SPY vs USIG: Holdings Overlap
SPYState Street® SPDR® S&P 500® ETF Trust
State Street (SPDR) · 504 holdings · $812.0B · as of 2026-08-06
USIGiShares Broad USD Investment Grade Corporate Bond ETF
iShares · 11458 holdings · $17.3B · as of 2026-05-31
Holdings snapshots are 67 days apart (SPY: 2026-08-06, USIG: 2026-05-31). 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 SPY and USIG?
State Street® SPDR® S&P 500® ETF Trust (SPY, by State Street (SPDR)) holds 504 positions; iShares Broad USD Investment Grade Corporate Bond ETF (USIG, by iShares) holds 11458. 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
- 0SPY holds 504 · USIG holds 11458
- Weight in Shared Holdings
- SPY 0%·USIG 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 SPY
504 of 504 positions (99.9% of the fund) are not held by USIG. Showing the top 30 by weight.
Only in USIG
11458 of 11458 positions (99.0% of the fund) are not held by SPY. Showing the top 30 by weight.
- Anheuser-Busch Cos LLC / Anheuser-Busch InBev Worldwide Inc0.09%
- Bank of America Corp0.09%
- Eagle Funding Luxco Sarl0.08%
- CVS Health Corp0.08%
- T-Mobile USA Inc0.07%
- Goldman Sachs Group Inc/The0.07%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| SPY | +3.4% | +14.0% | +23.7% | +21.2% | +13.3% | +15.3% | 0.97% |
| USIG | -0.4% | +0.1% | +2.6% | +5.4% | +0.2% | +2.4% | 4.82% |
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 SPY vs USIG →
Shared Holdings(0)
These two funds have no holdings in common.
Frequently Asked Questions
How much do SPY and USIG overlap?
SPY and USIG overlap by 0.0% of portfolio weight. They share 0 holdings (SPY holds 504 positions and USIG holds 11458), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPY and USIG?
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 SPY own that USIG doesn't?
504 positions (99.9% of SPY) are unique to SPY, led by NVDA, AAPL and MSFT. In the other direction, 11458 positions (99.0% of USIG) are unique to USIG.