IEI vs ISTB: Holdings Overlap
IEIiShares 3-7 Year Treasury Bond ETF
iShares · 83 holdings · $17.6B · as of 2026-05-31
ISTBiShares Core 1-5 Year USD Bond ETF
iShares · 7059 holdings · $5.1B · as of 2026-04-30
Holdings snapshots are 31 days apart (IEI: 2026-05-31, ISTB: 2026-04-30). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are IEI and ISTB?
iShares 3-7 Year Treasury Bond ETF (IEI, by iShares) holds 83 positions; iShares Core 1-5 Year USD Bond ETF (ISTB, by iShares) holds 7059. They have 39 holdings in common, and by portfolio weight the two funds are 20.8% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 20.8%Sum of the smaller weight of each shared holding
- Shared Holdings
- 39IEI holds 83 · ISTB holds 7059
- Weight in Shared Holdings
- IEI 46%·ISTB 21%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IEI
44 of 83 positions (52.7% of the fund) are not held by ISTB. Showing the top 30 by weight.
- U.S. Treasury Notes2.26%
- U.S. Treasury Notes2.11%
- U.S. Treasury Notes2.09%
- U.S. Treasury Notes2.09%
- U.S. Treasury Notes2.08%
- U.S. Treasury Notes2.05%
Only in ISTB
7020 of 7059 positions (77.1% of the fund) are not held by IEI. Showing the top 30 by weight.
- U.S. Treasury Notes0.83%
- U.S. Treasury Notes0.73%
- U.S. Treasury Notes0.64%
- U.S. Treasury Notes0.62%
- U.S. Treasury Notes0.60%
- U.S. Treasury Notes0.59%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IEI | +0.1% | -0.2% | +1.6% | +3.9% | +0.2% | +1.2% | 3.70% |
| ISTB | +0.3% | +1.0% | +3.0% | +5.0% | +1.9% | +2.3% | 4.27% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IEI vs ISTB →
Shared Holdings(39)
The top 10 shared positions account for 39% of the overlap, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes.
| U.S. Treasury Notes | 2.28% | 0.99% | 0.99% |
|---|---|---|---|
| U.S. Treasury Notes | 1.41% | 0.98% | 0.98% |
| U.S. Treasury Notes | 0.98% | 0.96% | 0.96% |
| U.S. Treasury Notes | 1.62% | 0.89% | 0.89% |
| U.S. Treasury Notes | 1.29% | 0.81% | 0.81% |
| U.S. Treasury Notes | 1.10% | 0.80% | 0.80% |
| U.S. Treasury Notes | 1.48% | 0.71% | 0.71% |
| U.S. Treasury Notes | 1.49% | 0.70% | 0.70% |
| U.S. Treasury Notes | 1.39% | 0.68% | 0.68% |
| U.S. Treasury Notes | 1.13% | 0.67% | 0.67% |
| U.S. Treasury Notes | 0.70% | 0.67% | 0.67% |
| U.S. Treasury Notes | 1.26% | 0.64% | 0.64% |
| U.S. Treasury Notes | 1.05% | 0.63% | 0.63% |
| U.S. Treasury Notes | 1.18% | 0.61% | 0.61% |
| U.S. Treasury Notes | 0.59% | 0.91% | 0.59% |
| U.S. Treasury Notes | 0.58% | 0.86% | 0.58% |
| U.S. Treasury Notes | 1.12% | 0.56% | 0.56% |
| U.S. Treasury Notes | 0.98% | 0.55% | 0.55% |
| U.S. Treasury Notes | 1.61% | 0.54% | 0.54% |
| U.S. Treasury Notes | 0.73% | 0.54% | 0.54% |
| U.S. Treasury Notes | 1.07% | 0.54% | 0.54% |
| U.S. Treasury Notes | 0.92% | 0.53% | 0.53% |
| U.S. Treasury Notes | 1.03% | 0.51% | 0.51% |
| U.S. Treasury Notes | 1.04% | 0.46% | 0.46% |
| U.S. Treasury Notes | 0.47% | 0.45% | 0.45% |
Frequently Asked Questions
How much do IEI and ISTB overlap?
IEI and ISTB overlap by 20.8% of portfolio weight. They share 39 holdings (IEI holds 83 positions and ISTB holds 7059), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IEI and ISTB?
The two portfolios are 20.8% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of IEI and ISTB?
The largest positions held by both funds are U.S. Treasury Notes, U.S. Treasury Notes, U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes. Together the top 10 shared positions account for 39% of the total overlap.
What does IEI own that ISTB doesn't?
44 positions (52.7% of IEI) are unique to IEI, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes. In the other direction, 7020 positions (77.1% of ISTB) are unique to ISTB.