IGSB vs ISTB: Holdings Overlap
IGSBiShares 1-5 Year Investment Grade Corporate Bond ETF
iShares · 4605 holdings · $23.2B · 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 (IGSB: 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 IGSB and ISTB?
iShares 1-5 Year Investment Grade Corporate Bond ETF (IGSB, by iShares) holds 4605 positions; iShares Core 1-5 Year USD Bond ETF (ISTB, by iShares) holds 7059. They have 3888 holdings in common, and by portfolio weight the two funds are 23.0% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 23.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 3888IGSB holds 4605 · ISTB holds 7059
- Weight in Shared Holdings
- IGSB 89%·ISTB 23%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 IGSB
717 of 4605 positions (10.2% of the fund) are not held by ISTB. Showing the top 30 by weight.
- Eagle Funding Luxco Sarl0.31%
- Bank of America Corp0.11%
- Goldman Sachs Group Inc/The0.08%
- Meta Platforms Inc0.08%
- Saudi Arabian Oil Co0.08%
- Wells Fargo & Co0.08%
Only in ISTB
3171 of 7059 positions (75.5% of the fund) are not held by IGSB. 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 |
|---|---|---|---|---|---|---|---|
| IGSB | +0.3% | +1.2% | +3.5% | +5.6% | +2.5% | +2.7% | 4.61% |
| 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 IGSB vs ISTB →
Shared Holdings(3888)
The top 10 shared positions account for 2% of the overlap, led by T-Mobile USA Inc, Bank of America Corp and Goldman Sachs Group Inc/The.
| T-Mobile USA Inc | 0.18% | 0.04% | 0.04% |
|---|---|---|---|
| Bank of America Corp | 0.16% | 0.04% | 0.04% |
| Goldman Sachs Group Inc/The | 0.12% | 0.04% | 0.04% |
| Goldman Sachs Group Inc/The | 0.09% | 0.04% | 0.04% |
| AbbVie Inc | 0.14% | 0.04% | 0.04% |
| Amazon.com Inc | 0.13% | 0.03% | 0.03% |
| CVS Health Corp | 0.13% | 0.03% | 0.03% |
| Wells Fargo & Co | 0.11% | 0.03% | 0.03% |
| Mars Inc | 0.12% | 0.03% | 0.03% |
| Boeing Co/The | 0.12% | 0.03% | 0.03% |
| Medline Borrower LP | 0.05% | 0.03% | 0.03% |
| Bank of America Corp | 0.10% | 0.03% | 0.03% |
| Orange SA | 0.04% | 0.03% | 0.03% |
| Pfizer Investment Enterprises Pte Ltd | 0.11% | 0.03% | 0.03% |
| Amazon.com Inc | 0.08% | 0.03% | 0.03% |
| Verizon Communications Inc | 0.07% | 0.03% | 0.03% |
| Citigroup Inc | 0.10% | 0.03% | 0.03% |
| Citigroup Inc | 0.10% | 0.03% | 0.03% |
| Amgen Inc | 0.10% | 0.03% | 0.03% |
| Salesforce Inc | 0.11% | 0.03% | 0.03% |
| Comcast Corp | 0.09% | 0.03% | 0.03% |
| Goldman Sachs Group Inc/The | 0.09% | 0.03% | 0.03% |
| Morgan Stanley | 0.09% | 0.03% | 0.03% |
| Wells Fargo & Co | 0.10% | 0.02% | 0.02% |
| Deutsche Telekom International Finance BV | 0.11% | 0.02% | 0.02% |
Showing the top 250 of 3888 shared holdings by overlap weight.
Frequently Asked Questions
How much do IGSB and ISTB overlap?
IGSB and ISTB overlap by 23.0% of portfolio weight. They share 3888 holdings (IGSB holds 4605 positions and ISTB holds 7059), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IGSB and ISTB?
The two portfolios are 23.0% 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 IGSB and ISTB?
The largest positions held by both funds are T-Mobile USA Inc, Bank of America Corp, Goldman Sachs Group Inc/The, Goldman Sachs Group Inc/The and AbbVie Inc. Together the top 10 shared positions account for 2% of the total overlap.
What does IGSB own that ISTB doesn't?
717 positions (10.2% of IGSB) are unique to IGSB, led by Eagle Funding Luxco Sarl, Bank of America Corp and Goldman Sachs Group Inc/The. In the other direction, 3171 positions (75.5% of ISTB) are unique to ISTB.