Data as of Oct 28, 2026.
IGIB vs MBB: Differences, Returns & Fees
On Aug 31, 2026 IGIB's duration was 5.9 years and MBB's 5.7; both charge 0.04%.
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Net assets on Oct 28, 2026: $19.5bn for iShares 5-10 Year Investment Grade Corporate Bond ETF and $35.5bn for iShares MBS ETF.
Pair scorecard
Both cost 0.04% a year; their one-year returns differ by 1.0 point; MBB is 1.8 times larger.
Points (pts) are percentage points.
| Measure | IGIB | MBB |
|---|---|---|
| Return | ||
| Total return, 1 year | −1.8% | −0.8% |
| Drawdown | ||
| Below its high | 3.2%, high on Feb 27, 2026 | |
| Benchmark | ||
| What it tracks | ICE BofA 5-10 Year US Corporate Index | Bloomberg U.S. MBS Index |
| Cost and size | ||
| Expense ratio | 0.04% | 0.04% |
| Net assets | $19.5bn | $35.5bn |
| Holdings | ||
| Holdings in common | 0% | |
Holdings in common uses holdings dated Aug 31, 2026. Method
Risk and return
Mar 23, 2007 to Oct 23, 2026 · 1,022 weekly returnsIGIB returned more: +100.8% to +63.4%. MBB swung less: 4.2% to 6.0%. MBB fell less at its worst: −17.4% to −20.0%.
Full scorecard
9 measures, with how each is measured Open ↓
| Measure | IGIB | MBB | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +100.8% | +63.4% | IGIB | Price change plus distributions, reinvested. |
| Annualized | +3.6% | +2.5% | IGIB | Total return as a yearly rate. |
| Price return | +0.9% | −9.6% | IGIB | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 6.0% | 4.2% | MBB | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 4.4% | 2.9% | MBB | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −20.0% | −17.4% | MBB | Deepest fall from a high to the low after it. |
| Risk-adjusted | ||||
| Sharpe | 0.36 | 0.24 | IGIB | Return above Treasury bills per unit of volatility. |
| Sortino | 0.49 | 0.35 | IGIB | Return above Treasury bills per unit of downside deviation. |
| Calmar | 0.18 | 0.15 | IGIB | Annualized return divided by the max drawdown. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 1,022 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, IGIB and MBB hold 0% of their money in the same securities at the same weight. Holdings dated Aug 31, 2026.
half
0% in common
Only in one fund ↓
Side by side
IGIB and MBB on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IGIB and MBB do different jobs. What does each one do in a portfolio?
- What each follows. IGIB follows ICE BofA 5-10 Year US Corporate Index and MBB follows Bloomberg U.S. MBS Index.
- Holdings in common. 0% of the weight is in the same securities (holdings dated Aug 31, 2026).
- Number of holdings. IGIB holds 3,064 positions and MBB holds 10813.
Data as of Oct 28, 2026.
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IGIB
IGIB tracks an index of 5-10 Year Investment Grade Corporate Bond. Over the year to Oct 28, 2026 it returned −1.8% with distributions reinvested. The prospectus expense ratio is 0.04% a year. It sat 3.2% 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.
Questions people ask
Links are sources, not endorsements. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, IGIB against MBB, data as of Oct 28, 2026. https://etfiq.com/compare/any/igib-vs-mbb
ETFIQ. (Oct 28, 2026). IGIB against MBB. Retrieved from https://etfiq.com/compare/any/igib-vs-mbb
[IGIB against MBB (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/igib-vs-mbb)
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