SPAB vs SPY: Holdings Overlap
SPABState Street® SPDR® Portfolio Aggregate Bond ETF
State Street (SPDR) · 8489 holdings · $9.8B · as of 2026-08-06
SPYState Street® SPDR® S&P 500® ETF Trust
State Street (SPDR) · 504 holdings · $812.0B · as of 2026-08-06
How similar are SPAB and SPY?
State Street® SPDR® Portfolio Aggregate Bond ETF (SPAB, by State Street (SPDR)) holds 8489 positions; State Street® SPDR® S&P 500® ETF Trust (SPY, by State Street (SPDR)) holds 504. They have 0 holdings in common, and by portfolio weight the two funds are 0.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 0SPAB holds 8489 · SPY holds 504
- Weight in Shared Holdings
- SPAB 0%·SPY 0%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
8489 of 8489 positions (99.2% of the fund) are not held by SPY. Showing the top 30 by weight.
- US TREASURY N/B 12/28 3.50.77%
- US TREASURY N/B 11/28 4.3750.43%
- US TREASURY N/B 01/28 3.50.42%
- US TREASURY N/B 03/31 3.8750.41%
- US TREASURY N/B 11/34 4.250.38%
- US TREASURY N/B 12/27 3.3750.38%
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% |
| SPY | +3.4% | +14.0% | +23.7% | +21.2% | +13.3% | +15.3% | 0.97% |
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 SPY →
Shared Holdings(0)
These two funds have no holdings in common.
Frequently Asked Questions
How much do SPAB and SPY overlap?
SPAB and SPY overlap by 0.0% of portfolio weight. They share 0 holdings (SPAB holds 8489 positions and SPY holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPAB and SPY?
The two portfolios are 0.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What does SPAB own that SPY doesn't?
8489 positions (99.2% of SPAB) are unique to SPAB, 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. In the other direction, 504 positions (99.9% of SPY) are unique to SPY.