BSV vs IUSB: Holdings Overlap
BSVVanguard Short-term Bond Index Fund
Vanguard · 3156 holdings · $45.6B · as of 2026-03-31
IUSBiShares Core Universal USD Bond ETF
iShares · 17783 holdings · $43.2B · as of 2026-04-30
Holdings snapshots are 30 days apart (BSV: 2026-03-31, IUSB: 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 BSV and IUSB?
Vanguard Short-term Bond Index Fund (BSV, by Vanguard) holds 3156 positions; iShares Core Universal USD Bond ETF (IUSB, by iShares) holds 17783. They have 3071 holdings in common, and by portfolio weight the two funds are 30.0% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 30.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 3071BSV holds 3156 · IUSB holds 17783
- Weight in Shared Holdings
- BSV 96%·IUSB 31%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 BSV
85 of 3156 positions (2.0% of the fund) are not held by IUSB. Showing the top 30 by weight.
- U.S. Treasury Notes0.38%
- U.S. Treasury Notes0.38%
- U.S. Treasury Notes0.31%
- U.S. Treasury Notes0.26%
- Federal Home Loan Bank Bonds0.06%
- UBS AG/Stamford CT0.04%
Only in IUSB
14712 of 17783 positions (67.4% of the fund) are not held by BSV. Showing the top 30 by weight.
- U.S. Treasury Notes0.37%
- U.S. Treasury Notes0.37%
- U.S. Treasury Notes0.37%
- U.S. Treasury Notes0.36%
- U.S. Treasury Notes0.36%
- U.S. Treasury Notes0.36%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| BSV | +0.3% | +0.7% | +2.7% | +4.5% | +1.7% | +1.9% | 4.03% |
| IUSB | -0.2% | +0.3% | +2.8% | +4.7% | +0.2% | +1.8% | 4.28% |
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 BSV vs IUSB →
Shared Holdings(3071)
The top 10 shared positions account for 10% of the overlap, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes.
| U.S. Treasury Notes | 0.92% | 0.37% | 0.37% |
|---|---|---|---|
| U.S. Treasury Notes | 0.45% | 0.34% | 0.34% |
| U.S. Treasury Notes | 0.79% | 0.33% | 0.33% |
| U.S. Treasury Notes | 0.42% | 0.31% | 0.31% |
| U.S. Treasury Notes | 0.76% | 0.31% | 0.31% |
| U.S. Treasury Notes | 0.41% | 0.30% | 0.30% |
| U.S. Treasury Notes | 0.65% | 0.29% | 0.29% |
| U.S. Treasury Notes | 0.80% | 0.29% | 0.29% |
| U.S. Treasury Notes | 0.63% | 0.28% | 0.28% |
| U.S. Treasury Notes | 0.68% | 0.28% | 0.28% |
| U.S. Treasury Notes | 0.65% | 0.27% | 0.27% |
| U.S. Treasury Notes | 1.16% | 0.27% | 0.27% |
| U.S. Treasury Notes | 0.60% | 0.26% | 0.26% |
| U.S. Treasury Notes | 0.75% | 0.26% | 0.26% |
| U.S. Treasury Notes | 0.55% | 0.26% | 0.26% |
| U.S. Treasury Notes | 0.78% | 0.25% | 0.25% |
| U.S. Treasury Notes | 0.73% | 0.25% | 0.25% |
| U.S. Treasury Notes | 0.56% | 0.24% | 0.24% |
| U.S. Treasury Notes | 0.62% | 0.24% | 0.24% |
| U.S. Treasury Notes | 0.43% | 0.24% | 0.24% |
| U.S. Treasury Notes | 0.35% | 0.23% | 0.23% |
| U.S. Treasury Notes | 0.63% | 0.23% | 0.23% |
| U.S. Treasury Notes | 0.23% | 0.32% | 0.23% |
| U.S. Treasury Notes | 0.47% | 0.23% | 0.23% |
| U.S. Treasury Notes | 0.34% | 0.22% | 0.22% |
Showing the top 250 of 3071 shared holdings by overlap weight.
Frequently Asked Questions
How much do BSV and IUSB overlap?
BSV and IUSB overlap by 30.0% of portfolio weight. They share 3071 holdings (BSV holds 3156 positions and IUSB holds 17783), based on each fund's latest SEC-reported holdings.
Is it redundant to own both BSV and IUSB?
The two portfolios are 30.0% 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 BSV and IUSB?
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 10% of the total overlap.
What does BSV own that IUSB doesn't?
85 positions (2.0% of BSV) are unique to BSV, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes. In the other direction, 14712 positions (67.4% of IUSB) are unique to IUSB.