Two S&P 500 ETFs (duplicate-index demo): how much does it overlap?
The Two S&P 500 ETFs (duplicate-index demo) portfolio has a 47.22% holdings redundancy — the share of its weight that is duplicated across its 2 funds. Its single largest underlying holding is NVIDIA Corp at 7.8% of the whole portfolio. Computed from the funds' published holdings.
NVIDIA Corp
7.8% of the whole portfolio, across 2 fundsThe funds
A Vanguard and an iShares S&P 500 ETF held together — they track the same index, so the look-through shows near-total redundancy.
Top holdings, looked through
Each security aggregated across every fund
| Holding | In funds | Portfolio weight |
|---|---|---|
| NVIDIA Corp | 2 | 7.80% |
| Apple Inc | 2 | 7.11% |
| Microsoft Corp | 2 | 4.79% |
| Amazon.com Inc | 2 | 3.89% |
| Alphabet Inc | 2 | 3.35% |
| Broadcom Inc | 2 | 3.07% |
| Alphabet Inc | 2 | 2.68% |
| Meta Platforms Inc | 2 | 2.10% |
| Tesla Inc | 2 | 1.81% |
| Micron Technology Inc | 2 | 1.67% |
Pairwise overlap
How much each pair of funds shares
| Fund pair | Overlap |
|---|---|
| VUAA × CSPX | 94.1% |
Analyze your own portfolio
Open this portfolio in the interactive tool, then swap in the funds you actually own.
Redundancy = the sum, across every underlying security, of its total portfolio weight minus the largest single fund's contribution — the weight duplicated across funds. Figures derive from each issuer's published holdings. Methodology.