ISTB vs GOVT: Holdings Overlap
ISTBiShares Core 1-5 Year USD Bond ETF
iShares · 7059 holdings · $5.1B · as of 2026-04-30
GOVTiShares U.S. Treasury Bond ETF
iShares · 223 holdings · $43.7B · as of 2026-04-30
How similar are ISTB and GOVT?
iShares Core 1-5 Year USD Bond ETF (ISTB, by iShares) holds 7059 positions; iShares U.S. Treasury Bond ETF (GOVT, by iShares) holds 223. They have 90 holdings in common, and by portfolio weight the two funds are 28.6% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 28.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 90ISTB holds 7059 · GOVT holds 223
- Weight in Shared Holdings
- ISTB 38%·GOVT 46%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
6969 of 7059 positions (60.5% of the fund) are not held by GOVT. Showing the top 30 by weight.
- U.S. Treasury Notes0.86%
- U.S. Treasury Notes0.67%
- U.S. Treasury Notes0.59%
- U.S. Treasury Notes0.57%
- U.S. Treasury Notes0.55%
- U.S. Treasury Notes0.54%
Only in GOVT
133 of 223 positions (52.9% of the fund) are not held by ISTB. Showing the top 30 by weight.
- U.S. Treasury Notes5.25%
- U.S. Treasury Notes2.92%
- U.S. Treasury Bonds1.55%
- U.S. Treasury Bonds1.51%
- U.S. Treasury Bonds1.49%
- U.S. Treasury Bonds1.39%
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% |
| GOVT | -0.2% | -0.3% | +1.6% | +3.3% | -0.8% | +0.7% | 3.64% |
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 GOVT →
Shared Holdings(90)
The top 10 shared positions account for 23% of the overlap, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes.
| U.S. Treasury Notes | 0.99% | 0.94% | 0.94% |
|---|---|---|---|
| U.S. Treasury Notes | 0.83% | 1.01% | 0.83% |
| U.S. Treasury Notes | 0.70% | 0.77% | 0.70% |
| U.S. Treasury Notes | 0.63% | 0.69% | 0.63% |
| U.S. Treasury Notes | 0.62% | 0.66% | 0.62% |
| U.S. Treasury Notes | 0.96% | 0.61% | 0.61% |
| U.S. Treasury Notes | 0.60% | 0.62% | 0.60% |
| U.S. Treasury Notes | 0.91% | 0.59% | 0.59% |
| U.S. Treasury Notes | 0.81% | 0.56% | 0.56% |
| U.S. Treasury Notes | 0.64% | 0.56% | 0.56% |
| U.S. Treasury Notes | 0.80% | 0.56% | 0.56% |
| U.S. Treasury Notes | 0.68% | 0.55% | 0.55% |
| U.S. Treasury Notes | 0.55% | 0.87% | 0.55% |
| U.S. Treasury Notes | 0.56% | 0.54% | 0.54% |
| U.S. Treasury Notes | 0.53% | 0.56% | 0.53% |
| U.S. Treasury Notes | 0.64% | 0.52% | 0.52% |
| U.S. Treasury Notes | 0.98% | 0.52% | 0.52% |
| U.S. Treasury Notes | 0.52% | 1.59% | 0.52% |
| U.S. Treasury Notes | 0.50% | 0.47% | 0.47% |
| U.S. Treasury Notes | 0.58% | 0.46% | 0.46% |
| U.S. Treasury Notes | 0.73% | 0.46% | 0.46% |
| U.S. Treasury Notes | 0.46% | 0.62% | 0.46% |
| U.S. Treasury Notes | 0.45% | 2.06% | 0.45% |
| U.S. Treasury Notes | 0.54% | 0.44% | 0.44% |
| U.S. Treasury Notes | 0.89% | 0.44% | 0.44% |
Frequently Asked Questions
How much do ISTB and GOVT overlap?
ISTB and GOVT overlap by 28.6% of portfolio weight. They share 90 holdings (ISTB holds 7059 positions and GOVT holds 223), based on each fund's latest SEC-reported holdings.
Is it redundant to own both ISTB and GOVT?
The two portfolios are 28.6% 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 GOVT?
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 23% of the total overlap.
What does ISTB own that GOVT doesn't?
6969 positions (60.5% 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, 133 positions (52.9% of GOVT) are unique to GOVT.