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FFIU vs IUSB

UVA Unconstrained Medium-Term Fixed Income ETF

FFIUDNYSE Arca

iShares Core Universal USD Bond ETF

IUSBANasdaq

Overlap

No data

Expense ratio

IUSB −0.47pt a year

FFIU0.53%IUSB0.06%

Avg volume · 30D

IUSB 1429.9×the volume

FFIU4.28KIUSB6.13M

5Y return · a year

IUSB +0.9pt

FFIU−0.7%IUSB+0.2%

FFIU vs IUSB Performance

Oct 29, 2021 – Oct 30, 2026

−3.6%FFIU+0.9%IUSB

Oct 29, 2021 to Oct 30, 2026. FFIU −3.6%. IUSB +0.9%. Use the arrow keys to read each point.−15%−10%Oct 2021Apr 2024Oct 2026
Expense ratio
FFIU 0.53%
IUSB 0.06%, better
Fund size
FFIU $49M
IUSB $50.2B
1Y total return
FFIU −2.9%
IUSB 0.0%, better
Yield (12M)
FFIU 4.28%
IUSB 4.32%, better
Holdings
FFIU 129
IUSB 18280
Avg volume (30D)
FFIU 4.28K sh
IUSB 6.13M sh, better
NAV per share
FFIU $21.05
IUSB $44.91
52W range

ETF.net Grade

FFIU: Cost 16, Risk 30, Mission 36, Tradability 16, Holdings 57, Durability 43. IUSB: Cost 92, Risk 54, Mission 100, Tradability 89, Holdings 76, Durability 94.
Pillar letters and Scores for FFIU, IUSB, with each pillar’s weight
PillarFFIUIUSB
Cost30% weightF16A92Higher
Mission25% weightD36A100Higher
Risk15% weightD30C54Higher
Tradability15% weightF16A89Higher
Holdings10% weightB57A76Higher
Durability5% weightC43A94Higher

Rank among US Aggregate Bond funds

How we build Categories ›
Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

Same Category. FFIU and IUSB are both graded against the same 114 US Aggregate Bond funds, so their Grades compare head to head.

US Aggregate Bond⁠

Category · 114 funds
See all 114 ›

IUSB ranks 2nd and FFIU 109th of 114 funds in the US Aggregate Bond Category.

  1. Rank 1AAGGiShares Core U.S. Aggregate Bond ETFScore 87
  2. Rank 2AIUSBiShares Core Universal USD Bond ETFScore 86
  3. Rank 2ASCHZSchwab U.S. Aggregate Bond ETFScore 86
  4. Rank 108DEDGF3EDGE Dynamic Fixed Income ETFScore 31
  5. Rank 109DFFIUUVA Unconstrained Medium-Term Fixed Income ETFScore 28
  6. Rank 110DABXBAbacus Flexible Bond Leaders ETFScore 27

Our read on each fund

ETF.net Research

FFIUDUVA Unconstrained Medium-Term Fixed Income ETF

IUSBAiShares Core Universal USD Bond ETF

In short

FFIU A go-anywhere bond fund with a human at the wheel: no index to track, just an active manager picking across the fixed income market for current income. It has been running since 2017.

IUSB Most core bond funds stop at investment grade. IUSB keeps going, folding high-yield USD debt into the same wrapper across roughly 18,000 bonds, for 0.06% a year.

Stated mandate

FFIU The Fund seeks current income with limited risk to principal by investing mainly in fixed income securities of any kind. It normally invests at least 80% of assets in those securities.

IUSB The Fund seeks to track an index of U.S.-dollar-denominated bonds spanning investment-grade and high-yield sectors.

Why people hold it

  • FFIU Unconstrained means unconstrained: no benchmark to hug, and the prospectus allows fixed income of any kind, plus up to 20% in futures, options, cash or other funds.sec.gov
  • Built for income, not fireworks. At least 80% of assets sit in fixed income, the stated aim is current income with limited risk to principal, and cash goes out quarterly.sec.gov
  • Trading since 2017, so there is a real multi-year record across very different rate environments rather than a backtest.
  • IUSB 0.06% a year, a fraction of what the typical broad bond fund in its category charges, and iShares has run it since 2014.
  • Roughly 18,000 bonds spanning investment-grade and high-yield sectors, so one ticker covers ground a plain Agg tracker leaves on the table.ishares.com
  • Tracks its index closely, trades heavily, and sits on a multi-billion-dollar asset base. Income is paid monthly.
  • Among the strongest implementations in a crowded field of nearly 200 core bond funds.

Worth knowing

  • FFIU Costs 0.54% a year, above the roughly 0.36% median for core bond ETFs and well above index giants like BND, SPAB and SCHZ at 0.03%.
  • Small and thinly traded, which usually means wider bid-ask spreads and more gap between your fill price and the fund's underlying value.
  • Outcomes hinge on the manager's judgment rather than a published index, so there is no benchmark to measure the portfolio against day to day.
  • IUSB That high-yield sleeve is the trade-off: more credit risk than an investment-grade-only fund, and more movement when spreads widen.
  • BND, SPAB and SCHZ charge 0.03%, half IUSB's fee, but they stay inside investment grade.
  • Payouts land monthly, but the amount floats with the coupons underneath. Nothing about the income stream is fixed.

Full FFIU profile⁠

Full IUSB profile⁠

FFIU vs IUSB Holdings

How we measure overlap

Each holding counts at its smaller weight in the two funds, summed over the full Holdings. Sector, country and asset class use the same rule on each fund’s split. Cash, FX and derivative lines stay out of the counts. Two bond funds get no overlap figure.

FFIU vs IUSB Cost

Overpaying FFIU vs IUSB

$9,266

On $10,000 over 30 years. 7% growth a year before fees, expense ratio only.

  • FFIU 0.53%

    $10,536

  • IUSB 0.06%

    $1,270

$10,000
30 years

Cost over time

  • FFIU 0.53%
  • IUSB 0.06%
  • Overpaying
One line per fund, from year 0 to year 30. Use the arrow keys to read each point.$0$2.5K$5K$7.5K$10K$12.5K051015202530FFIU $10,536IUSB $1,270

Year by year

YearFFIUIUSBOverpaying
10$953$110$843
20$3,658$432$3,226
30$10,536$1,270$9,266

Expense ratio

  • 0.53%FFIU
  • 0.06%IUSB, cheaper
  • Middle half of US Aggregate Bond funds
  • Median 0.34%

IUSB 10th cheapest of 114 funds

FFIU 95th cheapest of 114 funds

FFIU vs IUSB Dividends

Last 12 months to Oct 30, 2026
Yield (12M)
FFIU 4.28%
IUSB 4.32%, better
Payout (12M)
FFIU $0.90
IUSB $1.94
Last payment
FFIU $0.23
IUSB $0.15
Ex-dividend
FFIU Sep 29, 2026
IUSB Oct 1, 2026
Paid on
FFIU Sep 30, 2026
IUSB Oct 6, 2026
Frequency
FFIU Quarterly
IUSB Monthly

Distribution history

Per share, 2023 to 2026, same scale for both

FFIUQuarterly · 22 paymentsAll FFIU payments⁠
One bar per payment. 22 payments from 2023 to 2026 YTD. Jan 30, 2023 $0.06; Feb 27, 2023 $0.06; Mar 30, 2023 $0.06; Apr 27, 2023 $0.07; May 30, 2023 $0.07; Jun 29, 2023 $0.07; Jul 28, 2023 $0.07; Aug 30, 2023 $0.07; Sep 28, 2023 $0.07; Oct 30, 2023 $0.01; Dec 28, 2023 $0.23; Mar 28, 2024 $0.23; Jun 28, 2024 $0.21; Sep 27, 2024 $0.21; Dec 30, 2024 $0.22; Mar 28, 2025 $0.22; Jun 27, 2025 $0.21; Sep 29, 2025 $0.22; Dec 30, 2025 $0.22; Mar 30, 2026 $0.23; Jun 29, 2026 $0.22; Sep 29, 2026 $0.23. Use the arrow keys to read each point.$0$0.2520232026YTD
IUSBMonthly · 45 paymentsAll IUSB payments⁠
One bar per payment. 45 payments from 2023 to 2026 YTD. Feb 1, 2023 $0.12; Mar 1, 2023 $0.12; Apr 3, 2023 $0.12; May 1, 2023 $0.13; Jun 1, 2023 $0.14; Jul 3, 2023 $0.13; Aug 1, 2023 $0.14; Sep 1, 2023 $0.13; Oct 2, 2023 $0.13; Nov 1, 2023 $0.14; Dec 1, 2023 $0.14; Dec 14, 2023 $0.15; Feb 1, 2024 $0.13; Mar 1, 2024 $0.15; Apr 1, 2024 $0.15; May 1, 2024 $0.15; Jun 3, 2024 $0.15; Jul 1, 2024 $0.15; Aug 1, 2024 $0.16; Sep 3, 2024 $0.16; Oct 1, 2024 $0.15; Nov 1, 2024 $0.16; Dec 2, 2024 $0.16; Dec 18, 2024 $0.16; Feb 3, 2025 $0.15; Mar 3, 2025 $0.16; Apr 1, 2025 $0.16; May 1, 2025 $0.16; Jun 2, 2025 $0.17; Jul 1, 2025 $0.16; Aug 1, 2025 $0.17; Sep 2, 2025 $0.16; Oct 1, 2025 $0.17; Nov 3, 2025 $0.16; Dec 1, 2025 $0.16; Dec 19, 2025 $0.16; Feb 2, 2026 $0.17; Mar 2, 2026 $0.16; Apr 1, 2026 $0.16; May 1, 2026 $0.16; Jun 1, 2026 $0.15; Jul 1, 2026 $0.16; Aug 3, 2026 $0.17; Sep 1, 2026 $0.17; Oct 1, 2026 $0.15. Use the arrow keys to read each point.$0$0.2520232026YTD

FFIU vs IUSB Risk

Fall from peak · 5 years

  • FFIU
  • IUSB
Oct 29, 2021 to Oct 30, 2026. Worst fall: FFIU −20.1% · Oct 2022. Use the arrow keys to read each point.−20%−15%−10%−5%0%Oct 2021Apr 2024Oct 2026

Risk facts

VolatilityStd dev, 3 years
FFIU 7.4%IUSB 5.5%, better
Return per unit of riskSharpe ratio, 3 years
FFIU 0.13IUSB 0.25, better
Worst fallMax drawdown, 5 years
FFIU −20.1%IUSB −17.4%, better
Market sensitivityBeta, 5 years
FFIU 1.18IUSB 0.96

FFIU and IUSB in the news

All news⁠

Popular comparisons

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