ISTB vs VGIT: Holdings Overlap
ISTBiShares Core 1-5 Year USD Bond ETF
iShares · 7059 holdings · $5.1B · as of 2026-04-30
VGITVanguard Intermediate-term Treasury Index Fund
Vanguard · 103 holdings · $42.5B · as of 2026-05-31
Holdings snapshots are 31 days apart (ISTB: 2026-04-30, VGIT: 2026-05-31). 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 ISTB and VGIT?
iShares Core 1-5 Year USD Bond ETF (ISTB, by iShares) holds 7059 positions; Vanguard Intermediate-term Treasury Index Fund (VGIT, by Vanguard) holds 103. They have 40 holdings in common, and by portfolio weight the two funds are 22.1% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 22.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 40ISTB holds 7059 · VGIT holds 103
- Weight in Shared Holdings
- ISTB 22%·VGIT 36%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 ISTB
7019 of 7059 positions (76.3% of the fund) are not held by VGIT. Showing the top 30 by weight.
- 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%
- U.S. Treasury Notes0.58%
Only in VGIT
63 of 103 positions (63.2% of the fund) are not held by ISTB. Showing the top 30 by weight.
- U.S. Treasury Notes1.94%
- U.S. Treasury Notes1.92%
- U.S. Treasury Notes1.90%
- U.S. Treasury Notes1.89%
- U.S. Treasury Notes1.89%
- U.S. Treasury Notes1.87%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| ISTB | +0.3% | +1.0% | +3.0% | +5.0% | +1.9% | +2.3% | 4.27% |
| VGIT | +0.0% | -0.3% | +1.7% | +3.8% | -0.1% | +1.2% | 3.89% |
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 ISTB vs VGIT →
Shared Holdings(40)
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 | 0.99% | 1.65% | 0.99% |
|---|---|---|---|
| U.S. Treasury Notes | 0.98% | 1.11% | 0.98% |
| U.S. Treasury Notes | 0.96% | 1.10% | 0.96% |
| U.S. Treasury Notes | 0.91% | 1.09% | 0.91% |
| U.S. Treasury Notes | 0.89% | 1.07% | 0.89% |
| U.S. Treasury Notes | 0.86% | 1.10% | 0.86% |
| U.S. Treasury Notes | 0.83% | 1.12% | 0.83% |
| U.S. Treasury Notes | 0.81% | 1.14% | 0.81% |
| U.S. Treasury Notes | 0.80% | 1.10% | 0.80% |
| U.S. Treasury Notes | 0.71% | 1.11% | 0.71% |
| U.S. Treasury Notes | 0.70% | 1.05% | 0.70% |
| U.S. Treasury Notes | 0.68% | 1.11% | 0.68% |
| U.S. Treasury Notes | 0.67% | 1.08% | 0.67% |
| U.S. Treasury Notes | 0.67% | 1.07% | 0.67% |
| U.S. Treasury Notes | 0.64% | 1.12% | 0.64% |
| U.S. Treasury Notes | 0.61% | 0.57% | 0.57% |
| U.S. Treasury Notes | 0.63% | 0.56% | 0.56% |
| U.S. Treasury Notes | 0.56% | 1.05% | 0.56% |
| U.S. Treasury Notes | 0.55% | 0.55% | 0.55% |
| U.S. Treasury Notes | 0.54% | 0.56% | 0.54% |
| U.S. Treasury Notes | 0.54% | 0.67% | 0.54% |
| U.S. Treasury Notes | 0.54% | 1.08% | 0.54% |
| U.S. Treasury Notes | 0.53% | 1.13% | 0.53% |
| U.S. Treasury Notes | 0.51% | 0.66% | 0.51% |
| U.S. Treasury Notes | 0.46% | 0.92% | 0.46% |
Frequently Asked Questions
How much do ISTB and VGIT overlap?
ISTB and VGIT overlap by 22.1% of portfolio weight. They share 40 holdings (ISTB holds 7059 positions and VGIT holds 103), based on each fund's latest SEC-reported holdings.
Is it redundant to own both ISTB and VGIT?
The two portfolios are 22.1% 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 ISTB and VGIT?
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 ISTB own that VGIT doesn't?
7019 positions (76.3% of ISTB) are unique to ISTB, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes. In the other direction, 63 positions (63.2% of VGIT) are unique to VGIT.