How much do your ETFs overlap with each other?
Add the ETFs you own with their weights to see what you actually hold: how much is duplicated across funds, your single largest underlying position, and how each pair of funds overlaps.
Popular model portfolios
See the overlap inside well-known portfolios — each computed from real holdings.
- Bogleheads 3-Fund Bogleheads (World + EM + Bonds) SWDA · EIMI · AGGG
- All-World DIY 70/30 Developed World + Emerging Markets SWDA · EIMI
- All-World DIY Vanguard 70/30 (FTSE Developed + Emerging) VHVG · VFEA
- Redundancy demo All-World + World (overlap demo) VWCE · SWDA
- US large-cap tilt S&P 500 + NASDAQ 100 CSPX · CNDX
- Redundancy demo Two S&P 500 ETFs (duplicate-index demo) VUAA · CSPX
- Core-satellite World Core + Tech & Robotics Satellites SWDA · IUIT · RBOT
- Income tilt All-World + High-Dividend Tilt VWCE · VHYA
How we compute it
Each fund is normalized to its equity sleeve and scaled by your allocation, then every underlying security is aggregated across your funds. Redundancy is the portfolio weight that shows up in more than one fund:
redundancy = Σ ( total weight − largest single-fund weight )It is 0% when your funds share nothing and rises as they hold the same securities — two identical funds at 50/50 are 50% redundant. Concentration is your largest holding once all funds are looked through. Figures come from each fund's own published holdings, each with an “as of” date. This is information, not investment advice.