VGSH vs ISTB: Holdings Overlap
VGSHVanguard Short-term Treasury Index Fund
Vanguard · 91 holdings · $30.2B · 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 (VGSH: 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 VGSH and ISTB?
Vanguard Short-term Treasury Index Fund (VGSH, by Vanguard) holds 91 positions; iShares Core 1-5 Year USD Bond ETF (ISTB, by iShares) holds 7059. They have 88 holdings in common, and by portfolio weight the two funds are 28.3% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 28.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 88VGSH holds 91 · ISTB holds 7059
- Weight in Shared Holdings
- VGSH 96%·ISTB 28%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 VGSH
3 of 91 positions (2.8% of the fund) are not held by ISTB.
- U.S. Treasury Notes1.02%
- U.S. Treasury Notes0.99%
- U.S. Treasury Notes0.82%
Only in ISTB
6971 of 7059 positions (70.3% of the fund) are not held by VGSH. 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 |
|---|---|---|---|---|---|---|---|
| VGSH | +0.4% | +1.0% | +2.9% | +4.3% | +1.9% | +1.8% | 3.82% |
| 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 VGSH vs ISTB →
Shared Holdings(88)
The top 10 shared positions account for 20% of the overlap, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes.
| U.S. Treasury Notes | 1.29% | 0.64% | 0.64% |
|---|---|---|---|
| U.S. Treasury Notes | 0.83% | 0.62% | 0.62% |
| U.S. Treasury Notes | 1.11% | 0.60% | 0.60% |
| U.S. Treasury Notes | 1.31% | 0.59% | 0.59% |
| U.S. Treasury Notes | 1.26% | 0.58% | 0.58% |
| U.S. Treasury Notes | 1.16% | 0.57% | 0.57% |
| U.S. Treasury Notes | 1.20% | 0.55% | 0.55% |
| U.S. Treasury Notes | 1.25% | 0.55% | 0.55% |
| U.S. Treasury Notes | 1.25% | 0.52% | 0.52% |
| U.S. Treasury Notes | 0.81% | 0.51% | 0.51% |
| U.S. Treasury Notes | 1.19% | 0.50% | 0.50% |
| U.S. Treasury Notes | 1.26% | 0.50% | 0.50% |
| U.S. Treasury Notes | 0.97% | 0.49% | 0.49% |
| U.S. Treasury Notes | 1.03% | 0.48% | 0.48% |
| U.S. Treasury Notes | 1.17% | 0.47% | 0.47% |
| U.S. Treasury Notes | 1.06% | 0.47% | 0.47% |
| U.S. Treasury Notes | 0.89% | 0.46% | 0.46% |
| U.S. Treasury Notes | 2.24% | 0.46% | 0.46% |
| U.S. Treasury Notes | 1.19% | 0.45% | 0.45% |
| U.S. Treasury Notes | 1.25% | 0.45% | 0.45% |
| U.S. Treasury Notes | 1.01% | 0.45% | 0.45% |
| U.S. Treasury Notes | 1.20% | 0.45% | 0.45% |
| U.S. Treasury Notes | 0.78% | 0.43% | 0.43% |
| U.S. Treasury Notes | 0.91% | 0.43% | 0.43% |
| U.S. Treasury Notes | 1.00% | 0.42% | 0.42% |
Frequently Asked Questions
How much do VGSH and ISTB overlap?
VGSH and ISTB overlap by 28.3% of portfolio weight. They share 88 holdings (VGSH holds 91 positions and ISTB holds 7059), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VGSH and ISTB?
The two portfolios are 28.3% 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 VGSH 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 20% of the total overlap.
What does VGSH own that ISTB doesn't?
3 positions (2.8% of VGSH) are unique to VGSH, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes. In the other direction, 6971 positions (70.3% of ISTB) are unique to ISTB.