Data as of Oct 28, 2026.
FSIG vs IBDU: Differences, Returns & Fees
On Jul 31, 2026 FSIG's duration was 2.9 years and IBDU's 2.6; IBDU charges 0.10% to FSIG's 0.44%.
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Net assets on Oct 27, 2026: $1.5bn for First Trust Limited Duration Investment Grade Corporate ETF and $4.0bn for iShares iBonds Dec 2029 Term Corporate ETF.
Pair scorecard
IBDU costs 0.34 points a year less; their one-year returns differ by 0.5 points; IBDU is 2.7 times larger.
| Measure | FSIG | IBDU |
|---|---|---|
| Return | ||
| Total return, 1 year | +0.8% | +1.3% |
| Benchmark | ||
| What it tracks | No index, actively managed | Bloomberg December 2029 Maturity Corporate Index |
| Cost and size | ||
| Expense ratio | 0.44% | 0.10% |
| Net assets, as of Oct 27, 2026 | $1.5bn | $4.0bn |
| Holdings | ||
| Holdings in common | 4% | |
Holdings in common uses holdings dated Jul 31, 2026. Method
Risk and return
Nov 26, 2021 to Oct 23, 2026 · 256 weekly returnsEach against its own benchmark: FSIG against AGG, Nov 26, 2021 to Oct 23, 2026; IBDU against IUSB, Sep 27, 2019 to Oct 23, 2026.
FSIG returned more: +13.2% to +6.8%. FSIG swung less: 2.8% to 5.4%. FSIG fell less at its worst: −6.6% to −17.6%.
Full scorecard
19 measures, with how each is measured Open ↓
| Measure | FSIG | IBDU | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +13.2% | +6.8% | FSIG | Price change plus distributions, reinvested. |
| Annualized | +2.6% | +1.3% | FSIG | Total return as a yearly rate. |
| Price return | −7.5% | −13.2% | FSIG | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 2.8% | 5.4% | FSIG | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 2.1% | 4.0% | FSIG | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −6.6% | −17.6% | FSIG | Deepest fall from a high to the low after it. |
| Upside capture | 45.9% | 109.0% | Share of its benchmark's rise caught in the weeks it rose. | |
| Downside capture | 38.3% | 100.2% | Share of its benchmark's fall taken in the weeks it fell. Lower is better. | |
| Beta | 0.42 | 1.21 | Not an edge | How far it moves for each 1% its benchmark moves. |
| R squared | 0.77 | 0.80 | Not an edge | Share of its weekly moves its benchmark explains. |
| Risk-adjusted | ||||
| Sharpe | −0.50 | −0.46 | IBDU (slight) | Return above Treasury bills per unit of volatility. |
| Sortino | −0.68 | −0.63 | IBDU (slight) | Return above Treasury bills per unit of downside deviation. |
| Treynor | −0.034 | −0.003 | Return above Treasury bills per unit of beta. | |
| Calmar | 0.39 | 0.08 | FSIG | Annualized return divided by the max drawdown. |
| Against the benchmark | ||||
| Benchmark | AGG | IUSB | The ETF each fund is measured against. | |
| Alpha | +0.3% a year | +1.7% a year | Not significant | Yearly return beyond what its beta to the benchmark predicts. |
| Alpha t-stat | 0.48 | 1.21 | Not an edge | How sure the alpha is. Below 2, it could be chance. |
| Alpha range | −0.9% to +1.5% | −1.1% to +4.4% | Includes zero | The 95% range for the yearly alpha. |
| Information ratio | 0.73 | 0.34 | Return against its benchmark per unit of tracking error. | |
| Tracking error | 3.7% | 3.9% | Not an edge | How far weekly returns stray from the benchmark, annualized. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 256 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, FSIG and IBDU hold 4% of their money in the same securities at the same weight. Holdings dated Jul 31, 2026.
half
4% in common
Only in one fund ↓
Side by side
FSIG and IBDU on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
FSIG and IBDU are built for the same job. How do they differ in cost, holdings and results?
- What each follows. FSIG follows No index, actively managed and IBDU follows Bloomberg December 2029 Maturity Corporate Index.
- Holdings in common. 4% of the weight is in the same securities (holdings dated Jul 31, 2026).
- Cost. FSIG charges 0.44% of assets a year and IBDU 0.10%, a gap of 0.34 points.
Data as of Oct 28, 2026.
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FSIG
FSIG is actively managed and tracks no index. Over the year to Oct 28, 2026 it returned +0.8% with distributions reinvested, against −1.4% for its benchmark, the Bloomberg US Aggregate Bond Index. The prospectus expense ratio is 0.44% a year.
IBDU
IBDU tracks an index. Over the year to Oct 28, 2026 it returned +1.3% with distributions reinvested, against −1.2% for its benchmark, the Bloomberg U.S. Universal Index. The prospectus expense ratio is 0.10% a year.
Questions people ask
- Which returned more over the last year, FSIG or IBDU?
- In the year to Oct 28, 2026, with distributions reinvested, FSIG returned +0.8% and IBDU +1.3%.
- Which is cheaper, FSIG or IBDU?
- IBDU is cheaper, by 0.34 percentage points a year. That is about $34 on $10,000 held for a year. Fees come from each fund's prospectus.
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, FSIG against IBDU, data as of Oct 28, 2026. https://etfiq.com/compare/any/fsig-vs-ibdu
ETFIQ. (Oct 28, 2026). FSIG against IBDU. Retrieved from https://etfiq.com/compare/any/fsig-vs-ibdu
[FSIG against IBDU (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/fsig-vs-ibdu)
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