Data as of Oct 28, 2026.
BOND vs MBB: Differences, Returns & Fees
Over the year to Oct 28, 2026, BOND returned −1.4% to MBB's −0.8%, and MBB charges 0.04% to BOND's 0.54%.
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Net assets: $8.3bn on Jun 30, 2026 for PIMCO Active Bond Exchange-Traded Fund, and $35.5bn on Oct 28, 2026 for iShares MBS ETF.
Pair scorecard
MBB costs 0.50 points a year less; their one-year returns differ by 0.6 points.
| Measure | BOND | MBB |
|---|---|---|
| Return | ||
| Total return, 1 year | −1.4% | −0.8% |
| Drawdown | ||
| Below its high | 3.1%, high on Feb 27, 2026 | |
| Benchmark | ||
| What it tracks | No index, actively managed | Bloomberg U.S. MBS Index |
| Cost and size | ||
| Expense ratio | 0.54% | 0.04% |
| Net assets, BOND as of Jun 30, 2026 and MBB as of Oct 28, 2026 | $8.3bn | $35.5bn |
| Holdings | ||
| Holdings in common | 1% | |
Holdings in common uses holdings dated Jun 30, 2026 and Aug 31, 2026. Method
Risk and return
Mar 9, 2012 to Oct 23, 2026 · 763 weekly returnsEach against its own benchmark: BOND against AGG, Mar 9, 2012 to Oct 23, 2026; MBB against SPMB, Feb 6, 2009 to Oct 23, 2026.
BOND returned more: +47.4% to +23.0%. MBB swung less: 4.3% to 4.9%. MBB fell less at its worst: −17.4% to −19.5%.
Full scorecard
19 measures, with how each is measured Open ↓
| Measure | BOND | MBB | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +47.4% | +23.0% | BOND | Price change plus distributions, reinvested. |
| Annualized | +2.7% | +1.4% | BOND | Total return as a yearly rate. |
| Price return | −12.6% | −15.5% | BOND | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 4.9% | 4.3% | MBB | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 3.6% | 3.1% | MBB | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −19.5% | −17.4% | MBB | Deepest fall from a high to the low after it. |
| Upside capture | 102.2% | 77.8% | Share of its benchmark's rise caught in the weeks it rose. | |
| Downside capture | 95.5% | 78.4% | Share of its benchmark's fall taken in the weeks it fell. Lower is better. | |
| Beta | 0.97 | 0.76 | Not an edge | How far it moves for each 1% its benchmark moves. |
| R squared | 0.88 | 0.76 | Not an edge | Share of its weekly moves its benchmark explains. |
| Risk-adjusted | ||||
| Sharpe | 0.21 | −0.06 | BOND | Return above Treasury bills per unit of volatility. |
| Sortino | 0.28 | −0.08 | BOND | Return above Treasury bills per unit of downside deviation. |
| Treynor | 0.010 | 0.009 | Return above Treasury bills per unit of beta. | |
| Calmar | 0.14 | 0.08 | BOND | Annualized return divided by the max drawdown. |
| Against the benchmark | ||||
| Benchmark | AGG | SPMB | The ETF each fund is measured against. | |
| Alpha | +0.9% a year | +0.1% a year | MBB not significant | Yearly return beyond what its beta to the benchmark predicts. |
| Alpha t-stat | 2.05 | 0.26 | Not an edge | How sure the alpha is. Below 2, it could be chance. |
| Alpha range | 0.0% to +1.7% | −0.8% to +1.1% | MBB includes zero | The 95% range for the yearly alpha. |
| Information ratio | 0.53 | −0.03 | Return against its benchmark per unit of tracking error. | |
| Tracking error | 1.7% | 2.3% | Not an edge | How far weekly returns stray from the benchmark, annualized. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 763 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, BOND and MBB hold 1% of their money in the same securities at the same weight. Holdings dated Jun 30, 2026 and Aug 31, 2026.
half
1% in common
Only in one fund ↓
Side by side
BOND and MBB on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
BOND and MBB do different jobs. What does each one do in a portfolio?
- What each follows. BOND follows No index, actively managed and MBB follows Bloomberg U.S. MBS Index.
- Holdings in common. 1% of the weight is in the same securities (holdings dated Jun 30, 2026 and Aug 31, 2026).
- Number of holdings. BOND holds 1,565 positions and MBB holds 10813.
Data as of Oct 28, 2026.
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BOND
BOND is actively managed and tracks no index. Over the year to Oct 28, 2026 it returned −1.4% with distributions reinvested, against −1.4% for its benchmark, the Bloomberg U.S. Aggregate Index. The prospectus expense ratio is 0.54% a year. It sat 3.1% below its high of Feb 27, 2026 on Oct 28, 2026.
MBB
MBB tracks an index of mortgage-backed securities. Over the year to Oct 28, 2026 it returned −0.8% with distributions reinvested, against −1.1% for its benchmark, the Bloomberg U.S. MBS Index. The prospectus expense ratio is 0.04% a year.
Questions people ask
- Which returned more over the last year, BOND or MBB?
- In the year to Oct 28, 2026, with distributions reinvested, BOND returned −1.4% and MBB −0.8%.
- Which is cheaper, BOND or MBB?
- MBB is cheaper, by 0.50 percentage points a year. That is about $50 on $10,000 held for a year. Fees come from each fund's prospectus.
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How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, BOND against MBB, data as of Oct 28, 2026. https://etfiq.com/compare/any/bond-vs-mbb
ETFIQ. (Oct 28, 2026). BOND against MBB. Retrieved from https://etfiq.com/compare/any/bond-vs-mbb
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