IUSB — iShares Core Universal USD Bond ETF

IUSB Price Performance — Growth of $10,000

Value of a $10,000 investment in IUSB over time, compared with SPY. Both lines are rebased to $10,000 on the first shared date. Based on total returns — prices are adjusted for dividends and splits, so this assumes distributions were reinvested. Hover or tap the chart for exact values.

IUSB Drawdown

The "underwater" chart: IUSB's decline from its highest prior value at each point in time. It shows how deep past losses ran and how long the fund took to recover to break-even.

Overview

The iShares Core Universal USD Bond ETF (IUSB) operates within the US Bonds - Broad category, where ETFValuer tracks a total of seven funds. Issued by iShares, this fund has accumulated assets under management of $42.8 billion and currently trades at a price of $45.46. It holds an overall rank of #268 out of 458 tracked ETFs across all categories and has received an ETFValuer grade of C with a score of 58.7 out of 100. The fund charges an expense ratio of 0.06% while offering a dividend yield of 4.21%. The substantial asset size and relatively low cost structure suggest significant investor adoption within its specific bond category. These metrics position the fund as a widely held option among the seven available in its sector.

Over the most recent trading day, the fund posted a return of +0.09%, though this was followed by a one-week decline of -0.72%. The one-month performance showed a further decrease of -1.31%, and the three-month return settled at -0.86%. Year-to-date figures indicate a slight loss of -0.24%, while the six-month return stands at -0.44%. In contrast, the one-year return reached +3.29%, and the three-year annualized return is recorded at +13.26%. This pattern illustrates a divergence where short-term horizons have experienced negative momentum while longer-term periods have delivered positive gains.

The fund carries a volatility label of Very Low and a beta of 0.96, indicating price movements that are generally subdued relative to the broader market. Despite this low volatility profile, the Sharpe ratio is recorded at -0.48, suggesting that the risk-adjusted returns have been negative over the measured period. The maximum drawdown experienced by the fund was -5.47%, reflecting the largest peak-to-trough decline observed. This combination of low volatility and a negative Sharpe ratio implies that while the fund may not experience extreme swings, it has struggled to generate sufficient returns to compensate for the risk taken. The data suggests a behavior where the fund has faced periods of decline without the offsetting upside typically required to improve risk-adjusted metrics.

AI-generated summary based on the data on this page.

IUSB Top Holdings

Holdings as of 2026-04-30 per the fund's most recent SEC N-PORT-P filing. Top 10 holdings make up 6.7% of net assets — a rough gauge of concentration risk (the higher this figure, the more the fund's return depends on a handful of names). To see how IUSB's holdings overlap with other ETFs you own or are considering, check the Stock Overlap tool.

Which Funds Overlap With IUSB

Holding two funds that own the same companies adds cost and complexity without adding much diversification. These tracked ETFs share the most names with IUSB's top 10 — SHV overlaps most, holding 2 of the same companies as IUSB's top 10 (3.8% of IUSB's assets).

Compares the top 10 reported holdings of each fund, so it's a floor on true overlap — two S&P 500 trackers overlap ~100% even when only 10 names are listed. Use the Stock Overlap tool to search by individual company.

Market Backdrop

10-Year Treasury Yield: 4.71% (as of 2026-07-23) — The yield on 10-year US Treasury bonds — the standard "risk-free rate" benchmark used to contextualize this fund’s Sharpe ratio and returns.

CBOE Volatility Index (VIX): 18.70 (as of 2026-07-23) — A real-time gauge of expected S&P 500 volatility over the next 30 days — useful context for this fund’s own volatility label.

Federal Funds Rate: 3.63% (as of 2026-06-01) — The Federal Reserve’s target policy rate, which anchors short-term borrowing costs across the economy.

IUSB Liquidity, Domicile & Tax Treatment

Liquidity: Quoted bid/ask spread is 0.11% and average daily volume is 5.8M/day. Tighter spreads and higher volume mean lower round-trip trading costs; this is a live-market snapshot and can widen during volatile sessions. AUM of $42.8B provides ample scale, supporting tight spreads and issuer commitment to keep the fund open.

Domicile & tax treatment: IUSB is a US-domiciled, SEC-registered ('40 Act) exchange-traded fund. Dividends and capital gains distributions are reported to US investors on Form 1099-DIV, and the fund is not subject to the PFIC reporting or UCITS-specific rules that apply to Irish- or Luxembourg-domiciled funds. Non-US investors should note that US-domiciled ETFs are generally subject to 30% US withholding tax on dividends (unless reduced by treaty) and to US estate tax exposure on the position — Irish-domiciled UCITS ETFs tracking the same index often avoid both, which is why non-US residents frequently prefer the UCITS equivalent where one exists. This is general information, not tax advice — consult a tax professional for your situation.

IUSB Performance History

How IUSB Compares to Other US Bonds - Broad ETFs