IEF vs ISTB: Holdings Overlap
IEFiShares 7-10 Year Treasury Bond ETF
iShares · 15 holdings · $47.3B · 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 (IEF: 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 IEF and ISTB?
iShares 7-10 Year Treasury Bond ETF (IEF, by iShares) holds 15 positions; iShares Core 1-5 Year USD Bond ETF (ISTB, by iShares) holds 7059. They have 0 holdings in common, and by portfolio weight the two funds are 0.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 0IEF holds 15 · ISTB holds 7059
- Weight in Shared Holdings
- IEF 0%·ISTB 0%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 IEF
15 of 15 positions (98.2% of the fund) are not held by ISTB.
- U.S. Treasury Notes9.54%
- U.S. Treasury Notes8.78%
- U.S. Treasury Notes8.75%
- U.S. Treasury Notes8.73%
- U.S. Treasury Notes8.71%
- U.S. Treasury Notes8.63%
Only in ISTB
7059 of 7059 positions (98.6% of the fund) are not held by IEF. Showing the top 30 by weight.
- U.S. Treasury Notes0.99%
- U.S. Treasury Notes0.98%
- U.S. Treasury Notes0.96%
- U.S. Treasury Notes0.91%
- U.S. Treasury Notes0.89%
- U.S. Treasury Notes0.86%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IEF | -0.2% | -0.9% | +1.3% | +3.1% | -1.6% | +0.5% | 3.95% |
| 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 IEF vs ISTB →
Shared Holdings(0)
These two funds have no holdings in common.
Frequently Asked Questions
How much do IEF and ISTB overlap?
IEF and ISTB overlap by 0.0% of portfolio weight. They share 0 holdings (IEF holds 15 positions and ISTB holds 7059), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IEF and ISTB?
The two portfolios are 0.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What does IEF own that ISTB doesn't?
15 positions (98.2% of IEF) are unique to IEF, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes. In the other direction, 7059 positions (98.6% of ISTB) are unique to ISTB.