MBBA vs. VMBS
MBBA (iShares Mortgage-Backed Securities Active ETF) and VMBS (Vanguard Mortgage-Backed Securities ETF) are both Mortgage Backed Securities funds. MBBA is actively managed, while VMBS is passively managed. Their correlation of 0.86 suggests significant overlap in exposure. MBBA charges 0.25%/yr vs 0.04%/yr for VMBS.
Performance
MBBA vs. VMBS - Performance Comparison
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Returns By Period
MBBA
- 1D
- 0.38%
- 1M
- 1.26%
- YTD
- —
- 6M
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
VMBS
- 1D
- 0.47%
- 1M
- 1.10%
- YTD
- 1.39%
- 6M
- 1.26%
- 1Y
- 6.10%
- 3Y*
- 4.68%
- 5Y*
- 0.68%
- 10Y*
- 1.40%
MBBA vs. VMBS - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
MBBA iShares Mortgage-Backed Securities Active ETF | 1.27% |
VMBS Vanguard Mortgage-Backed Securities ETF | 1.18% |
Correlation
The correlation between MBBA and VMBS is 0.86, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Jan 26, 2026 | 0.86 |
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Return for Risk
MBBA vs. VMBS — Risk / Return Rank
MBBA
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
VMBS
MBBA vs. VMBS - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Mortgage-Backed Securities Active ETF (MBBA) and Vanguard Mortgage-Backed Securities ETF (VMBS). 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 | VMBS | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.26 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 2.28 | — |
| Martin ratioReturn relative to average drawdown | — | 7.24 | — |
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Drawdowns
MBBA vs. VMBS - Drawdown Comparison
The maximum MBBA drawdown since its inception was -2.83%, smaller than the maximum VMBS drawdown of -17.47%. Use the drawdown chart below to compare losses from any high point for MBBA and VMBS.
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Drawdown Indicators
| MBBA | VMBS | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -2.83% | -17.47% | +14.64% |
Max Drawdown (1Y)Largest decline over 1 year | — | -2.68% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -7.65% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -17.12% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -17.47% | — |
Current DrawdownCurrent decline from peak | -0.72% | -0.61% | -0.11% |
Average DrawdownAverage peak-to-trough decline | -1.12% | -2.49% | +1.37% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 0.85% | — |
Volatility
MBBA vs. VMBS - Volatility Comparison
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Volatility by Period
| MBBA | VMBS | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 1.26% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 3.30% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 4.55% | 4.32% | +0.23% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.55% | 6.79% | -2.24% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.55% | 5.41% | -0.86% |
MBBA vs. VMBS - Expense Ratio Comparison
MBBA has a 0.25% expense ratio, which is higher than VMBS's 0.04% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
MBBA vs. VMBS - Dividend Comparison
MBBA's dividend yield for the trailing twelve months is around 1.83%, less than VMBS's 4.15% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MBBA iShares Mortgage-Backed Securities Active ETF | 1.83% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
VMBS Vanguard Mortgage-Backed Securities ETF | 4.15% | 4.20% | 3.94% | 3.31% | 2.35% | 1.02% | 2.01% | 2.77% | 2.72% | 2.16% | 2.10% | 2.12% |
Frequently Asked Questions
MBBA and VMBS have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, VMBS is cheaper at 0.04% per year. The better choice depends on whether you care most about return, fees, risk, or income.
VMBS is cheaper with a 0.04% expense ratio, compared with 0.25% for MBBA.
VMBS has the higher dividend yield at 4.15%, compared with 1.83% for MBBA.
They also come from different issuers: iShares and Vanguard. Their fees differ too: 0.25% for MBBA and 0.04% for VMBS.
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