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Data as of Nov 12, 2026.

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IBDU vs ISTB: Differences, Returns & Fees

Return, fees and overlap, side by side.

Return gap
+0.4 pts
1 year to Nov 12, 2026: IBDU ahead, total return
Fee gap
0.04 pts
A year: IBDU 0.10%, ISTB 0.06%, per filings dated Feb 23, 2026
Overlap
4%
Share of the two books held in common, holdings dated Jul 31, 2026
Net flow
+$88m / +$80m
IBDU / ISTB, Oct 12, 2026 to Nov 11, 2026, daily basis

Risk and return

Sep 27, 2019 to Nov 6, 2026 · 371 weekly returns · each against IUSB
IBDU ISTB
Return
Total return edge Tie +16.9% +16.6%
Annualized edge Tie +2.2% +2.2%
Price return edge ISTB −10.1% −5.8%
Risk
Volatility edge ISTB 8.3% 3.1%
Max drawdown edge ISTB −18.9% −9.0%
Downside capture 100.2% 40.8%
Beta 1.21 0.48
Risk-adjusted
Sharpe edge IBDU −0.04 −0.22
Sortino edge IBDU −0.06 −0.31
Treynor −0.003 −0.015
Calmar edge ISTB 0.12 0.24
Against the benchmark
Alpha +1.6% a year +0.1% a year
Alpha t-stat 1.16 0.20
Information ratio 0.32 0.28
Tracking error 3.9% 3.4%
Reading

From Sep 2019 to Nov 2026, IBDU and ISTB returned about the same: +16.9% and +16.6%. ISTB swung less: 3.1% to 8.3%. ISTB fell less at its worst: −9.0% to −18.9%.

Full scorecard

19 measures Open ↓
Risk and return: IBDU vs ISTB: Differences, Returns & Fees
MeasureIBDUISTBIUSBEdgeHow it is measured
Return
Total return+16.9%+16.6%TiePrice change plus distributions, reinvested.
Annualized+2.2%+2.2%TieTotal return as a yearly rate.
Price return−10.1%−5.8%ISTBPrice change alone, distributions left out.
Risk
Volatility8.3%3.1%ISTBSpread of weekly returns, annualized. Lower is steadier.
Downside deviation6.4%2.3%ISTBLike volatility, counting only weeks below the Treasury bill rate.
Max drawdown−18.9%−9.0%ISTBDeepest fall from a high to the low after it.
Upside capture108.5%44.9%100.0%IBDUShare of its benchmark's rise caught in the weeks it rose.
Downside capture100.2%40.8%100.0%ISTBShare of its benchmark's fall taken in the weeks it fell. Lower is better.
Beta1.210.481.00ISTB lowerHow far it moves for each 1% its benchmark moves.
R squared0.800.881.00Not an edgeShare of its weekly moves its benchmark explains.
Risk-adjusted
Sharpe−0.04−0.22IBDUReturn above Treasury bills per unit of volatility.
Sortino−0.06−0.31IBDUReturn above Treasury bills per unit of downside deviation.
Treynor−0.003−0.015−0.016IBDUReturn above Treasury bills per unit of beta.
Calmar0.120.24ISTBAnnualized return divided by the max drawdown.
Against the benchmark
BenchmarkIUSBIUSBIUSBThe ETF each fund is measured against.
Alpha+1.6% a year+0.1% a year0.0%Not significantYearly return beyond what its beta to the benchmark predicts.
Alpha t-stat1.160.20Not an edgeHow sure the alpha is. Below 2, it could be chance.
Alpha range−1.1% to +4.3%−0.7% to +0.9%Both include zeroThe 95% range for the yearly alpha.
Information ratio0.320.28IBDUReturn against its benchmark per unit of tracking error.
Tracking error3.9%3.4%0.0%Not an edgeHow far weekly returns stray from the benchmark, annualized.

Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 371 weekly returns. Cash rate: the 13-week Treasury bill.

Pair scorecard

ISTB costs 0.04 points a year less; their one-year returns differ by 0.4 points; ISTB is 1.3 times larger.

IBDU vs ISTB: Differences, Returns & Fees
MeasureIBDUISTB
Return
Total return, 1 year+1.4%+1.0%
Benchmark
What it tracksBloomberg December 2029 Maturity Corporate IndexBloomberg U.S. Universal 1-5 Year Index
Cost and size
Expense ratio0.10%0.06%
Net assets$4.0bn$5.3bn
Holdings
Holdings in common4%

Method

Key numbers
+1.4%
IBDU total return, 1 year
+1.0%
ISTB total return, 1 year
0.10%
IBDU expense ratio
0.06%
ISTB expense ratio

What they share

4%

By the books each fund has filed, IBDU and ISTB hold 4% of their money in the same securities at the same weight. Holdings dated Jul 31, 2026.

