0.25	+0.15

Drawdowns

MBBA vs. MBSX - Drawdown Comparison

The maximum MBBA drawdown since its inception was -2.83%, smaller than the maximum MBSX drawdown of -27.57%. Use the drawdown chart below to compare losses from any high point for MBBA and MBSX.

Drawdown Indicators

	MBBA	MBSX	Difference
Max Drawdown Largest peak-to-trough decline	-2.83%	-27.57%	+24.74%
Max Drawdown (1Y) Largest decline over 1 year	—	-27.57%	—
Current Drawdown Current decline from peak	-1.17%	-20.56%	+19.39%
Average Drawdown Average peak-to-trough decline	-1.12%	-6.02%	+4.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	6.64%	—

Volatility

Volatility by Period

	MBBA	MBSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	41.45%	—
Volatility (6M) Calculated over the trailing 6-month period	—	50.89%	—
Volatility (1Y) Calculated over the trailing 1-year period	4.66%	53.40%	-48.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.66%	54.70%	-50.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.66%	54.70%	-50.04%

MBBA vs. MBSX - Expense Ratio Comparison

MBBA has a 0.25% expense ratio, which is lower than MBSX's 0.40% expense ratio.

Dividends

MBBA vs. MBSX - Dividend Comparison

MBBA's dividend yield for the trailing twelve months is around 1.84%, less than MBSX's 3.36% yield.

Position	TTM	2025
MBBA iShares Mortgage-Backed Securities Active ETF	1.84%	0.00%
MBSX Regan Fixed Rate MBS ETF	3.36%	2.77%

Frequently Asked Questions

Can I hold both MBBA and MBSX in my portfolio?

MBBA and MBSX have a correlation of 0.07, 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 MBSX?

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 MBSX?

MBBA is cheaper with a 0.25% expense ratio, compared with 0.40% for MBSX.

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

MBSX has the higher dividend yield at 3.36%, compared with 1.84% for MBBA.

What is the main difference between MBBA and MBSX?

They also come from different issuers: iShares and Regan. Their fees differ too: 0.25% for MBBA and 0.40% for MBSX.