SECU vs. MBB
SECU (iShares Securitized Income Active ETF) and MBB (iShares MBS Bond ETF) are both Mortgage Backed Securities funds from iShares. SECU is actively managed, while MBB is passively managed. At a 0.42 correlation, their price movements are largely independent. SECU charges 0.40%/yr vs 0.06%/yr for MBB.
Performance
SECU vs. MBB - Performance Comparison
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Returns By Period
SECU
- 1D
- 0.22%
- 1M
- 0.83%
- YTD
- —
- 6M
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
MBB
- 1D
- 0.43%
- 1M
- 1.07%
- YTD
- 1.26%
- 6M
- 1.05%
- 1Y
- 5.71%
- 3Y*
- 4.50%
- 5Y*
- 0.54%
- 10Y*
- 1.34%
SECU vs. MBB - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
SECU iShares Securitized Income Active ETF | 1.73% |
MBB iShares MBS Bond ETF | 0.91% |
Correlation
The correlation between SECU and MBB is 0.42, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Jan 26, 2026 | 0.42 |
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Return for Risk
SECU vs. MBB — Risk / Return Rank
SECU
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
MBB
SECU vs. MBB - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Securitized Income Active ETF (SECU) and iShares MBS Bond ETF (MBB). 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.
| SECU | MBB | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.23 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 1.95 | — |
| Martin ratioReturn relative to average drawdown | — | 6.07 | — |
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Drawdowns
SECU vs. MBB - Drawdown Comparison
The maximum SECU drawdown since its inception was -1.76%, smaller than the maximum MBB drawdown of -17.64%. Use the drawdown chart below to compare losses from any high point for SECU and MBB.
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Drawdown Indicators
| SECU | MBB | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -1.76% | -17.64% | +15.88% |
Max Drawdown (1Y)Largest decline over 1 year | — | -2.94% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -7.68% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -17.19% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -17.64% | — |
Current DrawdownCurrent decline from peak | -0.18% | -0.85% | +0.67% |
Average DrawdownAverage peak-to-trough decline | -0.51% | -2.34% | +1.83% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 0.94% | — |
Volatility
SECU vs. MBB - Volatility Comparison
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Volatility by Period
| SECU | MBB | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 1.32% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 3.34% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 3.30% | 4.47% | -1.17% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.30% | 6.83% | -3.53% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.30% | 5.32% | -2.02% |
SECU vs. MBB - Expense Ratio Comparison
SECU has a 0.40% expense ratio, which is higher than MBB's 0.06% expense ratio.
Dividends
SECU vs. MBB - Dividend Comparison
SECU's dividend yield for the trailing twelve months is around 2.09%, less than MBB's 4.25% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MBB iShares MBS Bond ETF | 4.25% | 4.21% | 3.94% | 3.40% | 2.31% | 1.05% | 2.10% | 2.77% | 2.64% | 2.23% | 2.58% | 2.66% |
SECU iShares Securitized Income Active ETF | 2.09% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
SECU and MBB have a correlation of 0.42, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, MBB is cheaper at 0.06% per year. The better choice depends on whether you care most about return, fees, risk, or income.
MBB is cheaper with a 0.06% expense ratio, compared with 0.40% for SECU.
MBB has the higher dividend yield at 4.25%, compared with 2.09% for SECU.
Their fees differ too: 0.40% for SECU and 0.06% for MBB.
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