MBB vs. JPST
MBB (iShares MBS Bond ETF) and JPST (JPMorgan Ultra-Short Income ETF) are both exchange-traded funds - MBB is a Mortgage Backed Securities fund tracking the Barclays Capital U.S. MBS Index, while JPST is a Ultrashort Bond fund actively managed by JPMorgan. MBB is passively managed, while JPST is actively managed. Over the past 5 years, MBB returned 0.34%/yr vs 3.61%/yr for JPST. At a 0.41 correlation, their price movements are largely independent. MBB charges 0.06%/yr vs 0.18%/yr for JPST.
Performance
MBB vs. JPST - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, MBB achieves a 0.58% return, which is significantly lower than JPST's 1.40% return.
MBB
- 1D
- -0.23%
- 1M
- 0.31%
- YTD
- 0.58%
- 6M
- 0.71%
- 1Y
- 6.76%
- 3Y*
- 4.36%
- 5Y*
- 0.34%
- 10Y*
- 1.30%
JPST
- 1D
- 0.00%
- 1M
- 0.35%
- YTD
- 1.40%
- 6M
- 1.74%
- 1Y
- 4.31%
- 3Y*
- 5.16%
- 5Y*
- 3.61%
- 10Y*
- —
MBB vs. JPST - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MBB iShares MBS Bond ETF | 0.58% | 8.38% | 1.31% | 5.01% | -11.74% | -1.43% | 4.08% | 6.18% | 0.82% | 0.83% |
JPST JPMorgan Ultra-Short Income ETF | 1.40% | 4.99% | 5.58% | 5.13% | 1.14% | 0.11% | 2.18% | 3.34% | 2.23% | 1.00% |
Correlation
The correlation between MBB and JPST is 0.57, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.57 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.59 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.52 |
Correlation (All Time) Calculated using the full available price history since May 22, 2017 | 0.41 |
The correlation between MBB and JPST shifts across timeframes, from 0.41 (all time) to 0.59 (3 years), reflecting how their relationship changes across market environments.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
MBB vs. JPST — Risk / Return Rank
MBB
JPST
MBB vs. JPST - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares MBS Bond ETF (MBB) and JPMorgan Ultra-Short Income ETF (JPST). 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.
| MBB | JPST | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -6.59 | ||
| Sortino ratioReturn per unit of downside risk | -15.39 | ||
| Omega ratioGain probability vs. loss probability | 1.27 | 3.94 | -2.67 |
| Calmar ratioReturn relative to maximum drawdown | 2.31 | 29.16 | -26.86 |
| Martin ratioReturn relative to average drawdown | 7.64 | 144.13 | -136.49 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Loading charts...
Sharpe Ratios by Period
| MBB | JPST | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.51 | 8.09 | -6.59 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.05 | 6.32 | -6.27 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.25 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.58 | 3.20 | -2.62 |
Drawdowns
MBB vs. JPST - Drawdown Comparison
The maximum MBB drawdown since its inception was -17.64%, which is greater than JPST's maximum drawdown of -3.28%. Use the drawdown chart below to compare losses from any high point for MBB and JPST.
Loading charts...
Drawdown Indicators
| MBB | JPST | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.64% | -3.28% | -14.36% |
Max Drawdown (1Y)Largest decline over 1 year | -2.94% | -0.15% | -2.79% |
Max Drawdown (3Y)Largest decline over 3 years | -7.68% | -0.30% | -7.38% |
Max Drawdown (5Y)Largest decline over 5 years | -17.19% | -0.79% | -16.40% |
Max Drawdown (10Y)Largest decline over 10 years | -17.64% | — | — |
Current DrawdownCurrent decline from peak | -1.52% | -0.02% | -1.50% |
Average DrawdownAverage peak-to-trough decline | -2.35% | -0.08% | -2.27% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.89% | 0.03% | +0.86% |
Volatility
MBB vs. JPST - Volatility Comparison
iShares MBS Bond ETF (MBB) has a higher volatility of 1.59% compared to JPMorgan Ultra-Short Income ETF (JPST) at 0.15%. This indicates that MBB's price experiences larger fluctuations and is considered to be riskier than JPST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| MBB | JPST | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.59% | 0.15% | +1.44% |
Volatility (6M)Calculated over the trailing 6-month period | 3.23% | 0.36% | +2.87% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.51% | 0.54% | +3.97% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.81% | 0.58% | +6.23% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.31% | 0.93% | +4.38% |
MBB vs. JPST - Expense Ratio Comparison
MBB has a 0.06% expense ratio, which is lower than JPST's 0.18% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
MBB vs. JPST - Dividend Comparison
MBB's dividend yield for the trailing twelve months is around 4.28%, which matches JPST's 4.26% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
JPST JPMorgan Ultra-Short Income ETF | 4.26% | 4.43% | 5.16% | 4.79% | 1.83% | 0.73% | 1.43% | 2.69% | 2.07% | 0.96% | 0.00% | 0.00% |
MBB iShares MBS Bond ETF | 4.28% | 4.21% | 3.94% | 3.40% | 2.31% | 1.05% | 2.10% | 2.77% | 2.64% | 2.23% | 2.58% | 2.66% |
Frequently Asked Questions
MBB and JPST have a correlation of 0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MBB has higher volatility (1.59%) compared to JPST (0.15%). In terms of maximum drawdown, MBB dropped -17.64% vs JPST's -3.28%.
On 5-year performance, JPST leads with 3.61% vs 0.34% for MBB. On fees, MBB is cheaper at 0.06% per year. On volatility, JPST has been the lower-risk option at 0.15%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, JPST has performed better with a 3.61% return vs 0.34%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
MBB is cheaper with a 0.06% expense ratio, compared with 0.18% for JPST.
MBB has the higher dividend yield at 4.28%, compared with 4.26% for JPST.
MBB is categorized as Mortgage Backed Securities, while JPST is Ultrashort Bond. They also come from different issuers: iShares and JPMorgan. Their fees differ too: 0.06% for MBB and 0.18% for JPST.
JPST currently has the higher Sharpe Ratio (8.09 vs 1.51), 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.
Find the right allocation for MBB and JPST
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer