IUSB vs TMB
iShares Trust iShares Core Universal USD Bond ETF against Thornburg Multi Sector Bond ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
3%
264 shared positions
Fee gap
49 bp
IUSB is cheaper
1-year return gap
1.5 pts
TMB is ahead
Larger fund
IUSB
$49.3B
Side by side
| IUSB | TMB | |
|---|---|---|
| Fund | iShares Trust iShares Core Universal USD Bond ETF | Thornburg Multi Sector Bond ETF |
| Issuer | iShares | Thornburg |
| Category | Core Bond | Core Bond |
| Expense ratio | 0.06% | 0.55% |
| Assets | $49.3B | $185M |
| Average daily dollar volume | $474M | $2.5M |
| Listed | Jun 10, 2014 | Feb 4, 2025 |
| FrenzyCap score | 96 | 45 |
| 1-month return | −1.1% | −0.9% |
| 3-month return | −2.2% | −1.9% |
| Year to date | −4.5% | −3.1% |
| 1-year return | −5.6% | −4.1% |
| 30-day volatility | 4.8% | 3.8% |
| Worst drawdown, 1 year | −7.0% | −5.2% |
| Trailing 12-month yield | 4.37% | 4.39% |
| Holdings | 18,285 | 557 |
| Top 10 weight | 3.8% | 20.6% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | +$7.2B thru Jul 2026 | +$97M thru May 2026 |
| 30-day implied volatility | 7.0% | — |
| Holdings as of | as of Oct 20, 2026issuer data | as of May 31, 2026SEC filing |
Returns are price returns and exclude distributions. Flows are each fund's own latest reported months and may not cover the same period.
Largest shared holdings
3% of IUSB · 56% of TMB| Holding | IUSB | TMB |
|---|---|---|
| TREASURY NOTE 4.63%, due Feb 15, 2035 | 0.50% | 1.62% |
| TREASURY NOTE (2OLD), due Feb 15, 2036 | 0.36% | 4.49% |
| TREASURY NOTE (OLD) 4.38%, due May 15, 2036 | 0.33% | 3.67% |
| TREASURY NOTE 4.25%, due Nov 15, 2034 | 0.33% | 0.32% |
| TREASURY NOTE 3.88%, due Apr 30, 2031 | 0.20% | 1.09% |
| TREASURY NOTE 1.75%, due Jan 31, 2029 | 0.17% | 0.16% |
| TREASURY BOND 1.75%, due Aug 15, 2041 | 0.15% | 0.44% |
| TREASURY BOND 1.88%, due Nov 15, 2051 | 0.14% | 0.16% |
| TREASURY BOND 4.75%, due Feb 15, 2045 | 0.12% | 0.56% |
| TREASURY NOTE 3.75%, due Feb 28, 2033 | 0.11% | 3.94% |
| TREASURY NOTE 4%, due Jun 30, 2032 | 0.11% | 0.08% |
| TREASURY BOND 2.5%, due Feb 15, 2045 | 0.06% | 0.12% |
| TREASURY BOND 2.75%, due Nov 15, 2042 | 0.03% | 0.26% |
| GNMA2 30YR, due Nov 20, 2051 | 0.03% | 0.26% |
| GNMA2 30YR, due Jun 20, 2052 | 0.02% | 0.54% |
| TREASURY BOND 3%, due May 15, 2045 | 0.02% | 1.02% |
| CENTENE CORPORATION 4.63%, due Dec 15, 2029 | 0.01% | 0.16% |
| PETROLEOS MEXICANOS 5.95%, due Jan 28, 2031 | 0.01% | 0.15% |
| FNMA 30YR UMBS, due Aug 1, 2051 | 0.01% | 1.34% |
| FHLMC 30YR UMBS SUPER, due Dec 1, 2054 | 0.01% | 0.52% |
| AMAZON.COM INC 4.55%, due Mar 13, 2033 | 0.01% | 0.20% |
| CCO HOLDINGS LLC 144A, due Feb 1, 2031 | 0.01% | 0.17% |
| ALPHABET INC 3.7%, due Feb 15, 2029 | 0.01% | 0.08% |
| TENET HEALTHCARE CORP 6.13%, due Jun 15, 2030 | 0.01% | 0.13% |
| MORGAN STANLEY BANK NA (FXD-FRN) 5.02%, due Jan 12, 2029 | 0.01% | 0.14% |
Sector mix of the stock holdings
No sector breakdown: these funds hold few classified stocks.
More: full overlap table · IUSB holdings · TMB holdings
Fund data comes from each fund's SEC filings and issuer disclosures and is shown with the date it is as of. SEC portfolio and flow filings become public about 60 days after the period they cover. Nothing here is investment advice; see Terms.