SPAB vs. JMBS
SPAB (SPDR Portfolio Aggregate Bond ETF) and JMBS (Janus Henderson Mortgage-Backed Securities ETF) are both exchange-traded funds - SPAB is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Bond Index, while JMBS is a Mortgage Backed Securities fund actively managed by Janus Henderson. SPAB is passively managed, while JMBS is actively managed. Over the past 5 years, SPAB returned 0.07%/yr vs 0.74%/yr for JMBS. Their correlation of 0.80 suggests significant overlap in exposure. SPAB charges 0.03%/yr vs 0.32%/yr for JMBS.
Performance
SPAB vs. JMBS - Performance Comparison
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Returns By Period
In the year-to-date period, SPAB achieves a 0.29% return, which is significantly lower than JMBS's 0.51% return.
SPAB
- 1D
- -0.12%
- 1M
- 0.31%
- YTD
- 0.29%
- 6M
- 0.14%
- 1Y
- 5.24%
- 3Y*
- 3.93%
- 5Y*
- 0.07%
- 10Y*
- 1.54%
JMBS
- 1D
- -0.29%
- 1M
- 0.29%
- YTD
- 0.51%
- 6M
- 0.73%
- 1Y
- 7.18%
- 3Y*
- 4.66%
- 5Y*
- 0.74%
- 10Y*
- —
SPAB vs. JMBS - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
SPAB SPDR Portfolio Aggregate Bond ETF | 0.29% | 7.25% | 1.25% | 5.56% | -13.04% | -1.77% | 7.39% | 8.67% | 1.33% |
JMBS Janus Henderson Mortgage-Backed Securities ETF | 0.51% | 8.82% | 1.53% | 5.66% | -11.40% | -0.32% | 5.80% | 7.11% | 1.53% |
Correlation
The correlation between SPAB and JMBS is 0.93, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.93 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.94 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.92 |
Correlation (All Time) Calculated using the full available price history since Sep 14, 2018 | 0.80 |
The correlation between SPAB and JMBS shifts across timeframes, from 0.80 (all time) to 0.94 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
SPAB vs. JMBS — Risk / Return Rank
SPAB
JMBS
SPAB vs. JMBS - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for SPDR Portfolio Aggregate Bond ETF (SPAB) and Janus Henderson Mortgage-Backed Securities ETF (JMBS). 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.
| SPAB | JMBS | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.28 | ||
| Sortino ratioReturn per unit of downside risk | -0.38 | ||
| Omega ratioGain probability vs. loss probability | 1.25 | 1.31 | -0.06 |
| Calmar ratioReturn relative to maximum drawdown | 1.92 | 2.36 | -0.44 |
| Martin ratioReturn relative to average drawdown | 5.72 | 7.80 | -2.07 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| SPAB | JMBS | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.40 | 1.67 | -0.28 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.01 | 0.11 | -0.10 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.28 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.50 | 0.42 | +0.09 |
Drawdowns
SPAB vs. JMBS - Drawdown Comparison
The maximum SPAB drawdown since its inception was -18.56%, which is greater than JMBS's maximum drawdown of -16.68%. Use the drawdown chart below to compare losses from any high point for SPAB and JMBS.
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Drawdown Indicators
| SPAB | JMBS | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.56% | -16.68% | -1.88% |
Max Drawdown (1Y)Largest decline over 1 year | -2.74% | -3.05% | +0.31% |
Max Drawdown (3Y)Largest decline over 3 years | -6.08% | -7.76% | +1.68% |
Max Drawdown (5Y)Largest decline over 5 years | -17.96% | -16.68% | -1.28% |
Max Drawdown (10Y)Largest decline over 10 years | -18.56% | — | — |
Current DrawdownCurrent decline from peak | -2.27% | -1.66% | -0.61% |
Average DrawdownAverage peak-to-trough decline | -3.08% | -3.90% | +0.82% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.92% | 0.92% | 0.00% |
Volatility
SPAB vs. JMBS - Volatility Comparison
The current volatility for SPDR Portfolio Aggregate Bond ETF (SPAB) is 1.15%, while Janus Henderson Mortgage-Backed Securities ETF (JMBS) has a volatility of 1.65%. This indicates that SPAB experiences smaller price fluctuations and is considered to be less risky than JMBS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SPAB | JMBS | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.15% | 1.65% | -0.50% |
Volatility (6M)Calculated over the trailing 6-month period | 2.57% | 3.23% | -0.66% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.77% | 4.31% | -0.54% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.92% | 6.49% | -0.57% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.54% | 5.52% | +0.02% |
SPAB vs. JMBS - Expense Ratio Comparison
SPAB has a 0.03% expense ratio, which is lower than JMBS's 0.32% expense ratio.
Dividends
SPAB vs. JMBS - Dividend Comparison
SPAB's dividend yield for the trailing twelve months is around 4.05%, less than JMBS's 5.19% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
JMBS Janus Henderson Mortgage-Backed Securities ETF | 5.19% | 5.03% | 5.53% | 4.38% | 2.73% | 1.16% | 2.92% | 3.63% | 0.89% | 0.00% | 0.00% | 0.00% |
SPAB SPDR Portfolio Aggregate Bond ETF | 4.05% | 3.97% | 3.86% | 3.34% | 2.59% | 2.11% | 2.43% | 2.92% | 2.96% | 2.67% | 2.63% | 2.59% |
Frequently Asked Questions
With a correlation of 0.93, SPAB and JMBS move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
JMBS has higher volatility (1.65%) compared to SPAB (1.15%). In terms of maximum drawdown, SPAB dropped -18.56% vs JMBS's -16.68%.
On 5-year performance, JMBS leads with 0.74% vs 0.07% for SPAB. On fees, SPAB is cheaper at 0.03% per year. On volatility, SPAB has been the lower-risk option at 1.15%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, JMBS has performed better with a 0.74% return vs 0.07%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
SPAB is cheaper with a 0.03% expense ratio, compared with 0.32% for JMBS.
JMBS has the higher dividend yield at 5.19%, compared with 4.05% for SPAB.
SPAB is categorized as Total Bond Market, while JMBS is Mortgage Backed Securities. They also come from different issuers: State Street and Janus Henderson. Their fees differ too: 0.03% for SPAB and 0.32% for JMBS.
JMBS currently has the higher Sharpe Ratio (1.67 vs 1.40), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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