MBBA vs. PMBS
MBBA (iShares Mortgage-Backed Securities Active ETF) and PMBS (PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund) are both Mortgage Backed Securities funds. Both are actively managed. Their correlation of 0.90 suggests significant overlap in exposure. MBBA charges 0.25%/yr vs 0.71%/yr for PMBS.
Performance
MBBA vs. PMBS - Performance Comparison
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Returns By Period
MBBA
- 1D
- -0.16%
- 1M
- 0.53%
- YTD
- —
- 6M
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
PMBS
- 1D
- -0.21%
- 1M
- 0.11%
- YTD
- 0.90%
- 6M
- 1.15%
- 1Y
- 7.55%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
MBBA vs. PMBS - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
MBBA iShares Mortgage-Backed Securities Active ETF | 0.64% |
PMBS PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund | 0.03% |
Correlation
The correlation between MBBA and PMBS is 0.90, 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 27, 2026 | 0.90 |
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Return for Risk
MBBA vs. PMBS — Risk / Return Rank
MBBA
PMBS
MBBA vs. PMBS - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Mortgage-Backed Securities Active ETF (MBBA) and PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund (PMBS). 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.
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Sharpe Ratios by Period
| MBBA | PMBS | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | — | 1.80 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.40 | 0.83 | -0.43 |
Drawdowns
MBBA vs. PMBS - Drawdown Comparison
The maximum MBBA drawdown since its inception was -2.83%, smaller than the maximum PMBS drawdown of -4.35%. Use the drawdown chart below to compare losses from any high point for MBBA and PMBS.
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Drawdown Indicators
| MBBA | PMBS | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -2.83% | -4.35% | +1.52% |
Max Drawdown (1Y)Largest decline over 1 year | — | -2.97% | — |
Current DrawdownCurrent decline from peak | -1.17% | -1.55% | +0.38% |
Average DrawdownAverage peak-to-trough decline | -1.12% | -1.14% | +0.02% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 0.87% | — |
Volatility
MBBA vs. PMBS - Volatility Comparison
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Volatility by Period
| MBBA | PMBS | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 1.52% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 3.10% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 4.66% | 4.22% | +0.44% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.66% | 4.88% | -0.22% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.66% | 4.88% | -0.22% |
MBBA vs. PMBS - Expense Ratio Comparison
MBBA has a 0.25% expense ratio, which is lower than PMBS's 0.71% expense ratio.
Dividends
MBBA vs. PMBS - Dividend Comparison
MBBA's dividend yield for the trailing twelve months is around 1.84%, less than PMBS's 4.98% yield.
| Position | TTM | 2025 | 2024 |
|---|---|---|---|
MBBA iShares Mortgage-Backed Securities Active ETF | 1.84% | 0.00% | 0.00% |
PMBS PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund | 4.98% | 4.73% | 1.59% |
Frequently Asked Questions
MBBA and PMBS have a correlation of 0.90, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
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.
MBBA is cheaper with a 0.25% expense ratio, compared with 0.71% for PMBS.
PMBS has the higher dividend yield at 4.98%, compared with 1.84% for MBBA.
They also come from different issuers: iShares and PIMCO. Their fees differ too: 0.25% for MBBA and 0.71% for PMBS.
Find the right allocation for MBBA and PMBS
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