Guides

Plain-English explainers — no jargon walls, no "talk to an advisor" upsell.

New: we ran the 15 most popular US ETFs through a look-through analysis — two of them are 99.6% the same. Read how much popular ETFs really overlap.

How to monitor ETF overlap over time Build a dated baseline, compare only compatible holdings snapshots, track change drivers, and avoid false drift from mixed data dates. What is ETF overlap? Weight vs count overlap, why repeated holdings can be easy to miss, and how to interpret the metric and its limits. Morningstar X-Ray alternatives Instant X-Ray is gone. An honest map of what replaces each feature — including the free ones. ETF overlap for European investors VWCE, IWDA, VUAA, EIMI — which UCITS ETFs secretly duplicate each other, and which actually diversify. How our numbers are computed Official issuer files, SEC filings, the formulas, and the known limitations — fully reproducible.

→ Check your portfolio's real exposure (free)

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Our options dashboards and guides (max pain, GEX, open interest) moved to our sister site Quant Data — same nightly data, now covering individual stocks as well as ETFs. Old links redirect automatically.