SPAB vs SPTS: Holdings Overlap
SPABState Street® SPDR® Portfolio Aggregate Bond ETF
State Street (SPDR) · 8489 holdings · $9.8B · as of 2026-08-06
SPTSState Street® SPDR® Portfolio Short Term Treasury ETF
State Street (SPDR) · 96 holdings · $6.1B · as of 2026-08-06
How similar are SPAB and SPTS?
State Street® SPDR® Portfolio Aggregate Bond ETF (SPAB, by State Street (SPDR)) holds 8489 positions; State Street® SPDR® Portfolio Short Term Treasury ETF (SPTS, by State Street (SPDR)) holds 96. They have 91 holdings in common, and by portfolio weight the two funds are 16.2% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 16.2%Sum of the smaller weight of each shared holding
- Shared Holdings
- 91SPAB holds 8489 · SPTS holds 96
- Weight in Shared Holdings
- SPAB 16%·SPTS 97%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 SPAB
8398 of 8489 positions (83.0% of the fund) are not held by SPTS. Showing the top 30 by weight.
- US TREASURY N/B 03/31 3.8750.41%
- US TREASURY N/B 11/34 4.250.38%
- US TREASURY N/B 08/35 4.250.38%
- FNMA TBA 30 YR 5.5 SINGLE FAMILY MORTGAGE0.38%
- US TREASURY N/B 05/36 4.3750.38%
- US TREASURY N/B 05/35 4.250.37%
Only in SPTS
5 of 96 positions (2.2% of the fund) are not held by SPAB.
- US TREASURY N/B 11/27 0.6251.03%
- US TREASURY N/B 04/29 2.8750.80%
- US TREASURY N/B 11/27 6.1250.17%
- US TREASURY N/B 11/28 5.250.12%
- US TREASURY N/B 08/27 6.3750.09%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| SPAB | -0.3% | +0.0% | +2.5% | +4.2% | -0.2% | +1.4% | 4.11% |
| SPTS | +0.3% | +1.0% | +2.9% | +4.3% | +1.9% | +1.7% | 3.87% |
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 SPAB vs SPTS →
Shared Holdings(91)
The top 10 shared positions account for 24% of the overlap, led by US TREASURY N/B 12/28 3.5, US TREASURY N/B 11/28 4.375 and US TREASURY N/B 01/28 3.5.
| US TREASURY N/B 12/28 3.5 | 0.77% | 1.21% | 0.77% |
|---|---|---|---|
| US TREASURY N/B 11/28 4.375 | 0.43% | 1.11% | 0.43% |
| US TREASURY N/B 01/28 3.5 | 0.42% | 1.85% | 0.42% |
| US TREASURY N/B 12/27 3.375 | 0.38% | 1.37% | 0.38% |
| US TREASURY N/B 08/28 1.125 | 0.34% | 1.05% | 0.34% |
| US TREASURY N/B 11/27 3.375 | 0.32% | 1.37% | 0.32% |
| US TREASURY N/B 02/28 4.25 | 0.31% | 1.18% | 0.31% |
| US TREASURY N/B 07/28 4.25 | 0.31% | 1.08% | 0.31% |
| US TREASURY N/B 03/29 3.5 | 0.30% | 1.17% | 0.30% |
| US TREASURY N/B 09/28 3.375 | 0.29% | 1.13% | 0.29% |
| US TREASURY N/B 09/27 3.5 | 0.29% | 1.27% | 0.29% |
| US TREASURY N/B 12/28 3.75 | 0.26% | 1.11% | 0.26% |
| US TREASURY N/B 10/28 3.5 | 0.26% | 1.12% | 0.26% |
| US TREASURY N/B 06/28 4.125 | 0.25% | 1.15% | 0.25% |
| US TREASURY N/B 04/29 3.875 | 0.25% | 1.15% | 0.25% |
| US TREASURY N/B 06/29 4.25 | 0.24% | 1.35% | 0.24% |
| US TREASURY N/B 03/28 3.875 | 0.24% | 0.85% | 0.24% |
| US TREASURY N/B 10/28 4.875 | 0.24% | 1.07% | 0.24% |
| US TREASURY N/B 02/29 3.5 | 0.24% | 1.11% | 0.24% |
| US TREASURY N/B 10/27 3.5 | 0.22% | 0.92% | 0.22% |
| US TREASURY N/B 02/28 4 | 0.22% | 0.86% | 0.22% |
| US TREASURY N/B 07/29 4.125 | 0.22% | 1.17% | 0.22% |
| US TREASURY N/B 09/28 4.625 | 0.22% | 0.99% | 0.22% |
| US TREASURY N/B 07/29 2.625 | 0.21% | 0.65% | 0.21% |
| US TREASURY N/B 02/28 3.375 | 0.21% | 1.36% | 0.21% |
Frequently Asked Questions
How much do SPAB and SPTS overlap?
SPAB and SPTS overlap by 16.2% of portfolio weight. They share 91 holdings (SPAB holds 8489 positions and SPTS holds 96), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPAB and SPTS?
The two portfolios are 16.2% 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 SPAB and SPTS?
The largest positions held by both funds are US TREASURY N/B 12/28 3.5, US TREASURY N/B 11/28 4.375, US TREASURY N/B 01/28 3.5, US TREASURY N/B 12/27 3.375 and US TREASURY N/B 08/28 1.125. Together the top 10 shared positions account for 24% of the total overlap.
What does SPAB own that SPTS doesn't?
8398 positions (83.0% of SPAB) are unique to SPAB, led by US TREASURY N/B 03/31 3.875, US TREASURY N/B 11/34 4.25 and US TREASURY N/B 08/35 4.25. In the other direction, 5 positions (2.2% of SPTS) are unique to SPTS.