ISTB — iShares Core 1-5 Year USD Bond ETF
Data updated: 2026-06-25
ISTB — iShares Core 1-5 Year USD Bond ETF data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Short Treasury / Sovereign Bond · $4.75B AUM · 0.06% expense ratio · 4.0% 1-yr return. From SEC regulatory filings.
ISTB Fund Overview
ISTB — iShares Core 1-5 Year USD Bond ETF is a US ETF managed by iSHARES TRUST, categorised as Short Treasury / Sovereign Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US ETF
- Manager: iSHARES TRUST
- Category: Short Treasury / Sovereign Bond
- Assets under management: $4.75B
- 1-year return: 4.0%
- Ticker: ISTB
- SEC CIK: 0001100663
- SEC series ID: S000038926
- Share class ID: C000119711
ISTB Holdings
Top 10 holdings of iShares Core 1-5 Year USD Bond ETF by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| BlackRock Funds III | 1.08% |
| United States Treasury | 0.99% |
| United States Treasury | 0.98% |
| United States Treasury | 0.96% |
| United States Treasury | 0.91% |
| United States Treasury | 0.89% |
| United States Treasury | 0.86% |
| Blackrock Cash Funds | 0.85% |
| United States Treasury | 0.83% |
| United States Treasury | 0.81% |
ISTB Portfolio Allocation
Asset-class allocation of iShares Core 1-5 Year USD Bond ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 92.8% |
| Securitized | 5.8% |
| Cash & Equivalents | 1.9% |
ISTB Performance
Total returns for ISTB (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.5% |
| 1 year | 4.0% |
| 3 years (annualised) | 4.7% |
| 5 years (annualised) | 1.9% |
ISTB Risk Information
Risk metrics for ISTB, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 1.7%
ISTB Costs and Fees
ISTB costs about $6 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.06%
- Gross expense ratio: 0.06%
- Portfolio turnover: 35%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
ISTB Cashflows
Over the 12 months to 2026-04, iShares Core 1-5 Year USD Bond ETF had net inflows of $225.44M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | $9.67M |
| 2026-03 | −$24.36M |
| 2026-02 | $34.06M |
| 2026-01 | $53.67M |
| 2025-12 | $24.40M |
| 2025-11 | $48.71M |
ISTB Debt Constituents
Largest debt holdings of iShares Core 1-5 Year USD Bond ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 0.99% |
| United States Treasury | 0.98% |
| United States Treasury | 0.96% |
| United States Treasury | 0.91% |
| United States Treasury | 0.89% |
| United States Treasury | 0.86% |
| United States Treasury | 0.83% |
| United States Treasury | 0.81% |
| United States Treasury | 0.80% |
| United States Treasury | 0.73% |
ISTB Prospectus and SEC Filings
Official iShares Core 1-5 Year USD Bond ETF filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Short Treasury / Sovereign Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.