IBDY vs SPBO: Differences, Returns & Fees
IBDY's duration was 5.5 years on Jul 31, 2026 and SPBO's 6.9 on Jun 30, 2026; SPBO charges 0.03% to IBDY's 0.10%. Net assets: $1.2bn on Oct 9, 2026 for iShares iBonds Dec 2033 Term Corporate ETF, and $2.1bn on Oct 8, 2026 for State Street SPDR Portfolio Corporate Bond ETF.
SPBO costs 0.07 points a year less; their one-year returns differ by 0.3 points; SPBO is 1.8 times larger.
| IBDY | SPBO | |
|---|---|---|
| Expense ratio | 0.10% | 0.03% |
| Net assets, as of Oct 8, 2026 | $1.2bn | $2.1bn |
| Total return, 1 year | −1.5% | −1.8% |
| What it tracks | Bloomberg December 2033 Maturity Corporate Index | Bloomberg U.S. Corporate Bond Index ? |
| Holdings in common | 5% | |
| Below its high | 4.2%, high on Feb 27, 2026 | 4.0%, high on Feb 26, 2026 |
Holdings in common uses holdings dated Jun 30, 2026 and Jul 31, 2026.
What they hold in common
By the books each fund has filed, IBDY and SPBO hold 5% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026 and Jul 31, 2026.
half
5% in common
On the same fields
IBDY and SPBO on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.
About IBDY
IBDY tracks an index. Over the year to Oct 9, 2026 it returned −1.5% with distributions reinvested. The prospectus expense ratio is 0.10% a year. It sat 4.2% below its high of Feb 27, 2026 on Oct 9, 2026.
About SPBO
SPBO tracks an index. Over the year to Oct 9, 2026 it returned −1.8% with distributions reinvested, against −1.9% for its benchmark, the Bloomberg U.S. Corporate Bond Index ?. The prospectus expense ratio is 0.03% a year. It sat 4.0% below its high of Feb 26, 2026 on Oct 9, 2026.
Questions people ask
- Which returned more over the last year, IBDY or SPBO?
- In the year to Oct 9, 2026, with distributions reinvested, IBDY returned −1.5% and SPBO −1.8%.
- Which is cheaper, IBDY or SPBO?
- SPBO is cheaper, by 0.07 percentage points a year. That is about $7 on $10,000 held for a year. Fees come from each fund's prospectus.
ETFIQ links to the documents behind every figure; a link is not an endorsement. 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, IBDY against SPBO, data as of Oct 9, 2026. https://etfiq.com/compare/any/ibdy-vs-spbo
ETFIQ. (Oct 9, 2026). IBDY against SPBO. Retrieved from https://etfiq.com/compare/any/ibdy-vs-spbo
[IBDY against SPBO (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/any/ibdy-vs-spbo)
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