0 half 100%

half

4% in common

Positions both hold · largest shared weight first IBDU ISTB
AbbVie Inc, due Nov 21, 2029 0.97% 0.03%
Salesforce Inc, due Mar 15, 2029 0.73% 0.03%
Oracle Corp, due Feb 4, 2029 0.58% 0.02%
Verizon Communications Inc, due Dec 3, 2029 0.63% 0.02%
Wells Fargo & Co, due Jan 24, 2029 0.48% 0.02%
Anheuser-Busch InBev Worldwide Inc, due Jan 23, 2029 0.56% 0.02%
NVIDIA Corp, due Jun 15, 2029 0.56% 0.02%
AT&T Inc, due Mar 1, 2029 0.58% 0.02%
International Business Machines Corp, due May 15, 2029 0.61% 0.02%
Cisco Systems Inc, due Feb 26, 2029 0.49% 0.02%
AbbVie Inc, due Mar 15, 2029 0.50% 0.02%
Fiserv Inc, due Jul 1, 2029 0.57% 0.02%
Only in one fund ↓
Only in IBDU
Essex Portfolio LP, due Mar 1, 2029 0.10%
Freeport-McMoRan Inc, due Sep 1, 2029 0.10%
Keybank National Association, due Apr 13, 2029 0.07%
Rohm and Haas Co, due Jul 15, 2029 0.06%
Hercules Capital Inc, due Feb 10, 2029 0.04%
Barings Private Credit Corp, due Feb 6, 2029 0.02%
Only in ISTB
U.S. Treasury Notes, due Jun 15, 2028 1.08%
U.S. Treasury Notes, due Feb 28, 2030 0.90%
U.S. Treasury Notes, due Oct 31, 2030 0.88%
U.S. Treasury Notes, due Nov 30, 2030 0.83%
U.S. Treasury Notes, due Jan 31, 2031 0.81%
U.S. Treasury Notes, due Sep 30, 2030 0.79%
U.S. Treasury Notes, due Aug 31, 2030 0.78%
U.S. Treasury Notes, due May 31, 2030 0.75%
Check overlap with more funds →

Side by side

IBDU iShares iBonds Dec 2029 Term Corporate ETF ISTB iShares Core 1-5 Year USD Bond ETF
Where it sits Bond ETF Bond ETF
Issuer iShares iShares
What it is Tracks an index Tracks an index
Total return, 1 year +1.4% +1.0%
Its benchmark over the same days −1.0% (IUSB) −1.0% (IUSB)
Gap to its benchmark +2.4 pts vs IUSB +2.0 pts vs IUSB
Expense ratio 0.10% 0.06%
Holdings 741 7602
Net assets $4.0bn $5.3bn

IBDU and ISTB on the fields both publish, as of Nov 12, 2026. Source: ETFIQ.

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About each fund
IBDU

IBDU tracks an index. Over the year to Nov 12, 2026 it returned +1.4% with distributions reinvested, against −1.0% for its benchmark, the Bloomberg U.S. Universal Index. The prospectus expense ratio is 0.10% a year.

ISTB

ISTB tracks an index. Over the year to Nov 12, 2026 it returned +1.0% with distributions reinvested, against −1.0% for its benchmark, the Bloomberg U.S. Universal Index. The prospectus expense ratio is 0.06% a year.

Questions people ask

Which returned more over the last year, IBDU or ISTB?
In the year to Nov 12, 2026, with distributions reinvested, IBDU returned +1.4% and ISTB +1.0%.
Which is cheaper, IBDU or ISTB?
ISTB is cheaper, by 0.04 percentage points a year. That is about $4 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
IBDU vs IBDWIBDU vs SUSBIBDU vs VSDBIBDU vs IGSBAPCB vs ISTBBSCS vs ISTBBSCT vs ISTBISTB vs NEAR
Where to next
IBDU on its own →ISTB on its own →Hold both: look the portfolio through →Rankings →IBDU dividend history →IBDU holdings →ISTB dividend history →ISTB holdings →Standards and sources →
Sources and dates
IBDU and ISTB filings on SEC EDGAR ↗
IBDU and ISTB prospectus with the expense ratio (SEC) ↗
iShares page for IBDU ↗
iShares page for ISTB ↗

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.

Cite this pageCitation, APA and Markdown

ETFIQ, IBDU against ISTB, data as of Nov 12, 2026. https://etfiq.com/compare/any/ibdu-vs-istb

Open data →

Free to use with attribution for data ETFIQ computes; issuer data stays under its owner's terms.

Net assets on Nov 12, 2026: $4.0bn for iShares iBonds Dec 2029 Term Corporate ETF and $5.3bn for iShares Core 1-5 Year USD Bond ETF.

IBDU on its own →ISTB on its own →
Growth of 100

IBDU and ISTB

Total return, distributions reinvested, 1 year.

IBDU +1.4%ISTB +1.0%
Nov 12, 2025Nov 12, 2026

IBDU +1.4%, ISTB +1.0%: IBDU +0.4 pts ahead, 1 year, Nov 12, 2025 to Nov 12, 2026.