ETF Overlap & Correlation Analysis
Discover how much your ETFs overlap in holdings and correlate in price movements. Make smarter diversification decisions.
Supporting 23+ ETFs across all major categories
Popular Comparisons
⚔️ ETF Battle Royale
Head-to-head ETF comparisons with instant winners. Compare fees, diversification, liquidity, and more across 6 key metrics.
Holdings Overlap
See which stocks are shared between ETFs and their weight contribution
23+ ETFs Supported
Compare across US equities, international, bonds, sectors, and more
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Methodology
Overlap Calculation
We calculate weighted intersection using the minimum weight method:
overlap% = Σ min(weight_A, weight_B) for each shared holdingThis represents the true portfolio overlap considering position sizes.
Correlation Analysis
Pearson correlation coefficient on daily close prices over a 30-day rolling window. Correlation ranges from -1 (inverse) to +1 (perfect positive correlation).
Data Sources
- Holdings: Curated from public issuer files (iShares, Vanguard, SPDR)
- Prices: Yahoo Finance API
- Update frequency: Weekly for MVP, daily post-launch
Disclaimer: This tool provides educational information only. Holdings data may be outdated. Not financial or investment advice.